diff --git a/accessapproval/apiv1/access_approval_client.go b/accessapproval/apiv1/access_approval_client.go
index 25fa1ad..e30f7c9 100644
--- a/accessapproval/apiv1/access_approval_client.go
+++ b/accessapproval/apiv1/access_approval_client.go
@@ -341,7 +341,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -353,6 +353,7 @@
 
 func (c *gRPCClient) ListApprovalRequests(ctx context.Context, req *accessapprovalpb.ListApprovalRequestsMessage, opts ...gax.CallOption) *ApprovalRequestIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListApprovalRequests[0:len((*c.CallOptions).ListApprovalRequests):len((*c.CallOptions).ListApprovalRequests)], opts...)
 	it := &ApprovalRequestIterator{}
@@ -402,6 +403,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetApprovalRequest[0:len((*c.CallOptions).GetApprovalRequest):len((*c.CallOptions).GetApprovalRequest)], opts...)
 	var resp *accessapprovalpb.ApprovalRequest
@@ -423,6 +425,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ApproveApprovalRequest[0:len((*c.CallOptions).ApproveApprovalRequest):len((*c.CallOptions).ApproveApprovalRequest)], opts...)
 	var resp *accessapprovalpb.ApprovalRequest
@@ -444,6 +447,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DismissApprovalRequest[0:len((*c.CallOptions).DismissApprovalRequest):len((*c.CallOptions).DismissApprovalRequest)], opts...)
 	var resp *accessapprovalpb.ApprovalRequest
@@ -465,6 +469,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAccessApprovalSettings[0:len((*c.CallOptions).GetAccessApprovalSettings):len((*c.CallOptions).GetAccessApprovalSettings)], opts...)
 	var resp *accessapprovalpb.AccessApprovalSettings
@@ -486,6 +491,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "settings.name", url.QueryEscape(req.GetSettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAccessApprovalSettings[0:len((*c.CallOptions).UpdateAccessApprovalSettings):len((*c.CallOptions).UpdateAccessApprovalSettings)], opts...)
 	var resp *accessapprovalpb.AccessApprovalSettings
@@ -507,6 +513,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAccessApprovalSettings[0:len((*c.CallOptions).DeleteAccessApprovalSettings):len((*c.CallOptions).DeleteAccessApprovalSettings)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/accessapproval/apiv1/doc.go b/accessapproval/apiv1/doc.go
index 35b5f24..6a7f344 100644
--- a/accessapproval/apiv1/doc.go
+++ b/accessapproval/apiv1/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/accessapproval/apiv1/version.go b/accessapproval/apiv1/version.go
new file mode 100644
index 0000000..ae08da7
--- /dev/null
+++ b/accessapproval/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package accessapproval
+
+import "cloud.google.com/go/accessapproval/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/accesscontextmanager/apiv1/access_context_manager_client.go b/accesscontextmanager/apiv1/access_context_manager_client.go
index c8010f1..4c25c0a 100644
--- a/accesscontextmanager/apiv1/access_context_manager_client.go
+++ b/accesscontextmanager/apiv1/access_context_manager_client.go
@@ -626,7 +626,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -686,6 +686,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAccessPolicy[0:len((*c.CallOptions).GetAccessPolicy):len((*c.CallOptions).GetAccessPolicy)], opts...)
 	var resp *accesscontextmanagerpb.AccessPolicy
@@ -729,6 +730,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "policy.name", url.QueryEscape(req.GetPolicy().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAccessPolicy[0:len((*c.CallOptions).UpdateAccessPolicy):len((*c.CallOptions).UpdateAccessPolicy)], opts...)
 	var resp *longrunningpb.Operation
@@ -752,6 +754,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAccessPolicy[0:len((*c.CallOptions).DeleteAccessPolicy):len((*c.CallOptions).DeleteAccessPolicy)], opts...)
 	var resp *longrunningpb.Operation
@@ -770,6 +773,7 @@
 
 func (c *gRPCClient) ListAccessLevels(ctx context.Context, req *accesscontextmanagerpb.ListAccessLevelsRequest, opts ...gax.CallOption) *AccessLevelIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAccessLevels[0:len((*c.CallOptions).ListAccessLevels):len((*c.CallOptions).ListAccessLevels)], opts...)
 	it := &AccessLevelIterator{}
@@ -819,6 +823,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAccessLevel[0:len((*c.CallOptions).GetAccessLevel):len((*c.CallOptions).GetAccessLevel)], opts...)
 	var resp *accesscontextmanagerpb.AccessLevel
@@ -840,6 +845,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAccessLevel[0:len((*c.CallOptions).CreateAccessLevel):len((*c.CallOptions).CreateAccessLevel)], opts...)
 	var resp *longrunningpb.Operation
@@ -863,6 +869,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "access_level.name", url.QueryEscape(req.GetAccessLevel().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAccessLevel[0:len((*c.CallOptions).UpdateAccessLevel):len((*c.CallOptions).UpdateAccessLevel)], opts...)
 	var resp *longrunningpb.Operation
@@ -886,6 +893,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAccessLevel[0:len((*c.CallOptions).DeleteAccessLevel):len((*c.CallOptions).DeleteAccessLevel)], opts...)
 	var resp *longrunningpb.Operation
@@ -909,6 +917,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReplaceAccessLevels[0:len((*c.CallOptions).ReplaceAccessLevels):len((*c.CallOptions).ReplaceAccessLevels)], opts...)
 	var resp *longrunningpb.Operation
@@ -927,6 +936,7 @@
 
 func (c *gRPCClient) ListServicePerimeters(ctx context.Context, req *accesscontextmanagerpb.ListServicePerimetersRequest, opts ...gax.CallOption) *ServicePerimeterIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServicePerimeters[0:len((*c.CallOptions).ListServicePerimeters):len((*c.CallOptions).ListServicePerimeters)], opts...)
 	it := &ServicePerimeterIterator{}
@@ -976,6 +986,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetServicePerimeter[0:len((*c.CallOptions).GetServicePerimeter):len((*c.CallOptions).GetServicePerimeter)], opts...)
 	var resp *accesscontextmanagerpb.ServicePerimeter
@@ -997,6 +1008,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateServicePerimeter[0:len((*c.CallOptions).CreateServicePerimeter):len((*c.CallOptions).CreateServicePerimeter)], opts...)
 	var resp *longrunningpb.Operation
@@ -1020,6 +1032,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_perimeter.name", url.QueryEscape(req.GetServicePerimeter().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateServicePerimeter[0:len((*c.CallOptions).UpdateServicePerimeter):len((*c.CallOptions).UpdateServicePerimeter)], opts...)
 	var resp *longrunningpb.Operation
@@ -1043,6 +1056,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteServicePerimeter[0:len((*c.CallOptions).DeleteServicePerimeter):len((*c.CallOptions).DeleteServicePerimeter)], opts...)
 	var resp *longrunningpb.Operation
@@ -1066,6 +1080,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReplaceServicePerimeters[0:len((*c.CallOptions).ReplaceServicePerimeters):len((*c.CallOptions).ReplaceServicePerimeters)], opts...)
 	var resp *longrunningpb.Operation
@@ -1089,6 +1104,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CommitServicePerimeters[0:len((*c.CallOptions).CommitServicePerimeters):len((*c.CallOptions).CommitServicePerimeters)], opts...)
 	var resp *longrunningpb.Operation
@@ -1107,6 +1123,7 @@
 
 func (c *gRPCClient) ListGcpUserAccessBindings(ctx context.Context, req *accesscontextmanagerpb.ListGcpUserAccessBindingsRequest, opts ...gax.CallOption) *GcpUserAccessBindingIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGcpUserAccessBindings[0:len((*c.CallOptions).ListGcpUserAccessBindings):len((*c.CallOptions).ListGcpUserAccessBindings)], opts...)
 	it := &GcpUserAccessBindingIterator{}
@@ -1156,6 +1173,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGcpUserAccessBinding[0:len((*c.CallOptions).GetGcpUserAccessBinding):len((*c.CallOptions).GetGcpUserAccessBinding)], opts...)
 	var resp *accesscontextmanagerpb.GcpUserAccessBinding
@@ -1177,6 +1195,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGcpUserAccessBinding[0:len((*c.CallOptions).CreateGcpUserAccessBinding):len((*c.CallOptions).CreateGcpUserAccessBinding)], opts...)
 	var resp *longrunningpb.Operation
@@ -1200,6 +1219,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "gcp_user_access_binding.name", url.QueryEscape(req.GetGcpUserAccessBinding().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGcpUserAccessBinding[0:len((*c.CallOptions).UpdateGcpUserAccessBinding):len((*c.CallOptions).UpdateGcpUserAccessBinding)], opts...)
 	var resp *longrunningpb.Operation
@@ -1223,6 +1243,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGcpUserAccessBinding[0:len((*c.CallOptions).DeleteGcpUserAccessBinding):len((*c.CallOptions).DeleteGcpUserAccessBinding)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/accesscontextmanager/apiv1/doc.go b/accesscontextmanager/apiv1/doc.go
index ad9a752..56c910a 100644
--- a/accesscontextmanager/apiv1/doc.go
+++ b/accesscontextmanager/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/accesscontextmanager/apiv1/version.go b/accesscontextmanager/apiv1/version.go
new file mode 100644
index 0000000..7b5ba14
--- /dev/null
+++ b/accesscontextmanager/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package accesscontextmanager
+
+import "cloud.google.com/go/accesscontextmanager/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/aiplatform/apiv1/dataset_client.go b/aiplatform/apiv1/dataset_client.go
index 247e760..e54f3e6 100644
--- a/aiplatform/apiv1/dataset_client.go
+++ b/aiplatform/apiv1/dataset_client.go
@@ -302,7 +302,7 @@
 // use by Google-written clients.
 func (c *datasetGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -314,6 +314,7 @@
 
 func (c *datasetGRPCClient) CreateDataset(ctx context.Context, req *aiplatformpb.CreateDatasetRequest, opts ...gax.CallOption) (*CreateDatasetOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDataset[0:len((*c.CallOptions).CreateDataset):len((*c.CallOptions).CreateDataset)], opts...)
 	var resp *longrunningpb.Operation
@@ -332,6 +333,7 @@
 
 func (c *datasetGRPCClient) GetDataset(ctx context.Context, req *aiplatformpb.GetDatasetRequest, opts ...gax.CallOption) (*aiplatformpb.Dataset, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDataset[0:len((*c.CallOptions).GetDataset):len((*c.CallOptions).GetDataset)], opts...)
 	var resp *aiplatformpb.Dataset
@@ -348,6 +350,7 @@
 
 func (c *datasetGRPCClient) UpdateDataset(ctx context.Context, req *aiplatformpb.UpdateDatasetRequest, opts ...gax.CallOption) (*aiplatformpb.Dataset, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "dataset.name", url.QueryEscape(req.GetDataset().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDataset[0:len((*c.CallOptions).UpdateDataset):len((*c.CallOptions).UpdateDataset)], opts...)
 	var resp *aiplatformpb.Dataset
@@ -364,6 +367,7 @@
 
 func (c *datasetGRPCClient) ListDatasets(ctx context.Context, req *aiplatformpb.ListDatasetsRequest, opts ...gax.CallOption) *DatasetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDatasets[0:len((*c.CallOptions).ListDatasets):len((*c.CallOptions).ListDatasets)], opts...)
 	it := &DatasetIterator{}
@@ -408,6 +412,7 @@
 
 func (c *datasetGRPCClient) DeleteDataset(ctx context.Context, req *aiplatformpb.DeleteDatasetRequest, opts ...gax.CallOption) (*DeleteDatasetOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDataset[0:len((*c.CallOptions).DeleteDataset):len((*c.CallOptions).DeleteDataset)], opts...)
 	var resp *longrunningpb.Operation
@@ -426,6 +431,7 @@
 
 func (c *datasetGRPCClient) ImportData(ctx context.Context, req *aiplatformpb.ImportDataRequest, opts ...gax.CallOption) (*ImportDataOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportData[0:len((*c.CallOptions).ImportData):len((*c.CallOptions).ImportData)], opts...)
 	var resp *longrunningpb.Operation
@@ -444,6 +450,7 @@
 
 func (c *datasetGRPCClient) ExportData(ctx context.Context, req *aiplatformpb.ExportDataRequest, opts ...gax.CallOption) (*ExportDataOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportData[0:len((*c.CallOptions).ExportData):len((*c.CallOptions).ExportData)], opts...)
 	var resp *longrunningpb.Operation
@@ -462,6 +469,7 @@
 
 func (c *datasetGRPCClient) ListDataItems(ctx context.Context, req *aiplatformpb.ListDataItemsRequest, opts ...gax.CallOption) *DataItemIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDataItems[0:len((*c.CallOptions).ListDataItems):len((*c.CallOptions).ListDataItems)], opts...)
 	it := &DataItemIterator{}
@@ -506,6 +514,7 @@
 
 func (c *datasetGRPCClient) GetAnnotationSpec(ctx context.Context, req *aiplatformpb.GetAnnotationSpecRequest, opts ...gax.CallOption) (*aiplatformpb.AnnotationSpec, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAnnotationSpec[0:len((*c.CallOptions).GetAnnotationSpec):len((*c.CallOptions).GetAnnotationSpec)], opts...)
 	var resp *aiplatformpb.AnnotationSpec
@@ -522,6 +531,7 @@
 
 func (c *datasetGRPCClient) ListAnnotations(ctx context.Context, req *aiplatformpb.ListAnnotationsRequest, opts ...gax.CallOption) *AnnotationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAnnotations[0:len((*c.CallOptions).ListAnnotations):len((*c.CallOptions).ListAnnotations)], opts...)
 	it := &AnnotationIterator{}
diff --git a/aiplatform/apiv1/doc.go b/aiplatform/apiv1/doc.go
index b1c1d49..cf849b2 100644
--- a/aiplatform/apiv1/doc.go
+++ b/aiplatform/apiv1/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/aiplatform/apiv1/endpoint_client.go b/aiplatform/apiv1/endpoint_client.go
index c57e3fe..1a14e4b 100644
--- a/aiplatform/apiv1/endpoint_client.go
+++ b/aiplatform/apiv1/endpoint_client.go
@@ -277,7 +277,7 @@
 // use by Google-written clients.
 func (c *endpointGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -289,6 +289,7 @@
 
 func (c *endpointGRPCClient) CreateEndpoint(ctx context.Context, req *aiplatformpb.CreateEndpointRequest, opts ...gax.CallOption) (*CreateEndpointOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEndpoint[0:len((*c.CallOptions).CreateEndpoint):len((*c.CallOptions).CreateEndpoint)], opts...)
 	var resp *longrunningpb.Operation
@@ -307,6 +308,7 @@
 
 func (c *endpointGRPCClient) GetEndpoint(ctx context.Context, req *aiplatformpb.GetEndpointRequest, opts ...gax.CallOption) (*aiplatformpb.Endpoint, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEndpoint[0:len((*c.CallOptions).GetEndpoint):len((*c.CallOptions).GetEndpoint)], opts...)
 	var resp *aiplatformpb.Endpoint
@@ -323,6 +325,7 @@
 
 func (c *endpointGRPCClient) ListEndpoints(ctx context.Context, req *aiplatformpb.ListEndpointsRequest, opts ...gax.CallOption) *EndpointIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEndpoints[0:len((*c.CallOptions).ListEndpoints):len((*c.CallOptions).ListEndpoints)], opts...)
 	it := &EndpointIterator{}
@@ -367,6 +370,7 @@
 
 func (c *endpointGRPCClient) UpdateEndpoint(ctx context.Context, req *aiplatformpb.UpdateEndpointRequest, opts ...gax.CallOption) (*aiplatformpb.Endpoint, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint.name", url.QueryEscape(req.GetEndpoint().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEndpoint[0:len((*c.CallOptions).UpdateEndpoint):len((*c.CallOptions).UpdateEndpoint)], opts...)
 	var resp *aiplatformpb.Endpoint
@@ -383,6 +387,7 @@
 
 func (c *endpointGRPCClient) DeleteEndpoint(ctx context.Context, req *aiplatformpb.DeleteEndpointRequest, opts ...gax.CallOption) (*DeleteEndpointOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEndpoint[0:len((*c.CallOptions).DeleteEndpoint):len((*c.CallOptions).DeleteEndpoint)], opts...)
 	var resp *longrunningpb.Operation
@@ -401,6 +406,7 @@
 
 func (c *endpointGRPCClient) DeployModel(ctx context.Context, req *aiplatformpb.DeployModelRequest, opts ...gax.CallOption) (*DeployModelOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeployModel[0:len((*c.CallOptions).DeployModel):len((*c.CallOptions).DeployModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -419,6 +425,7 @@
 
 func (c *endpointGRPCClient) UndeployModel(ctx context.Context, req *aiplatformpb.UndeployModelRequest, opts ...gax.CallOption) (*UndeployModelOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UndeployModel[0:len((*c.CallOptions).UndeployModel):len((*c.CallOptions).UndeployModel)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/aiplatform/apiv1/featurestore_client.go b/aiplatform/apiv1/featurestore_client.go
index 02984ad..8e73113 100644
--- a/aiplatform/apiv1/featurestore_client.go
+++ b/aiplatform/apiv1/featurestore_client.go
@@ -457,7 +457,7 @@
 // use by Google-written clients.
 func (c *featurestoreGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -469,6 +469,7 @@
 
 func (c *featurestoreGRPCClient) CreateFeaturestore(ctx context.Context, req *aiplatformpb.CreateFeaturestoreRequest, opts ...gax.CallOption) (*CreateFeaturestoreOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateFeaturestore[0:len((*c.CallOptions).CreateFeaturestore):len((*c.CallOptions).CreateFeaturestore)], opts...)
 	var resp *longrunningpb.Operation
@@ -487,6 +488,7 @@
 
 func (c *featurestoreGRPCClient) GetFeaturestore(ctx context.Context, req *aiplatformpb.GetFeaturestoreRequest, opts ...gax.CallOption) (*aiplatformpb.Featurestore, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFeaturestore[0:len((*c.CallOptions).GetFeaturestore):len((*c.CallOptions).GetFeaturestore)], opts...)
 	var resp *aiplatformpb.Featurestore
@@ -503,6 +505,7 @@
 
 func (c *featurestoreGRPCClient) ListFeaturestores(ctx context.Context, req *aiplatformpb.ListFeaturestoresRequest, opts ...gax.CallOption) *FeaturestoreIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFeaturestores[0:len((*c.CallOptions).ListFeaturestores):len((*c.CallOptions).ListFeaturestores)], opts...)
 	it := &FeaturestoreIterator{}
@@ -547,6 +550,7 @@
 
 func (c *featurestoreGRPCClient) UpdateFeaturestore(ctx context.Context, req *aiplatformpb.UpdateFeaturestoreRequest, opts ...gax.CallOption) (*UpdateFeaturestoreOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "featurestore.name", url.QueryEscape(req.GetFeaturestore().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFeaturestore[0:len((*c.CallOptions).UpdateFeaturestore):len((*c.CallOptions).UpdateFeaturestore)], opts...)
 	var resp *longrunningpb.Operation
@@ -565,6 +569,7 @@
 
 func (c *featurestoreGRPCClient) DeleteFeaturestore(ctx context.Context, req *aiplatformpb.DeleteFeaturestoreRequest, opts ...gax.CallOption) (*DeleteFeaturestoreOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteFeaturestore[0:len((*c.CallOptions).DeleteFeaturestore):len((*c.CallOptions).DeleteFeaturestore)], opts...)
 	var resp *longrunningpb.Operation
@@ -583,6 +588,7 @@
 
 func (c *featurestoreGRPCClient) CreateEntityType(ctx context.Context, req *aiplatformpb.CreateEntityTypeRequest, opts ...gax.CallOption) (*CreateEntityTypeOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEntityType[0:len((*c.CallOptions).CreateEntityType):len((*c.CallOptions).CreateEntityType)], opts...)
 	var resp *longrunningpb.Operation
@@ -601,6 +607,7 @@
 
 func (c *featurestoreGRPCClient) GetEntityType(ctx context.Context, req *aiplatformpb.GetEntityTypeRequest, opts ...gax.CallOption) (*aiplatformpb.EntityType, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEntityType[0:len((*c.CallOptions).GetEntityType):len((*c.CallOptions).GetEntityType)], opts...)
 	var resp *aiplatformpb.EntityType
@@ -617,6 +624,7 @@
 
 func (c *featurestoreGRPCClient) ListEntityTypes(ctx context.Context, req *aiplatformpb.ListEntityTypesRequest, opts ...gax.CallOption) *EntityTypeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEntityTypes[0:len((*c.CallOptions).ListEntityTypes):len((*c.CallOptions).ListEntityTypes)], opts...)
 	it := &EntityTypeIterator{}
@@ -661,6 +669,7 @@
 
 func (c *featurestoreGRPCClient) UpdateEntityType(ctx context.Context, req *aiplatformpb.UpdateEntityTypeRequest, opts ...gax.CallOption) (*aiplatformpb.EntityType, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entity_type.name", url.QueryEscape(req.GetEntityType().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEntityType[0:len((*c.CallOptions).UpdateEntityType):len((*c.CallOptions).UpdateEntityType)], opts...)
 	var resp *aiplatformpb.EntityType
@@ -677,6 +686,7 @@
 
 func (c *featurestoreGRPCClient) DeleteEntityType(ctx context.Context, req *aiplatformpb.DeleteEntityTypeRequest, opts ...gax.CallOption) (*DeleteEntityTypeOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEntityType[0:len((*c.CallOptions).DeleteEntityType):len((*c.CallOptions).DeleteEntityType)], opts...)
 	var resp *longrunningpb.Operation
@@ -695,6 +705,7 @@
 
 func (c *featurestoreGRPCClient) CreateFeature(ctx context.Context, req *aiplatformpb.CreateFeatureRequest, opts ...gax.CallOption) (*CreateFeatureOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateFeature[0:len((*c.CallOptions).CreateFeature):len((*c.CallOptions).CreateFeature)], opts...)
 	var resp *longrunningpb.Operation
@@ -713,6 +724,7 @@
 
 func (c *featurestoreGRPCClient) BatchCreateFeatures(ctx context.Context, req *aiplatformpb.BatchCreateFeaturesRequest, opts ...gax.CallOption) (*BatchCreateFeaturesOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCreateFeatures[0:len((*c.CallOptions).BatchCreateFeatures):len((*c.CallOptions).BatchCreateFeatures)], opts...)
 	var resp *longrunningpb.Operation
@@ -731,6 +743,7 @@
 
 func (c *featurestoreGRPCClient) GetFeature(ctx context.Context, req *aiplatformpb.GetFeatureRequest, opts ...gax.CallOption) (*aiplatformpb.Feature, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFeature[0:len((*c.CallOptions).GetFeature):len((*c.CallOptions).GetFeature)], opts...)
 	var resp *aiplatformpb.Feature
@@ -747,6 +760,7 @@
 
 func (c *featurestoreGRPCClient) ListFeatures(ctx context.Context, req *aiplatformpb.ListFeaturesRequest, opts ...gax.CallOption) *FeatureIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFeatures[0:len((*c.CallOptions).ListFeatures):len((*c.CallOptions).ListFeatures)], opts...)
 	it := &FeatureIterator{}
@@ -791,6 +805,7 @@
 
 func (c *featurestoreGRPCClient) UpdateFeature(ctx context.Context, req *aiplatformpb.UpdateFeatureRequest, opts ...gax.CallOption) (*aiplatformpb.Feature, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "feature.name", url.QueryEscape(req.GetFeature().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFeature[0:len((*c.CallOptions).UpdateFeature):len((*c.CallOptions).UpdateFeature)], opts...)
 	var resp *aiplatformpb.Feature
@@ -807,6 +822,7 @@
 
 func (c *featurestoreGRPCClient) DeleteFeature(ctx context.Context, req *aiplatformpb.DeleteFeatureRequest, opts ...gax.CallOption) (*DeleteFeatureOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteFeature[0:len((*c.CallOptions).DeleteFeature):len((*c.CallOptions).DeleteFeature)], opts...)
 	var resp *longrunningpb.Operation
@@ -825,6 +841,7 @@
 
 func (c *featurestoreGRPCClient) ImportFeatureValues(ctx context.Context, req *aiplatformpb.ImportFeatureValuesRequest, opts ...gax.CallOption) (*ImportFeatureValuesOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entity_type", url.QueryEscape(req.GetEntityType())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportFeatureValues[0:len((*c.CallOptions).ImportFeatureValues):len((*c.CallOptions).ImportFeatureValues)], opts...)
 	var resp *longrunningpb.Operation
@@ -843,6 +860,7 @@
 
 func (c *featurestoreGRPCClient) BatchReadFeatureValues(ctx context.Context, req *aiplatformpb.BatchReadFeatureValuesRequest, opts ...gax.CallOption) (*BatchReadFeatureValuesOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "featurestore", url.QueryEscape(req.GetFeaturestore())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchReadFeatureValues[0:len((*c.CallOptions).BatchReadFeatureValues):len((*c.CallOptions).BatchReadFeatureValues)], opts...)
 	var resp *longrunningpb.Operation
@@ -861,6 +879,7 @@
 
 func (c *featurestoreGRPCClient) ExportFeatureValues(ctx context.Context, req *aiplatformpb.ExportFeatureValuesRequest, opts ...gax.CallOption) (*ExportFeatureValuesOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entity_type", url.QueryEscape(req.GetEntityType())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportFeatureValues[0:len((*c.CallOptions).ExportFeatureValues):len((*c.CallOptions).ExportFeatureValues)], opts...)
 	var resp *longrunningpb.Operation
@@ -879,6 +898,7 @@
 
 func (c *featurestoreGRPCClient) SearchFeatures(ctx context.Context, req *aiplatformpb.SearchFeaturesRequest, opts ...gax.CallOption) *FeatureIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchFeatures[0:len((*c.CallOptions).SearchFeatures):len((*c.CallOptions).SearchFeatures)], opts...)
 	it := &FeatureIterator{}
diff --git a/aiplatform/apiv1/featurestore_online_serving_client.go b/aiplatform/apiv1/featurestore_online_serving_client.go
index 3d81cad..94e25ea 100644
--- a/aiplatform/apiv1/featurestore_online_serving_client.go
+++ b/aiplatform/apiv1/featurestore_online_serving_client.go
@@ -185,7 +185,7 @@
 // use by Google-written clients.
 func (c *featurestoreOnlineServingGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -197,6 +197,7 @@
 
 func (c *featurestoreOnlineServingGRPCClient) ReadFeatureValues(ctx context.Context, req *aiplatformpb.ReadFeatureValuesRequest, opts ...gax.CallOption) (*aiplatformpb.ReadFeatureValuesResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entity_type", url.QueryEscape(req.GetEntityType())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReadFeatureValues[0:len((*c.CallOptions).ReadFeatureValues):len((*c.CallOptions).ReadFeatureValues)], opts...)
 	var resp *aiplatformpb.ReadFeatureValuesResponse
@@ -213,6 +214,7 @@
 
 func (c *featurestoreOnlineServingGRPCClient) StreamingReadFeatureValues(ctx context.Context, req *aiplatformpb.StreamingReadFeatureValuesRequest, opts ...gax.CallOption) (aiplatformpb.FeaturestoreOnlineServingService_StreamingReadFeatureValuesClient, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entity_type", url.QueryEscape(req.GetEntityType())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	var resp aiplatformpb.FeaturestoreOnlineServingService_StreamingReadFeatureValuesClient
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/aiplatform/apiv1/index_client.go b/aiplatform/apiv1/index_client.go
index 1493c86..0101ca5 100644
--- a/aiplatform/apiv1/index_client.go
+++ b/aiplatform/apiv1/index_client.go
@@ -255,7 +255,7 @@
 // use by Google-written clients.
 func (c *indexGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -267,6 +267,7 @@
 
 func (c *indexGRPCClient) CreateIndex(ctx context.Context, req *aiplatformpb.CreateIndexRequest, opts ...gax.CallOption) (*CreateIndexOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateIndex[0:len((*c.CallOptions).CreateIndex):len((*c.CallOptions).CreateIndex)], opts...)
 	var resp *longrunningpb.Operation
@@ -285,6 +286,7 @@
 
 func (c *indexGRPCClient) GetIndex(ctx context.Context, req *aiplatformpb.GetIndexRequest, opts ...gax.CallOption) (*aiplatformpb.Index, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIndex[0:len((*c.CallOptions).GetIndex):len((*c.CallOptions).GetIndex)], opts...)
 	var resp *aiplatformpb.Index
@@ -301,6 +303,7 @@
 
 func (c *indexGRPCClient) ListIndexes(ctx context.Context, req *aiplatformpb.ListIndexesRequest, opts ...gax.CallOption) *IndexIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListIndexes[0:len((*c.CallOptions).ListIndexes):len((*c.CallOptions).ListIndexes)], opts...)
 	it := &IndexIterator{}
@@ -345,6 +348,7 @@
 
 func (c *indexGRPCClient) UpdateIndex(ctx context.Context, req *aiplatformpb.UpdateIndexRequest, opts ...gax.CallOption) (*UpdateIndexOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "index.name", url.QueryEscape(req.GetIndex().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateIndex[0:len((*c.CallOptions).UpdateIndex):len((*c.CallOptions).UpdateIndex)], opts...)
 	var resp *longrunningpb.Operation
@@ -363,6 +367,7 @@
 
 func (c *indexGRPCClient) DeleteIndex(ctx context.Context, req *aiplatformpb.DeleteIndexRequest, opts ...gax.CallOption) (*DeleteIndexOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteIndex[0:len((*c.CallOptions).DeleteIndex):len((*c.CallOptions).DeleteIndex)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/aiplatform/apiv1/index_endpoint_client.go b/aiplatform/apiv1/index_endpoint_client.go
index 5892de9..6c30deb 100644
--- a/aiplatform/apiv1/index_endpoint_client.go
+++ b/aiplatform/apiv1/index_endpoint_client.go
@@ -294,7 +294,7 @@
 // use by Google-written clients.
 func (c *indexEndpointGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -306,6 +306,7 @@
 
 func (c *indexEndpointGRPCClient) CreateIndexEndpoint(ctx context.Context, req *aiplatformpb.CreateIndexEndpointRequest, opts ...gax.CallOption) (*CreateIndexEndpointOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateIndexEndpoint[0:len((*c.CallOptions).CreateIndexEndpoint):len((*c.CallOptions).CreateIndexEndpoint)], opts...)
 	var resp *longrunningpb.Operation
@@ -324,6 +325,7 @@
 
 func (c *indexEndpointGRPCClient) GetIndexEndpoint(ctx context.Context, req *aiplatformpb.GetIndexEndpointRequest, opts ...gax.CallOption) (*aiplatformpb.IndexEndpoint, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIndexEndpoint[0:len((*c.CallOptions).GetIndexEndpoint):len((*c.CallOptions).GetIndexEndpoint)], opts...)
 	var resp *aiplatformpb.IndexEndpoint
@@ -340,6 +342,7 @@
 
 func (c *indexEndpointGRPCClient) ListIndexEndpoints(ctx context.Context, req *aiplatformpb.ListIndexEndpointsRequest, opts ...gax.CallOption) *IndexEndpointIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListIndexEndpoints[0:len((*c.CallOptions).ListIndexEndpoints):len((*c.CallOptions).ListIndexEndpoints)], opts...)
 	it := &IndexEndpointIterator{}
@@ -384,6 +387,7 @@
 
 func (c *indexEndpointGRPCClient) UpdateIndexEndpoint(ctx context.Context, req *aiplatformpb.UpdateIndexEndpointRequest, opts ...gax.CallOption) (*aiplatformpb.IndexEndpoint, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "index_endpoint.name", url.QueryEscape(req.GetIndexEndpoint().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateIndexEndpoint[0:len((*c.CallOptions).UpdateIndexEndpoint):len((*c.CallOptions).UpdateIndexEndpoint)], opts...)
 	var resp *aiplatformpb.IndexEndpoint
@@ -400,6 +404,7 @@
 
 func (c *indexEndpointGRPCClient) DeleteIndexEndpoint(ctx context.Context, req *aiplatformpb.DeleteIndexEndpointRequest, opts ...gax.CallOption) (*DeleteIndexEndpointOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteIndexEndpoint[0:len((*c.CallOptions).DeleteIndexEndpoint):len((*c.CallOptions).DeleteIndexEndpoint)], opts...)
 	var resp *longrunningpb.Operation
@@ -418,6 +423,7 @@
 
 func (c *indexEndpointGRPCClient) DeployIndex(ctx context.Context, req *aiplatformpb.DeployIndexRequest, opts ...gax.CallOption) (*DeployIndexOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "index_endpoint", url.QueryEscape(req.GetIndexEndpoint())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeployIndex[0:len((*c.CallOptions).DeployIndex):len((*c.CallOptions).DeployIndex)], opts...)
 	var resp *longrunningpb.Operation
@@ -436,6 +442,7 @@
 
 func (c *indexEndpointGRPCClient) UndeployIndex(ctx context.Context, req *aiplatformpb.UndeployIndexRequest, opts ...gax.CallOption) (*UndeployIndexOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "index_endpoint", url.QueryEscape(req.GetIndexEndpoint())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UndeployIndex[0:len((*c.CallOptions).UndeployIndex):len((*c.CallOptions).UndeployIndex)], opts...)
 	var resp *longrunningpb.Operation
@@ -454,6 +461,7 @@
 
 func (c *indexEndpointGRPCClient) MutateDeployedIndex(ctx context.Context, req *aiplatformpb.MutateDeployedIndexRequest, opts ...gax.CallOption) (*MutateDeployedIndexOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "index_endpoint", url.QueryEscape(req.GetIndexEndpoint())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MutateDeployedIndex[0:len((*c.CallOptions).MutateDeployedIndex):len((*c.CallOptions).MutateDeployedIndex)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/aiplatform/apiv1/job_client.go b/aiplatform/apiv1/job_client.go
index 2d7aa44..b7a83b0 100644
--- a/aiplatform/apiv1/job_client.go
+++ b/aiplatform/apiv1/job_client.go
@@ -493,7 +493,7 @@
 // use by Google-written clients.
 func (c *jobGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -505,6 +505,7 @@
 
 func (c *jobGRPCClient) CreateCustomJob(ctx context.Context, req *aiplatformpb.CreateCustomJobRequest, opts ...gax.CallOption) (*aiplatformpb.CustomJob, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCustomJob[0:len((*c.CallOptions).CreateCustomJob):len((*c.CallOptions).CreateCustomJob)], opts...)
 	var resp *aiplatformpb.CustomJob
@@ -521,6 +522,7 @@
 
 func (c *jobGRPCClient) GetCustomJob(ctx context.Context, req *aiplatformpb.GetCustomJobRequest, opts ...gax.CallOption) (*aiplatformpb.CustomJob, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCustomJob[0:len((*c.CallOptions).GetCustomJob):len((*c.CallOptions).GetCustomJob)], opts...)
 	var resp *aiplatformpb.CustomJob
@@ -537,6 +539,7 @@
 
 func (c *jobGRPCClient) ListCustomJobs(ctx context.Context, req *aiplatformpb.ListCustomJobsRequest, opts ...gax.CallOption) *CustomJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCustomJobs[0:len((*c.CallOptions).ListCustomJobs):len((*c.CallOptions).ListCustomJobs)], opts...)
 	it := &CustomJobIterator{}
@@ -581,6 +584,7 @@
 
 func (c *jobGRPCClient) DeleteCustomJob(ctx context.Context, req *aiplatformpb.DeleteCustomJobRequest, opts ...gax.CallOption) (*DeleteCustomJobOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteCustomJob[0:len((*c.CallOptions).DeleteCustomJob):len((*c.CallOptions).DeleteCustomJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -599,6 +603,7 @@
 
 func (c *jobGRPCClient) CancelCustomJob(ctx context.Context, req *aiplatformpb.CancelCustomJobRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelCustomJob[0:len((*c.CallOptions).CancelCustomJob):len((*c.CallOptions).CancelCustomJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -611,6 +616,7 @@
 
 func (c *jobGRPCClient) CreateDataLabelingJob(ctx context.Context, req *aiplatformpb.CreateDataLabelingJobRequest, opts ...gax.CallOption) (*aiplatformpb.DataLabelingJob, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDataLabelingJob[0:len((*c.CallOptions).CreateDataLabelingJob):len((*c.CallOptions).CreateDataLabelingJob)], opts...)
 	var resp *aiplatformpb.DataLabelingJob
@@ -627,6 +633,7 @@
 
 func (c *jobGRPCClient) GetDataLabelingJob(ctx context.Context, req *aiplatformpb.GetDataLabelingJobRequest, opts ...gax.CallOption) (*aiplatformpb.DataLabelingJob, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDataLabelingJob[0:len((*c.CallOptions).GetDataLabelingJob):len((*c.CallOptions).GetDataLabelingJob)], opts...)
 	var resp *aiplatformpb.DataLabelingJob
@@ -643,6 +650,7 @@
 
 func (c *jobGRPCClient) ListDataLabelingJobs(ctx context.Context, req *aiplatformpb.ListDataLabelingJobsRequest, opts ...gax.CallOption) *DataLabelingJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDataLabelingJobs[0:len((*c.CallOptions).ListDataLabelingJobs):len((*c.CallOptions).ListDataLabelingJobs)], opts...)
 	it := &DataLabelingJobIterator{}
@@ -687,6 +695,7 @@
 
 func (c *jobGRPCClient) DeleteDataLabelingJob(ctx context.Context, req *aiplatformpb.DeleteDataLabelingJobRequest, opts ...gax.CallOption) (*DeleteDataLabelingJobOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDataLabelingJob[0:len((*c.CallOptions).DeleteDataLabelingJob):len((*c.CallOptions).DeleteDataLabelingJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -705,6 +714,7 @@
 
 func (c *jobGRPCClient) CancelDataLabelingJob(ctx context.Context, req *aiplatformpb.CancelDataLabelingJobRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelDataLabelingJob[0:len((*c.CallOptions).CancelDataLabelingJob):len((*c.CallOptions).CancelDataLabelingJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -717,6 +727,7 @@
 
 func (c *jobGRPCClient) CreateHyperparameterTuningJob(ctx context.Context, req *aiplatformpb.CreateHyperparameterTuningJobRequest, opts ...gax.CallOption) (*aiplatformpb.HyperparameterTuningJob, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateHyperparameterTuningJob[0:len((*c.CallOptions).CreateHyperparameterTuningJob):len((*c.CallOptions).CreateHyperparameterTuningJob)], opts...)
 	var resp *aiplatformpb.HyperparameterTuningJob
@@ -733,6 +744,7 @@
 
 func (c *jobGRPCClient) GetHyperparameterTuningJob(ctx context.Context, req *aiplatformpb.GetHyperparameterTuningJobRequest, opts ...gax.CallOption) (*aiplatformpb.HyperparameterTuningJob, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetHyperparameterTuningJob[0:len((*c.CallOptions).GetHyperparameterTuningJob):len((*c.CallOptions).GetHyperparameterTuningJob)], opts...)
 	var resp *aiplatformpb.HyperparameterTuningJob
@@ -749,6 +761,7 @@
 
 func (c *jobGRPCClient) ListHyperparameterTuningJobs(ctx context.Context, req *aiplatformpb.ListHyperparameterTuningJobsRequest, opts ...gax.CallOption) *HyperparameterTuningJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListHyperparameterTuningJobs[0:len((*c.CallOptions).ListHyperparameterTuningJobs):len((*c.CallOptions).ListHyperparameterTuningJobs)], opts...)
 	it := &HyperparameterTuningJobIterator{}
@@ -793,6 +806,7 @@
 
 func (c *jobGRPCClient) DeleteHyperparameterTuningJob(ctx context.Context, req *aiplatformpb.DeleteHyperparameterTuningJobRequest, opts ...gax.CallOption) (*DeleteHyperparameterTuningJobOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteHyperparameterTuningJob[0:len((*c.CallOptions).DeleteHyperparameterTuningJob):len((*c.CallOptions).DeleteHyperparameterTuningJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -811,6 +825,7 @@
 
 func (c *jobGRPCClient) CancelHyperparameterTuningJob(ctx context.Context, req *aiplatformpb.CancelHyperparameterTuningJobRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelHyperparameterTuningJob[0:len((*c.CallOptions).CancelHyperparameterTuningJob):len((*c.CallOptions).CancelHyperparameterTuningJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -823,6 +838,7 @@
 
 func (c *jobGRPCClient) CreateBatchPredictionJob(ctx context.Context, req *aiplatformpb.CreateBatchPredictionJobRequest, opts ...gax.CallOption) (*aiplatformpb.BatchPredictionJob, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBatchPredictionJob[0:len((*c.CallOptions).CreateBatchPredictionJob):len((*c.CallOptions).CreateBatchPredictionJob)], opts...)
 	var resp *aiplatformpb.BatchPredictionJob
@@ -839,6 +855,7 @@
 
 func (c *jobGRPCClient) GetBatchPredictionJob(ctx context.Context, req *aiplatformpb.GetBatchPredictionJobRequest, opts ...gax.CallOption) (*aiplatformpb.BatchPredictionJob, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBatchPredictionJob[0:len((*c.CallOptions).GetBatchPredictionJob):len((*c.CallOptions).GetBatchPredictionJob)], opts...)
 	var resp *aiplatformpb.BatchPredictionJob
@@ -855,6 +872,7 @@
 
 func (c *jobGRPCClient) ListBatchPredictionJobs(ctx context.Context, req *aiplatformpb.ListBatchPredictionJobsRequest, opts ...gax.CallOption) *BatchPredictionJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBatchPredictionJobs[0:len((*c.CallOptions).ListBatchPredictionJobs):len((*c.CallOptions).ListBatchPredictionJobs)], opts...)
 	it := &BatchPredictionJobIterator{}
@@ -899,6 +917,7 @@
 
 func (c *jobGRPCClient) DeleteBatchPredictionJob(ctx context.Context, req *aiplatformpb.DeleteBatchPredictionJobRequest, opts ...gax.CallOption) (*DeleteBatchPredictionJobOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteBatchPredictionJob[0:len((*c.CallOptions).DeleteBatchPredictionJob):len((*c.CallOptions).DeleteBatchPredictionJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -917,6 +936,7 @@
 
 func (c *jobGRPCClient) CancelBatchPredictionJob(ctx context.Context, req *aiplatformpb.CancelBatchPredictionJobRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelBatchPredictionJob[0:len((*c.CallOptions).CancelBatchPredictionJob):len((*c.CallOptions).CancelBatchPredictionJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -929,6 +949,7 @@
 
 func (c *jobGRPCClient) CreateModelDeploymentMonitoringJob(ctx context.Context, req *aiplatformpb.CreateModelDeploymentMonitoringJobRequest, opts ...gax.CallOption) (*aiplatformpb.ModelDeploymentMonitoringJob, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateModelDeploymentMonitoringJob[0:len((*c.CallOptions).CreateModelDeploymentMonitoringJob):len((*c.CallOptions).CreateModelDeploymentMonitoringJob)], opts...)
 	var resp *aiplatformpb.ModelDeploymentMonitoringJob
@@ -945,6 +966,7 @@
 
 func (c *jobGRPCClient) SearchModelDeploymentMonitoringStatsAnomalies(ctx context.Context, req *aiplatformpb.SearchModelDeploymentMonitoringStatsAnomaliesRequest, opts ...gax.CallOption) *ModelMonitoringStatsAnomaliesIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "model_deployment_monitoring_job", url.QueryEscape(req.GetModelDeploymentMonitoringJob())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchModelDeploymentMonitoringStatsAnomalies[0:len((*c.CallOptions).SearchModelDeploymentMonitoringStatsAnomalies):len((*c.CallOptions).SearchModelDeploymentMonitoringStatsAnomalies)], opts...)
 	it := &ModelMonitoringStatsAnomaliesIterator{}
@@ -989,6 +1011,7 @@
 
 func (c *jobGRPCClient) GetModelDeploymentMonitoringJob(ctx context.Context, req *aiplatformpb.GetModelDeploymentMonitoringJobRequest, opts ...gax.CallOption) (*aiplatformpb.ModelDeploymentMonitoringJob, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetModelDeploymentMonitoringJob[0:len((*c.CallOptions).GetModelDeploymentMonitoringJob):len((*c.CallOptions).GetModelDeploymentMonitoringJob)], opts...)
 	var resp *aiplatformpb.ModelDeploymentMonitoringJob
@@ -1005,6 +1028,7 @@
 
 func (c *jobGRPCClient) ListModelDeploymentMonitoringJobs(ctx context.Context, req *aiplatformpb.ListModelDeploymentMonitoringJobsRequest, opts ...gax.CallOption) *ModelDeploymentMonitoringJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListModelDeploymentMonitoringJobs[0:len((*c.CallOptions).ListModelDeploymentMonitoringJobs):len((*c.CallOptions).ListModelDeploymentMonitoringJobs)], opts...)
 	it := &ModelDeploymentMonitoringJobIterator{}
@@ -1049,6 +1073,7 @@
 
 func (c *jobGRPCClient) UpdateModelDeploymentMonitoringJob(ctx context.Context, req *aiplatformpb.UpdateModelDeploymentMonitoringJobRequest, opts ...gax.CallOption) (*UpdateModelDeploymentMonitoringJobOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "model_deployment_monitoring_job.name", url.QueryEscape(req.GetModelDeploymentMonitoringJob().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateModelDeploymentMonitoringJob[0:len((*c.CallOptions).UpdateModelDeploymentMonitoringJob):len((*c.CallOptions).UpdateModelDeploymentMonitoringJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -1067,6 +1092,7 @@
 
 func (c *jobGRPCClient) DeleteModelDeploymentMonitoringJob(ctx context.Context, req *aiplatformpb.DeleteModelDeploymentMonitoringJobRequest, opts ...gax.CallOption) (*DeleteModelDeploymentMonitoringJobOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteModelDeploymentMonitoringJob[0:len((*c.CallOptions).DeleteModelDeploymentMonitoringJob):len((*c.CallOptions).DeleteModelDeploymentMonitoringJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -1085,6 +1111,7 @@
 
 func (c *jobGRPCClient) PauseModelDeploymentMonitoringJob(ctx context.Context, req *aiplatformpb.PauseModelDeploymentMonitoringJobRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PauseModelDeploymentMonitoringJob[0:len((*c.CallOptions).PauseModelDeploymentMonitoringJob):len((*c.CallOptions).PauseModelDeploymentMonitoringJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1097,6 +1124,7 @@
 
 func (c *jobGRPCClient) ResumeModelDeploymentMonitoringJob(ctx context.Context, req *aiplatformpb.ResumeModelDeploymentMonitoringJobRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResumeModelDeploymentMonitoringJob[0:len((*c.CallOptions).ResumeModelDeploymentMonitoringJob):len((*c.CallOptions).ResumeModelDeploymentMonitoringJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/aiplatform/apiv1/metadata_client.go b/aiplatform/apiv1/metadata_client.go
index 618544f..3693e42 100644
--- a/aiplatform/apiv1/metadata_client.go
+++ b/aiplatform/apiv1/metadata_client.go
@@ -510,7 +510,7 @@
 // use by Google-written clients.
 func (c *metadataGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -522,6 +522,7 @@
 
 func (c *metadataGRPCClient) CreateMetadataStore(ctx context.Context, req *aiplatformpb.CreateMetadataStoreRequest, opts ...gax.CallOption) (*CreateMetadataStoreOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMetadataStore[0:len((*c.CallOptions).CreateMetadataStore):len((*c.CallOptions).CreateMetadataStore)], opts...)
 	var resp *longrunningpb.Operation
@@ -540,6 +541,7 @@
 
 func (c *metadataGRPCClient) GetMetadataStore(ctx context.Context, req *aiplatformpb.GetMetadataStoreRequest, opts ...gax.CallOption) (*aiplatformpb.MetadataStore, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMetadataStore[0:len((*c.CallOptions).GetMetadataStore):len((*c.CallOptions).GetMetadataStore)], opts...)
 	var resp *aiplatformpb.MetadataStore
@@ -556,6 +558,7 @@
 
 func (c *metadataGRPCClient) ListMetadataStores(ctx context.Context, req *aiplatformpb.ListMetadataStoresRequest, opts ...gax.CallOption) *MetadataStoreIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMetadataStores[0:len((*c.CallOptions).ListMetadataStores):len((*c.CallOptions).ListMetadataStores)], opts...)
 	it := &MetadataStoreIterator{}
@@ -600,6 +603,7 @@
 
 func (c *metadataGRPCClient) DeleteMetadataStore(ctx context.Context, req *aiplatformpb.DeleteMetadataStoreRequest, opts ...gax.CallOption) (*DeleteMetadataStoreOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteMetadataStore[0:len((*c.CallOptions).DeleteMetadataStore):len((*c.CallOptions).DeleteMetadataStore)], opts...)
 	var resp *longrunningpb.Operation
@@ -618,6 +622,7 @@
 
 func (c *metadataGRPCClient) CreateArtifact(ctx context.Context, req *aiplatformpb.CreateArtifactRequest, opts ...gax.CallOption) (*aiplatformpb.Artifact, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateArtifact[0:len((*c.CallOptions).CreateArtifact):len((*c.CallOptions).CreateArtifact)], opts...)
 	var resp *aiplatformpb.Artifact
@@ -634,6 +639,7 @@
 
 func (c *metadataGRPCClient) GetArtifact(ctx context.Context, req *aiplatformpb.GetArtifactRequest, opts ...gax.CallOption) (*aiplatformpb.Artifact, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetArtifact[0:len((*c.CallOptions).GetArtifact):len((*c.CallOptions).GetArtifact)], opts...)
 	var resp *aiplatformpb.Artifact
@@ -650,6 +656,7 @@
 
 func (c *metadataGRPCClient) ListArtifacts(ctx context.Context, req *aiplatformpb.ListArtifactsRequest, opts ...gax.CallOption) *ArtifactIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListArtifacts[0:len((*c.CallOptions).ListArtifacts):len((*c.CallOptions).ListArtifacts)], opts...)
 	it := &ArtifactIterator{}
@@ -694,6 +701,7 @@
 
 func (c *metadataGRPCClient) UpdateArtifact(ctx context.Context, req *aiplatformpb.UpdateArtifactRequest, opts ...gax.CallOption) (*aiplatformpb.Artifact, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "artifact.name", url.QueryEscape(req.GetArtifact().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateArtifact[0:len((*c.CallOptions).UpdateArtifact):len((*c.CallOptions).UpdateArtifact)], opts...)
 	var resp *aiplatformpb.Artifact
@@ -710,6 +718,7 @@
 
 func (c *metadataGRPCClient) DeleteArtifact(ctx context.Context, req *aiplatformpb.DeleteArtifactRequest, opts ...gax.CallOption) (*DeleteArtifactOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteArtifact[0:len((*c.CallOptions).DeleteArtifact):len((*c.CallOptions).DeleteArtifact)], opts...)
 	var resp *longrunningpb.Operation
@@ -728,6 +737,7 @@
 
 func (c *metadataGRPCClient) PurgeArtifacts(ctx context.Context, req *aiplatformpb.PurgeArtifactsRequest, opts ...gax.CallOption) (*PurgeArtifactsOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PurgeArtifacts[0:len((*c.CallOptions).PurgeArtifacts):len((*c.CallOptions).PurgeArtifacts)], opts...)
 	var resp *longrunningpb.Operation
@@ -746,6 +756,7 @@
 
 func (c *metadataGRPCClient) CreateContext(ctx context.Context, req *aiplatformpb.CreateContextRequest, opts ...gax.CallOption) (*aiplatformpb.Context, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateContext[0:len((*c.CallOptions).CreateContext):len((*c.CallOptions).CreateContext)], opts...)
 	var resp *aiplatformpb.Context
@@ -762,6 +773,7 @@
 
 func (c *metadataGRPCClient) GetContext(ctx context.Context, req *aiplatformpb.GetContextRequest, opts ...gax.CallOption) (*aiplatformpb.Context, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetContext[0:len((*c.CallOptions).GetContext):len((*c.CallOptions).GetContext)], opts...)
 	var resp *aiplatformpb.Context
@@ -778,6 +790,7 @@
 
 func (c *metadataGRPCClient) ListContexts(ctx context.Context, req *aiplatformpb.ListContextsRequest, opts ...gax.CallOption) *ContextIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListContexts[0:len((*c.CallOptions).ListContexts):len((*c.CallOptions).ListContexts)], opts...)
 	it := &ContextIterator{}
@@ -822,6 +835,7 @@
 
 func (c *metadataGRPCClient) UpdateContext(ctx context.Context, req *aiplatformpb.UpdateContextRequest, opts ...gax.CallOption) (*aiplatformpb.Context, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "context.name", url.QueryEscape(req.GetContext().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateContext[0:len((*c.CallOptions).UpdateContext):len((*c.CallOptions).UpdateContext)], opts...)
 	var resp *aiplatformpb.Context
@@ -838,6 +852,7 @@
 
 func (c *metadataGRPCClient) DeleteContext(ctx context.Context, req *aiplatformpb.DeleteContextRequest, opts ...gax.CallOption) (*DeleteContextOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteContext[0:len((*c.CallOptions).DeleteContext):len((*c.CallOptions).DeleteContext)], opts...)
 	var resp *longrunningpb.Operation
@@ -856,6 +871,7 @@
 
 func (c *metadataGRPCClient) PurgeContexts(ctx context.Context, req *aiplatformpb.PurgeContextsRequest, opts ...gax.CallOption) (*PurgeContextsOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PurgeContexts[0:len((*c.CallOptions).PurgeContexts):len((*c.CallOptions).PurgeContexts)], opts...)
 	var resp *longrunningpb.Operation
@@ -874,6 +890,7 @@
 
 func (c *metadataGRPCClient) AddContextArtifactsAndExecutions(ctx context.Context, req *aiplatformpb.AddContextArtifactsAndExecutionsRequest, opts ...gax.CallOption) (*aiplatformpb.AddContextArtifactsAndExecutionsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "context", url.QueryEscape(req.GetContext())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AddContextArtifactsAndExecutions[0:len((*c.CallOptions).AddContextArtifactsAndExecutions):len((*c.CallOptions).AddContextArtifactsAndExecutions)], opts...)
 	var resp *aiplatformpb.AddContextArtifactsAndExecutionsResponse
@@ -890,6 +907,7 @@
 
 func (c *metadataGRPCClient) AddContextChildren(ctx context.Context, req *aiplatformpb.AddContextChildrenRequest, opts ...gax.CallOption) (*aiplatformpb.AddContextChildrenResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "context", url.QueryEscape(req.GetContext())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AddContextChildren[0:len((*c.CallOptions).AddContextChildren):len((*c.CallOptions).AddContextChildren)], opts...)
 	var resp *aiplatformpb.AddContextChildrenResponse
@@ -906,6 +924,7 @@
 
 func (c *metadataGRPCClient) QueryContextLineageSubgraph(ctx context.Context, req *aiplatformpb.QueryContextLineageSubgraphRequest, opts ...gax.CallOption) (*aiplatformpb.LineageSubgraph, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "context", url.QueryEscape(req.GetContext())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).QueryContextLineageSubgraph[0:len((*c.CallOptions).QueryContextLineageSubgraph):len((*c.CallOptions).QueryContextLineageSubgraph)], opts...)
 	var resp *aiplatformpb.LineageSubgraph
@@ -922,6 +941,7 @@
 
 func (c *metadataGRPCClient) CreateExecution(ctx context.Context, req *aiplatformpb.CreateExecutionRequest, opts ...gax.CallOption) (*aiplatformpb.Execution, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateExecution[0:len((*c.CallOptions).CreateExecution):len((*c.CallOptions).CreateExecution)], opts...)
 	var resp *aiplatformpb.Execution
@@ -938,6 +958,7 @@
 
 func (c *metadataGRPCClient) GetExecution(ctx context.Context, req *aiplatformpb.GetExecutionRequest, opts ...gax.CallOption) (*aiplatformpb.Execution, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetExecution[0:len((*c.CallOptions).GetExecution):len((*c.CallOptions).GetExecution)], opts...)
 	var resp *aiplatformpb.Execution
@@ -954,6 +975,7 @@
 
 func (c *metadataGRPCClient) ListExecutions(ctx context.Context, req *aiplatformpb.ListExecutionsRequest, opts ...gax.CallOption) *ExecutionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListExecutions[0:len((*c.CallOptions).ListExecutions):len((*c.CallOptions).ListExecutions)], opts...)
 	it := &ExecutionIterator{}
@@ -998,6 +1020,7 @@
 
 func (c *metadataGRPCClient) UpdateExecution(ctx context.Context, req *aiplatformpb.UpdateExecutionRequest, opts ...gax.CallOption) (*aiplatformpb.Execution, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "execution.name", url.QueryEscape(req.GetExecution().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateExecution[0:len((*c.CallOptions).UpdateExecution):len((*c.CallOptions).UpdateExecution)], opts...)
 	var resp *aiplatformpb.Execution
@@ -1014,6 +1037,7 @@
 
 func (c *metadataGRPCClient) DeleteExecution(ctx context.Context, req *aiplatformpb.DeleteExecutionRequest, opts ...gax.CallOption) (*DeleteExecutionOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteExecution[0:len((*c.CallOptions).DeleteExecution):len((*c.CallOptions).DeleteExecution)], opts...)
 	var resp *longrunningpb.Operation
@@ -1032,6 +1056,7 @@
 
 func (c *metadataGRPCClient) PurgeExecutions(ctx context.Context, req *aiplatformpb.PurgeExecutionsRequest, opts ...gax.CallOption) (*PurgeExecutionsOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PurgeExecutions[0:len((*c.CallOptions).PurgeExecutions):len((*c.CallOptions).PurgeExecutions)], opts...)
 	var resp *longrunningpb.Operation
@@ -1050,6 +1075,7 @@
 
 func (c *metadataGRPCClient) AddExecutionEvents(ctx context.Context, req *aiplatformpb.AddExecutionEventsRequest, opts ...gax.CallOption) (*aiplatformpb.AddExecutionEventsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "execution", url.QueryEscape(req.GetExecution())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AddExecutionEvents[0:len((*c.CallOptions).AddExecutionEvents):len((*c.CallOptions).AddExecutionEvents)], opts...)
 	var resp *aiplatformpb.AddExecutionEventsResponse
@@ -1066,6 +1092,7 @@
 
 func (c *metadataGRPCClient) QueryExecutionInputsAndOutputs(ctx context.Context, req *aiplatformpb.QueryExecutionInputsAndOutputsRequest, opts ...gax.CallOption) (*aiplatformpb.LineageSubgraph, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "execution", url.QueryEscape(req.GetExecution())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).QueryExecutionInputsAndOutputs[0:len((*c.CallOptions).QueryExecutionInputsAndOutputs):len((*c.CallOptions).QueryExecutionInputsAndOutputs)], opts...)
 	var resp *aiplatformpb.LineageSubgraph
@@ -1082,6 +1109,7 @@
 
 func (c *metadataGRPCClient) CreateMetadataSchema(ctx context.Context, req *aiplatformpb.CreateMetadataSchemaRequest, opts ...gax.CallOption) (*aiplatformpb.MetadataSchema, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMetadataSchema[0:len((*c.CallOptions).CreateMetadataSchema):len((*c.CallOptions).CreateMetadataSchema)], opts...)
 	var resp *aiplatformpb.MetadataSchema
@@ -1098,6 +1126,7 @@
 
 func (c *metadataGRPCClient) GetMetadataSchema(ctx context.Context, req *aiplatformpb.GetMetadataSchemaRequest, opts ...gax.CallOption) (*aiplatformpb.MetadataSchema, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMetadataSchema[0:len((*c.CallOptions).GetMetadataSchema):len((*c.CallOptions).GetMetadataSchema)], opts...)
 	var resp *aiplatformpb.MetadataSchema
@@ -1114,6 +1143,7 @@
 
 func (c *metadataGRPCClient) ListMetadataSchemas(ctx context.Context, req *aiplatformpb.ListMetadataSchemasRequest, opts ...gax.CallOption) *MetadataSchemaIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMetadataSchemas[0:len((*c.CallOptions).ListMetadataSchemas):len((*c.CallOptions).ListMetadataSchemas)], opts...)
 	it := &MetadataSchemaIterator{}
@@ -1158,6 +1188,7 @@
 
 func (c *metadataGRPCClient) QueryArtifactLineageSubgraph(ctx context.Context, req *aiplatformpb.QueryArtifactLineageSubgraphRequest, opts ...gax.CallOption) (*aiplatformpb.LineageSubgraph, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "artifact", url.QueryEscape(req.GetArtifact())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).QueryArtifactLineageSubgraph[0:len((*c.CallOptions).QueryArtifactLineageSubgraph):len((*c.CallOptions).QueryArtifactLineageSubgraph)], opts...)
 	var resp *aiplatformpb.LineageSubgraph
diff --git a/aiplatform/apiv1/migration_client.go b/aiplatform/apiv1/migration_client.go
index b474743..be43296 100644
--- a/aiplatform/apiv1/migration_client.go
+++ b/aiplatform/apiv1/migration_client.go
@@ -220,7 +220,7 @@
 // use by Google-written clients.
 func (c *migrationGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -232,6 +232,7 @@
 
 func (c *migrationGRPCClient) SearchMigratableResources(ctx context.Context, req *aiplatformpb.SearchMigratableResourcesRequest, opts ...gax.CallOption) *MigratableResourceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchMigratableResources[0:len((*c.CallOptions).SearchMigratableResources):len((*c.CallOptions).SearchMigratableResources)], opts...)
 	it := &MigratableResourceIterator{}
@@ -276,6 +277,7 @@
 
 func (c *migrationGRPCClient) BatchMigrateResources(ctx context.Context, req *aiplatformpb.BatchMigrateResourcesRequest, opts ...gax.CallOption) (*BatchMigrateResourcesOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchMigrateResources[0:len((*c.CallOptions).BatchMigrateResources):len((*c.CallOptions).BatchMigrateResources)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/aiplatform/apiv1/model_client.go b/aiplatform/apiv1/model_client.go
index 1704907..be13190 100644
--- a/aiplatform/apiv1/model_client.go
+++ b/aiplatform/apiv1/model_client.go
@@ -299,7 +299,7 @@
 // use by Google-written clients.
 func (c *modelGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -311,6 +311,7 @@
 
 func (c *modelGRPCClient) UploadModel(ctx context.Context, req *aiplatformpb.UploadModelRequest, opts ...gax.CallOption) (*UploadModelOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UploadModel[0:len((*c.CallOptions).UploadModel):len((*c.CallOptions).UploadModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -329,6 +330,7 @@
 
 func (c *modelGRPCClient) GetModel(ctx context.Context, req *aiplatformpb.GetModelRequest, opts ...gax.CallOption) (*aiplatformpb.Model, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetModel[0:len((*c.CallOptions).GetModel):len((*c.CallOptions).GetModel)], opts...)
 	var resp *aiplatformpb.Model
@@ -345,6 +347,7 @@
 
 func (c *modelGRPCClient) ListModels(ctx context.Context, req *aiplatformpb.ListModelsRequest, opts ...gax.CallOption) *ModelIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListModels[0:len((*c.CallOptions).ListModels):len((*c.CallOptions).ListModels)], opts...)
 	it := &ModelIterator{}
@@ -389,6 +392,7 @@
 
 func (c *modelGRPCClient) UpdateModel(ctx context.Context, req *aiplatformpb.UpdateModelRequest, opts ...gax.CallOption) (*aiplatformpb.Model, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "model.name", url.QueryEscape(req.GetModel().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateModel[0:len((*c.CallOptions).UpdateModel):len((*c.CallOptions).UpdateModel)], opts...)
 	var resp *aiplatformpb.Model
@@ -405,6 +409,7 @@
 
 func (c *modelGRPCClient) DeleteModel(ctx context.Context, req *aiplatformpb.DeleteModelRequest, opts ...gax.CallOption) (*DeleteModelOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteModel[0:len((*c.CallOptions).DeleteModel):len((*c.CallOptions).DeleteModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -423,6 +428,7 @@
 
 func (c *modelGRPCClient) ExportModel(ctx context.Context, req *aiplatformpb.ExportModelRequest, opts ...gax.CallOption) (*ExportModelOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportModel[0:len((*c.CallOptions).ExportModel):len((*c.CallOptions).ExportModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -441,6 +447,7 @@
 
 func (c *modelGRPCClient) GetModelEvaluation(ctx context.Context, req *aiplatformpb.GetModelEvaluationRequest, opts ...gax.CallOption) (*aiplatformpb.ModelEvaluation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetModelEvaluation[0:len((*c.CallOptions).GetModelEvaluation):len((*c.CallOptions).GetModelEvaluation)], opts...)
 	var resp *aiplatformpb.ModelEvaluation
@@ -457,6 +464,7 @@
 
 func (c *modelGRPCClient) ListModelEvaluations(ctx context.Context, req *aiplatformpb.ListModelEvaluationsRequest, opts ...gax.CallOption) *ModelEvaluationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListModelEvaluations[0:len((*c.CallOptions).ListModelEvaluations):len((*c.CallOptions).ListModelEvaluations)], opts...)
 	it := &ModelEvaluationIterator{}
@@ -501,6 +509,7 @@
 
 func (c *modelGRPCClient) GetModelEvaluationSlice(ctx context.Context, req *aiplatformpb.GetModelEvaluationSliceRequest, opts ...gax.CallOption) (*aiplatformpb.ModelEvaluationSlice, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetModelEvaluationSlice[0:len((*c.CallOptions).GetModelEvaluationSlice):len((*c.CallOptions).GetModelEvaluationSlice)], opts...)
 	var resp *aiplatformpb.ModelEvaluationSlice
@@ -517,6 +526,7 @@
 
 func (c *modelGRPCClient) ListModelEvaluationSlices(ctx context.Context, req *aiplatformpb.ListModelEvaluationSlicesRequest, opts ...gax.CallOption) *ModelEvaluationSliceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListModelEvaluationSlices[0:len((*c.CallOptions).ListModelEvaluationSlices):len((*c.CallOptions).ListModelEvaluationSlices)], opts...)
 	it := &ModelEvaluationSliceIterator{}
diff --git a/aiplatform/apiv1/pipeline_client.go b/aiplatform/apiv1/pipeline_client.go
index 01ca662..27cdeff 100644
--- a/aiplatform/apiv1/pipeline_client.go
+++ b/aiplatform/apiv1/pipeline_client.go
@@ -309,7 +309,7 @@
 // use by Google-written clients.
 func (c *pipelineGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -321,6 +321,7 @@
 
 func (c *pipelineGRPCClient) CreateTrainingPipeline(ctx context.Context, req *aiplatformpb.CreateTrainingPipelineRequest, opts ...gax.CallOption) (*aiplatformpb.TrainingPipeline, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTrainingPipeline[0:len((*c.CallOptions).CreateTrainingPipeline):len((*c.CallOptions).CreateTrainingPipeline)], opts...)
 	var resp *aiplatformpb.TrainingPipeline
@@ -337,6 +338,7 @@
 
 func (c *pipelineGRPCClient) GetTrainingPipeline(ctx context.Context, req *aiplatformpb.GetTrainingPipelineRequest, opts ...gax.CallOption) (*aiplatformpb.TrainingPipeline, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTrainingPipeline[0:len((*c.CallOptions).GetTrainingPipeline):len((*c.CallOptions).GetTrainingPipeline)], opts...)
 	var resp *aiplatformpb.TrainingPipeline
@@ -353,6 +355,7 @@
 
 func (c *pipelineGRPCClient) ListTrainingPipelines(ctx context.Context, req *aiplatformpb.ListTrainingPipelinesRequest, opts ...gax.CallOption) *TrainingPipelineIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTrainingPipelines[0:len((*c.CallOptions).ListTrainingPipelines):len((*c.CallOptions).ListTrainingPipelines)], opts...)
 	it := &TrainingPipelineIterator{}
@@ -397,6 +400,7 @@
 
 func (c *pipelineGRPCClient) DeleteTrainingPipeline(ctx context.Context, req *aiplatformpb.DeleteTrainingPipelineRequest, opts ...gax.CallOption) (*DeleteTrainingPipelineOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTrainingPipeline[0:len((*c.CallOptions).DeleteTrainingPipeline):len((*c.CallOptions).DeleteTrainingPipeline)], opts...)
 	var resp *longrunningpb.Operation
@@ -415,6 +419,7 @@
 
 func (c *pipelineGRPCClient) CancelTrainingPipeline(ctx context.Context, req *aiplatformpb.CancelTrainingPipelineRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelTrainingPipeline[0:len((*c.CallOptions).CancelTrainingPipeline):len((*c.CallOptions).CancelTrainingPipeline)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -427,6 +432,7 @@
 
 func (c *pipelineGRPCClient) CreatePipelineJob(ctx context.Context, req *aiplatformpb.CreatePipelineJobRequest, opts ...gax.CallOption) (*aiplatformpb.PipelineJob, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreatePipelineJob[0:len((*c.CallOptions).CreatePipelineJob):len((*c.CallOptions).CreatePipelineJob)], opts...)
 	var resp *aiplatformpb.PipelineJob
@@ -443,6 +449,7 @@
 
 func (c *pipelineGRPCClient) GetPipelineJob(ctx context.Context, req *aiplatformpb.GetPipelineJobRequest, opts ...gax.CallOption) (*aiplatformpb.PipelineJob, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPipelineJob[0:len((*c.CallOptions).GetPipelineJob):len((*c.CallOptions).GetPipelineJob)], opts...)
 	var resp *aiplatformpb.PipelineJob
@@ -459,6 +466,7 @@
 
 func (c *pipelineGRPCClient) ListPipelineJobs(ctx context.Context, req *aiplatformpb.ListPipelineJobsRequest, opts ...gax.CallOption) *PipelineJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPipelineJobs[0:len((*c.CallOptions).ListPipelineJobs):len((*c.CallOptions).ListPipelineJobs)], opts...)
 	it := &PipelineJobIterator{}
@@ -503,6 +511,7 @@
 
 func (c *pipelineGRPCClient) DeletePipelineJob(ctx context.Context, req *aiplatformpb.DeletePipelineJobRequest, opts ...gax.CallOption) (*DeletePipelineJobOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePipelineJob[0:len((*c.CallOptions).DeletePipelineJob):len((*c.CallOptions).DeletePipelineJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -521,6 +530,7 @@
 
 func (c *pipelineGRPCClient) CancelPipelineJob(ctx context.Context, req *aiplatformpb.CancelPipelineJobRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelPipelineJob[0:len((*c.CallOptions).CancelPipelineJob):len((*c.CallOptions).CancelPipelineJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/aiplatform/apiv1/prediction_client.go b/aiplatform/apiv1/prediction_client.go
index 0b8e7b4..975c676 100644
--- a/aiplatform/apiv1/prediction_client.go
+++ b/aiplatform/apiv1/prediction_client.go
@@ -207,7 +207,7 @@
 // use by Google-written clients.
 func (c *predictionGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -219,6 +219,7 @@
 
 func (c *predictionGRPCClient) Predict(ctx context.Context, req *aiplatformpb.PredictRequest, opts ...gax.CallOption) (*aiplatformpb.PredictResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Predict[0:len((*c.CallOptions).Predict):len((*c.CallOptions).Predict)], opts...)
 	var resp *aiplatformpb.PredictResponse
@@ -235,6 +236,7 @@
 
 func (c *predictionGRPCClient) RawPredict(ctx context.Context, req *aiplatformpb.RawPredictRequest, opts ...gax.CallOption) (*httpbodypb.HttpBody, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RawPredict[0:len((*c.CallOptions).RawPredict):len((*c.CallOptions).RawPredict)], opts...)
 	var resp *httpbodypb.HttpBody
@@ -251,6 +253,7 @@
 
 func (c *predictionGRPCClient) Explain(ctx context.Context, req *aiplatformpb.ExplainRequest, opts ...gax.CallOption) (*aiplatformpb.ExplainResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Explain[0:len((*c.CallOptions).Explain):len((*c.CallOptions).Explain)], opts...)
 	var resp *aiplatformpb.ExplainResponse
diff --git a/aiplatform/apiv1/specialist_pool_client.go b/aiplatform/apiv1/specialist_pool_client.go
index ecd9b82..d1fb29d 100644
--- a/aiplatform/apiv1/specialist_pool_client.go
+++ b/aiplatform/apiv1/specialist_pool_client.go
@@ -263,7 +263,7 @@
 // use by Google-written clients.
 func (c *specialistPoolGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -275,6 +275,7 @@
 
 func (c *specialistPoolGRPCClient) CreateSpecialistPool(ctx context.Context, req *aiplatformpb.CreateSpecialistPoolRequest, opts ...gax.CallOption) (*CreateSpecialistPoolOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSpecialistPool[0:len((*c.CallOptions).CreateSpecialistPool):len((*c.CallOptions).CreateSpecialistPool)], opts...)
 	var resp *longrunningpb.Operation
@@ -293,6 +294,7 @@
 
 func (c *specialistPoolGRPCClient) GetSpecialistPool(ctx context.Context, req *aiplatformpb.GetSpecialistPoolRequest, opts ...gax.CallOption) (*aiplatformpb.SpecialistPool, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSpecialistPool[0:len((*c.CallOptions).GetSpecialistPool):len((*c.CallOptions).GetSpecialistPool)], opts...)
 	var resp *aiplatformpb.SpecialistPool
@@ -309,6 +311,7 @@
 
 func (c *specialistPoolGRPCClient) ListSpecialistPools(ctx context.Context, req *aiplatformpb.ListSpecialistPoolsRequest, opts ...gax.CallOption) *SpecialistPoolIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSpecialistPools[0:len((*c.CallOptions).ListSpecialistPools):len((*c.CallOptions).ListSpecialistPools)], opts...)
 	it := &SpecialistPoolIterator{}
@@ -353,6 +356,7 @@
 
 func (c *specialistPoolGRPCClient) DeleteSpecialistPool(ctx context.Context, req *aiplatformpb.DeleteSpecialistPoolRequest, opts ...gax.CallOption) (*DeleteSpecialistPoolOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSpecialistPool[0:len((*c.CallOptions).DeleteSpecialistPool):len((*c.CallOptions).DeleteSpecialistPool)], opts...)
 	var resp *longrunningpb.Operation
@@ -371,6 +375,7 @@
 
 func (c *specialistPoolGRPCClient) UpdateSpecialistPool(ctx context.Context, req *aiplatformpb.UpdateSpecialistPoolRequest, opts ...gax.CallOption) (*UpdateSpecialistPoolOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "specialist_pool.name", url.QueryEscape(req.GetSpecialistPool().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSpecialistPool[0:len((*c.CallOptions).UpdateSpecialistPool):len((*c.CallOptions).UpdateSpecialistPool)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/aiplatform/apiv1/tensorboard_client.go b/aiplatform/apiv1/tensorboard_client.go
index 761ab5d..ece0843 100644
--- a/aiplatform/apiv1/tensorboard_client.go
+++ b/aiplatform/apiv1/tensorboard_client.go
@@ -474,7 +474,7 @@
 // use by Google-written clients.
 func (c *tensorboardGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -486,6 +486,7 @@
 
 func (c *tensorboardGRPCClient) CreateTensorboard(ctx context.Context, req *aiplatformpb.CreateTensorboardRequest, opts ...gax.CallOption) (*CreateTensorboardOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTensorboard[0:len((*c.CallOptions).CreateTensorboard):len((*c.CallOptions).CreateTensorboard)], opts...)
 	var resp *longrunningpb.Operation
@@ -504,6 +505,7 @@
 
 func (c *tensorboardGRPCClient) GetTensorboard(ctx context.Context, req *aiplatformpb.GetTensorboardRequest, opts ...gax.CallOption) (*aiplatformpb.Tensorboard, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTensorboard[0:len((*c.CallOptions).GetTensorboard):len((*c.CallOptions).GetTensorboard)], opts...)
 	var resp *aiplatformpb.Tensorboard
@@ -520,6 +522,7 @@
 
 func (c *tensorboardGRPCClient) UpdateTensorboard(ctx context.Context, req *aiplatformpb.UpdateTensorboardRequest, opts ...gax.CallOption) (*UpdateTensorboardOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tensorboard.name", url.QueryEscape(req.GetTensorboard().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTensorboard[0:len((*c.CallOptions).UpdateTensorboard):len((*c.CallOptions).UpdateTensorboard)], opts...)
 	var resp *longrunningpb.Operation
@@ -538,6 +541,7 @@
 
 func (c *tensorboardGRPCClient) ListTensorboards(ctx context.Context, req *aiplatformpb.ListTensorboardsRequest, opts ...gax.CallOption) *TensorboardIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTensorboards[0:len((*c.CallOptions).ListTensorboards):len((*c.CallOptions).ListTensorboards)], opts...)
 	it := &TensorboardIterator{}
@@ -582,6 +586,7 @@
 
 func (c *tensorboardGRPCClient) DeleteTensorboard(ctx context.Context, req *aiplatformpb.DeleteTensorboardRequest, opts ...gax.CallOption) (*DeleteTensorboardOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTensorboard[0:len((*c.CallOptions).DeleteTensorboard):len((*c.CallOptions).DeleteTensorboard)], opts...)
 	var resp *longrunningpb.Operation
@@ -600,6 +605,7 @@
 
 func (c *tensorboardGRPCClient) CreateTensorboardExperiment(ctx context.Context, req *aiplatformpb.CreateTensorboardExperimentRequest, opts ...gax.CallOption) (*aiplatformpb.TensorboardExperiment, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTensorboardExperiment[0:len((*c.CallOptions).CreateTensorboardExperiment):len((*c.CallOptions).CreateTensorboardExperiment)], opts...)
 	var resp *aiplatformpb.TensorboardExperiment
@@ -616,6 +622,7 @@
 
 func (c *tensorboardGRPCClient) GetTensorboardExperiment(ctx context.Context, req *aiplatformpb.GetTensorboardExperimentRequest, opts ...gax.CallOption) (*aiplatformpb.TensorboardExperiment, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTensorboardExperiment[0:len((*c.CallOptions).GetTensorboardExperiment):len((*c.CallOptions).GetTensorboardExperiment)], opts...)
 	var resp *aiplatformpb.TensorboardExperiment
@@ -632,6 +639,7 @@
 
 func (c *tensorboardGRPCClient) UpdateTensorboardExperiment(ctx context.Context, req *aiplatformpb.UpdateTensorboardExperimentRequest, opts ...gax.CallOption) (*aiplatformpb.TensorboardExperiment, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tensorboard_experiment.name", url.QueryEscape(req.GetTensorboardExperiment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTensorboardExperiment[0:len((*c.CallOptions).UpdateTensorboardExperiment):len((*c.CallOptions).UpdateTensorboardExperiment)], opts...)
 	var resp *aiplatformpb.TensorboardExperiment
@@ -648,6 +656,7 @@
 
 func (c *tensorboardGRPCClient) ListTensorboardExperiments(ctx context.Context, req *aiplatformpb.ListTensorboardExperimentsRequest, opts ...gax.CallOption) *TensorboardExperimentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTensorboardExperiments[0:len((*c.CallOptions).ListTensorboardExperiments):len((*c.CallOptions).ListTensorboardExperiments)], opts...)
 	it := &TensorboardExperimentIterator{}
@@ -692,6 +701,7 @@
 
 func (c *tensorboardGRPCClient) DeleteTensorboardExperiment(ctx context.Context, req *aiplatformpb.DeleteTensorboardExperimentRequest, opts ...gax.CallOption) (*DeleteTensorboardExperimentOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTensorboardExperiment[0:len((*c.CallOptions).DeleteTensorboardExperiment):len((*c.CallOptions).DeleteTensorboardExperiment)], opts...)
 	var resp *longrunningpb.Operation
@@ -710,6 +720,7 @@
 
 func (c *tensorboardGRPCClient) CreateTensorboardRun(ctx context.Context, req *aiplatformpb.CreateTensorboardRunRequest, opts ...gax.CallOption) (*aiplatformpb.TensorboardRun, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTensorboardRun[0:len((*c.CallOptions).CreateTensorboardRun):len((*c.CallOptions).CreateTensorboardRun)], opts...)
 	var resp *aiplatformpb.TensorboardRun
@@ -726,6 +737,7 @@
 
 func (c *tensorboardGRPCClient) BatchCreateTensorboardRuns(ctx context.Context, req *aiplatformpb.BatchCreateTensorboardRunsRequest, opts ...gax.CallOption) (*aiplatformpb.BatchCreateTensorboardRunsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCreateTensorboardRuns[0:len((*c.CallOptions).BatchCreateTensorboardRuns):len((*c.CallOptions).BatchCreateTensorboardRuns)], opts...)
 	var resp *aiplatformpb.BatchCreateTensorboardRunsResponse
@@ -742,6 +754,7 @@
 
 func (c *tensorboardGRPCClient) GetTensorboardRun(ctx context.Context, req *aiplatformpb.GetTensorboardRunRequest, opts ...gax.CallOption) (*aiplatformpb.TensorboardRun, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTensorboardRun[0:len((*c.CallOptions).GetTensorboardRun):len((*c.CallOptions).GetTensorboardRun)], opts...)
 	var resp *aiplatformpb.TensorboardRun
@@ -758,6 +771,7 @@
 
 func (c *tensorboardGRPCClient) UpdateTensorboardRun(ctx context.Context, req *aiplatformpb.UpdateTensorboardRunRequest, opts ...gax.CallOption) (*aiplatformpb.TensorboardRun, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tensorboard_run.name", url.QueryEscape(req.GetTensorboardRun().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTensorboardRun[0:len((*c.CallOptions).UpdateTensorboardRun):len((*c.CallOptions).UpdateTensorboardRun)], opts...)
 	var resp *aiplatformpb.TensorboardRun
@@ -774,6 +788,7 @@
 
 func (c *tensorboardGRPCClient) ListTensorboardRuns(ctx context.Context, req *aiplatformpb.ListTensorboardRunsRequest, opts ...gax.CallOption) *TensorboardRunIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTensorboardRuns[0:len((*c.CallOptions).ListTensorboardRuns):len((*c.CallOptions).ListTensorboardRuns)], opts...)
 	it := &TensorboardRunIterator{}
@@ -818,6 +833,7 @@
 
 func (c *tensorboardGRPCClient) DeleteTensorboardRun(ctx context.Context, req *aiplatformpb.DeleteTensorboardRunRequest, opts ...gax.CallOption) (*DeleteTensorboardRunOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTensorboardRun[0:len((*c.CallOptions).DeleteTensorboardRun):len((*c.CallOptions).DeleteTensorboardRun)], opts...)
 	var resp *longrunningpb.Operation
@@ -836,6 +852,7 @@
 
 func (c *tensorboardGRPCClient) BatchCreateTensorboardTimeSeries(ctx context.Context, req *aiplatformpb.BatchCreateTensorboardTimeSeriesRequest, opts ...gax.CallOption) (*aiplatformpb.BatchCreateTensorboardTimeSeriesResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCreateTensorboardTimeSeries[0:len((*c.CallOptions).BatchCreateTensorboardTimeSeries):len((*c.CallOptions).BatchCreateTensorboardTimeSeries)], opts...)
 	var resp *aiplatformpb.BatchCreateTensorboardTimeSeriesResponse
@@ -852,6 +869,7 @@
 
 func (c *tensorboardGRPCClient) CreateTensorboardTimeSeries(ctx context.Context, req *aiplatformpb.CreateTensorboardTimeSeriesRequest, opts ...gax.CallOption) (*aiplatformpb.TensorboardTimeSeries, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTensorboardTimeSeries[0:len((*c.CallOptions).CreateTensorboardTimeSeries):len((*c.CallOptions).CreateTensorboardTimeSeries)], opts...)
 	var resp *aiplatformpb.TensorboardTimeSeries
@@ -868,6 +886,7 @@
 
 func (c *tensorboardGRPCClient) GetTensorboardTimeSeries(ctx context.Context, req *aiplatformpb.GetTensorboardTimeSeriesRequest, opts ...gax.CallOption) (*aiplatformpb.TensorboardTimeSeries, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTensorboardTimeSeries[0:len((*c.CallOptions).GetTensorboardTimeSeries):len((*c.CallOptions).GetTensorboardTimeSeries)], opts...)
 	var resp *aiplatformpb.TensorboardTimeSeries
@@ -884,6 +903,7 @@
 
 func (c *tensorboardGRPCClient) UpdateTensorboardTimeSeries(ctx context.Context, req *aiplatformpb.UpdateTensorboardTimeSeriesRequest, opts ...gax.CallOption) (*aiplatformpb.TensorboardTimeSeries, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tensorboard_time_series.name", url.QueryEscape(req.GetTensorboardTimeSeries().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTensorboardTimeSeries[0:len((*c.CallOptions).UpdateTensorboardTimeSeries):len((*c.CallOptions).UpdateTensorboardTimeSeries)], opts...)
 	var resp *aiplatformpb.TensorboardTimeSeries
@@ -900,6 +920,7 @@
 
 func (c *tensorboardGRPCClient) ListTensorboardTimeSeries(ctx context.Context, req *aiplatformpb.ListTensorboardTimeSeriesRequest, opts ...gax.CallOption) *TensorboardTimeSeriesIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTensorboardTimeSeries[0:len((*c.CallOptions).ListTensorboardTimeSeries):len((*c.CallOptions).ListTensorboardTimeSeries)], opts...)
 	it := &TensorboardTimeSeriesIterator{}
@@ -944,6 +965,7 @@
 
 func (c *tensorboardGRPCClient) DeleteTensorboardTimeSeries(ctx context.Context, req *aiplatformpb.DeleteTensorboardTimeSeriesRequest, opts ...gax.CallOption) (*DeleteTensorboardTimeSeriesOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTensorboardTimeSeries[0:len((*c.CallOptions).DeleteTensorboardTimeSeries):len((*c.CallOptions).DeleteTensorboardTimeSeries)], opts...)
 	var resp *longrunningpb.Operation
@@ -962,6 +984,7 @@
 
 func (c *tensorboardGRPCClient) BatchReadTensorboardTimeSeriesData(ctx context.Context, req *aiplatformpb.BatchReadTensorboardTimeSeriesDataRequest, opts ...gax.CallOption) (*aiplatformpb.BatchReadTensorboardTimeSeriesDataResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tensorboard", url.QueryEscape(req.GetTensorboard())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchReadTensorboardTimeSeriesData[0:len((*c.CallOptions).BatchReadTensorboardTimeSeriesData):len((*c.CallOptions).BatchReadTensorboardTimeSeriesData)], opts...)
 	var resp *aiplatformpb.BatchReadTensorboardTimeSeriesDataResponse
@@ -978,6 +1001,7 @@
 
 func (c *tensorboardGRPCClient) ReadTensorboardTimeSeriesData(ctx context.Context, req *aiplatformpb.ReadTensorboardTimeSeriesDataRequest, opts ...gax.CallOption) (*aiplatformpb.ReadTensorboardTimeSeriesDataResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tensorboard_time_series", url.QueryEscape(req.GetTensorboardTimeSeries())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReadTensorboardTimeSeriesData[0:len((*c.CallOptions).ReadTensorboardTimeSeriesData):len((*c.CallOptions).ReadTensorboardTimeSeriesData)], opts...)
 	var resp *aiplatformpb.ReadTensorboardTimeSeriesDataResponse
@@ -994,6 +1018,7 @@
 
 func (c *tensorboardGRPCClient) ReadTensorboardBlobData(ctx context.Context, req *aiplatformpb.ReadTensorboardBlobDataRequest, opts ...gax.CallOption) (aiplatformpb.TensorboardService_ReadTensorboardBlobDataClient, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "time_series", url.QueryEscape(req.GetTimeSeries())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	var resp aiplatformpb.TensorboardService_ReadTensorboardBlobDataClient
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1009,6 +1034,7 @@
 
 func (c *tensorboardGRPCClient) WriteTensorboardExperimentData(ctx context.Context, req *aiplatformpb.WriteTensorboardExperimentDataRequest, opts ...gax.CallOption) (*aiplatformpb.WriteTensorboardExperimentDataResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tensorboard_experiment", url.QueryEscape(req.GetTensorboardExperiment())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).WriteTensorboardExperimentData[0:len((*c.CallOptions).WriteTensorboardExperimentData):len((*c.CallOptions).WriteTensorboardExperimentData)], opts...)
 	var resp *aiplatformpb.WriteTensorboardExperimentDataResponse
@@ -1025,6 +1051,7 @@
 
 func (c *tensorboardGRPCClient) WriteTensorboardRunData(ctx context.Context, req *aiplatformpb.WriteTensorboardRunDataRequest, opts ...gax.CallOption) (*aiplatformpb.WriteTensorboardRunDataResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tensorboard_run", url.QueryEscape(req.GetTensorboardRun())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).WriteTensorboardRunData[0:len((*c.CallOptions).WriteTensorboardRunData):len((*c.CallOptions).WriteTensorboardRunData)], opts...)
 	var resp *aiplatformpb.WriteTensorboardRunDataResponse
@@ -1041,6 +1068,7 @@
 
 func (c *tensorboardGRPCClient) ExportTensorboardTimeSeriesData(ctx context.Context, req *aiplatformpb.ExportTensorboardTimeSeriesDataRequest, opts ...gax.CallOption) *TimeSeriesDataPointIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tensorboard_time_series", url.QueryEscape(req.GetTensorboardTimeSeries())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportTensorboardTimeSeriesData[0:len((*c.CallOptions).ExportTensorboardTimeSeriesData):len((*c.CallOptions).ExportTensorboardTimeSeriesData)], opts...)
 	it := &TimeSeriesDataPointIterator{}
diff --git a/aiplatform/apiv1/version.go b/aiplatform/apiv1/version.go
new file mode 100644
index 0000000..59ac061
--- /dev/null
+++ b/aiplatform/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package aiplatform
+
+import "cloud.google.com/go/aiplatform/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/aiplatform/apiv1/vizier_client.go b/aiplatform/apiv1/vizier_client.go
index 64b6ea3..57b9092 100644
--- a/aiplatform/apiv1/vizier_client.go
+++ b/aiplatform/apiv1/vizier_client.go
@@ -347,7 +347,7 @@
 // use by Google-written clients.
 func (c *vizierGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -359,6 +359,7 @@
 
 func (c *vizierGRPCClient) CreateStudy(ctx context.Context, req *aiplatformpb.CreateStudyRequest, opts ...gax.CallOption) (*aiplatformpb.Study, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateStudy[0:len((*c.CallOptions).CreateStudy):len((*c.CallOptions).CreateStudy)], opts...)
 	var resp *aiplatformpb.Study
@@ -375,6 +376,7 @@
 
 func (c *vizierGRPCClient) GetStudy(ctx context.Context, req *aiplatformpb.GetStudyRequest, opts ...gax.CallOption) (*aiplatformpb.Study, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetStudy[0:len((*c.CallOptions).GetStudy):len((*c.CallOptions).GetStudy)], opts...)
 	var resp *aiplatformpb.Study
@@ -391,6 +393,7 @@
 
 func (c *vizierGRPCClient) ListStudies(ctx context.Context, req *aiplatformpb.ListStudiesRequest, opts ...gax.CallOption) *StudyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListStudies[0:len((*c.CallOptions).ListStudies):len((*c.CallOptions).ListStudies)], opts...)
 	it := &StudyIterator{}
@@ -435,6 +438,7 @@
 
 func (c *vizierGRPCClient) DeleteStudy(ctx context.Context, req *aiplatformpb.DeleteStudyRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteStudy[0:len((*c.CallOptions).DeleteStudy):len((*c.CallOptions).DeleteStudy)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -447,6 +451,7 @@
 
 func (c *vizierGRPCClient) LookupStudy(ctx context.Context, req *aiplatformpb.LookupStudyRequest, opts ...gax.CallOption) (*aiplatformpb.Study, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LookupStudy[0:len((*c.CallOptions).LookupStudy):len((*c.CallOptions).LookupStudy)], opts...)
 	var resp *aiplatformpb.Study
@@ -463,6 +468,7 @@
 
 func (c *vizierGRPCClient) SuggestTrials(ctx context.Context, req *aiplatformpb.SuggestTrialsRequest, opts ...gax.CallOption) (*SuggestTrialsOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SuggestTrials[0:len((*c.CallOptions).SuggestTrials):len((*c.CallOptions).SuggestTrials)], opts...)
 	var resp *longrunningpb.Operation
@@ -481,6 +487,7 @@
 
 func (c *vizierGRPCClient) CreateTrial(ctx context.Context, req *aiplatformpb.CreateTrialRequest, opts ...gax.CallOption) (*aiplatformpb.Trial, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTrial[0:len((*c.CallOptions).CreateTrial):len((*c.CallOptions).CreateTrial)], opts...)
 	var resp *aiplatformpb.Trial
@@ -497,6 +504,7 @@
 
 func (c *vizierGRPCClient) GetTrial(ctx context.Context, req *aiplatformpb.GetTrialRequest, opts ...gax.CallOption) (*aiplatformpb.Trial, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTrial[0:len((*c.CallOptions).GetTrial):len((*c.CallOptions).GetTrial)], opts...)
 	var resp *aiplatformpb.Trial
@@ -513,6 +521,7 @@
 
 func (c *vizierGRPCClient) ListTrials(ctx context.Context, req *aiplatformpb.ListTrialsRequest, opts ...gax.CallOption) *TrialIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTrials[0:len((*c.CallOptions).ListTrials):len((*c.CallOptions).ListTrials)], opts...)
 	it := &TrialIterator{}
@@ -557,6 +566,7 @@
 
 func (c *vizierGRPCClient) AddTrialMeasurement(ctx context.Context, req *aiplatformpb.AddTrialMeasurementRequest, opts ...gax.CallOption) (*aiplatformpb.Trial, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "trial_name", url.QueryEscape(req.GetTrialName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AddTrialMeasurement[0:len((*c.CallOptions).AddTrialMeasurement):len((*c.CallOptions).AddTrialMeasurement)], opts...)
 	var resp *aiplatformpb.Trial
@@ -573,6 +583,7 @@
 
 func (c *vizierGRPCClient) CompleteTrial(ctx context.Context, req *aiplatformpb.CompleteTrialRequest, opts ...gax.CallOption) (*aiplatformpb.Trial, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CompleteTrial[0:len((*c.CallOptions).CompleteTrial):len((*c.CallOptions).CompleteTrial)], opts...)
 	var resp *aiplatformpb.Trial
@@ -589,6 +600,7 @@
 
 func (c *vizierGRPCClient) DeleteTrial(ctx context.Context, req *aiplatformpb.DeleteTrialRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTrial[0:len((*c.CallOptions).DeleteTrial):len((*c.CallOptions).DeleteTrial)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -601,6 +613,7 @@
 
 func (c *vizierGRPCClient) CheckTrialEarlyStoppingState(ctx context.Context, req *aiplatformpb.CheckTrialEarlyStoppingStateRequest, opts ...gax.CallOption) (*CheckTrialEarlyStoppingStateOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "trial_name", url.QueryEscape(req.GetTrialName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CheckTrialEarlyStoppingState[0:len((*c.CallOptions).CheckTrialEarlyStoppingState):len((*c.CallOptions).CheckTrialEarlyStoppingState)], opts...)
 	var resp *longrunningpb.Operation
@@ -619,6 +632,7 @@
 
 func (c *vizierGRPCClient) StopTrial(ctx context.Context, req *aiplatformpb.StopTrialRequest, opts ...gax.CallOption) (*aiplatformpb.Trial, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StopTrial[0:len((*c.CallOptions).StopTrial):len((*c.CallOptions).StopTrial)], opts...)
 	var resp *aiplatformpb.Trial
@@ -635,6 +649,7 @@
 
 func (c *vizierGRPCClient) ListOptimalTrials(ctx context.Context, req *aiplatformpb.ListOptimalTrialsRequest, opts ...gax.CallOption) (*aiplatformpb.ListOptimalTrialsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListOptimalTrials[0:len((*c.CallOptions).ListOptimalTrials):len((*c.CallOptions).ListOptimalTrials)], opts...)
 	var resp *aiplatformpb.ListOptimalTrialsResponse
diff --git a/analytics/admin/apiv1alpha/analytics_admin_client.go b/analytics/admin/apiv1alpha/analytics_admin_client.go
index c62a726..eecc45f 100644
--- a/analytics/admin/apiv1alpha/analytics_admin_client.go
+++ b/analytics/admin/apiv1alpha/analytics_admin_client.go
@@ -1403,7 +1403,7 @@
 // use by Google-written clients.
 func (c *analyticsAdminGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -1420,6 +1420,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAccount[0:len((*c.CallOptions).GetAccount):len((*c.CallOptions).GetAccount)], opts...)
 	var resp *adminpb.Account
@@ -1484,6 +1485,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAccount[0:len((*c.CallOptions).DeleteAccount):len((*c.CallOptions).DeleteAccount)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1501,6 +1503,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "account.name", url.QueryEscape(req.GetAccount().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAccount[0:len((*c.CallOptions).UpdateAccount):len((*c.CallOptions).UpdateAccount)], opts...)
 	var resp *adminpb.Account
@@ -1585,6 +1588,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetProperty[0:len((*c.CallOptions).GetProperty):len((*c.CallOptions).GetProperty)], opts...)
 	var resp *adminpb.Property
@@ -1669,6 +1673,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteProperty[0:len((*c.CallOptions).DeleteProperty):len((*c.CallOptions).DeleteProperty)], opts...)
 	var resp *adminpb.Property
@@ -1690,6 +1695,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "property.name", url.QueryEscape(req.GetProperty().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateProperty[0:len((*c.CallOptions).UpdateProperty):len((*c.CallOptions).UpdateProperty)], opts...)
 	var resp *adminpb.Property
@@ -1711,6 +1717,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetUserLink[0:len((*c.CallOptions).GetUserLink):len((*c.CallOptions).GetUserLink)], opts...)
 	var resp *adminpb.UserLink
@@ -1732,6 +1739,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchGetUserLinks[0:len((*c.CallOptions).BatchGetUserLinks):len((*c.CallOptions).BatchGetUserLinks)], opts...)
 	var resp *adminpb.BatchGetUserLinksResponse
@@ -1748,6 +1756,7 @@
 
 func (c *analyticsAdminGRPCClient) ListUserLinks(ctx context.Context, req *adminpb.ListUserLinksRequest, opts ...gax.CallOption) *UserLinkIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListUserLinks[0:len((*c.CallOptions).ListUserLinks):len((*c.CallOptions).ListUserLinks)], opts...)
 	it := &UserLinkIterator{}
@@ -1792,6 +1801,7 @@
 
 func (c *analyticsAdminGRPCClient) AuditUserLinks(ctx context.Context, req *adminpb.AuditUserLinksRequest, opts ...gax.CallOption) *AuditUserLinkIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AuditUserLinks[0:len((*c.CallOptions).AuditUserLinks):len((*c.CallOptions).AuditUserLinks)], opts...)
 	it := &AuditUserLinkIterator{}
@@ -1841,6 +1851,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateUserLink[0:len((*c.CallOptions).CreateUserLink):len((*c.CallOptions).CreateUserLink)], opts...)
 	var resp *adminpb.UserLink
@@ -1862,6 +1873,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCreateUserLinks[0:len((*c.CallOptions).BatchCreateUserLinks):len((*c.CallOptions).BatchCreateUserLinks)], opts...)
 	var resp *adminpb.BatchCreateUserLinksResponse
@@ -1883,6 +1895,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "user_link.name", url.QueryEscape(req.GetUserLink().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateUserLink[0:len((*c.CallOptions).UpdateUserLink):len((*c.CallOptions).UpdateUserLink)], opts...)
 	var resp *adminpb.UserLink
@@ -1904,6 +1917,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchUpdateUserLinks[0:len((*c.CallOptions).BatchUpdateUserLinks):len((*c.CallOptions).BatchUpdateUserLinks)], opts...)
 	var resp *adminpb.BatchUpdateUserLinksResponse
@@ -1925,6 +1939,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteUserLink[0:len((*c.CallOptions).DeleteUserLink):len((*c.CallOptions).DeleteUserLink)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1942,6 +1957,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchDeleteUserLinks[0:len((*c.CallOptions).BatchDeleteUserLinks):len((*c.CallOptions).BatchDeleteUserLinks)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1959,6 +1975,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetWebDataStream[0:len((*c.CallOptions).GetWebDataStream):len((*c.CallOptions).GetWebDataStream)], opts...)
 	var resp *adminpb.WebDataStream
@@ -1980,6 +1997,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteWebDataStream[0:len((*c.CallOptions).DeleteWebDataStream):len((*c.CallOptions).DeleteWebDataStream)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1997,6 +2015,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "web_data_stream.name", url.QueryEscape(req.GetWebDataStream().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateWebDataStream[0:len((*c.CallOptions).UpdateWebDataStream):len((*c.CallOptions).UpdateWebDataStream)], opts...)
 	var resp *adminpb.WebDataStream
@@ -2018,6 +2037,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateWebDataStream[0:len((*c.CallOptions).CreateWebDataStream):len((*c.CallOptions).CreateWebDataStream)], opts...)
 	var resp *adminpb.WebDataStream
@@ -2034,6 +2054,7 @@
 
 func (c *analyticsAdminGRPCClient) ListWebDataStreams(ctx context.Context, req *adminpb.ListWebDataStreamsRequest, opts ...gax.CallOption) *WebDataStreamIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListWebDataStreams[0:len((*c.CallOptions).ListWebDataStreams):len((*c.CallOptions).ListWebDataStreams)], opts...)
 	it := &WebDataStreamIterator{}
@@ -2083,6 +2104,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIosAppDataStream[0:len((*c.CallOptions).GetIosAppDataStream):len((*c.CallOptions).GetIosAppDataStream)], opts...)
 	var resp *adminpb.IosAppDataStream
@@ -2104,6 +2126,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteIosAppDataStream[0:len((*c.CallOptions).DeleteIosAppDataStream):len((*c.CallOptions).DeleteIosAppDataStream)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -2121,6 +2144,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "ios_app_data_stream.name", url.QueryEscape(req.GetIosAppDataStream().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateIosAppDataStream[0:len((*c.CallOptions).UpdateIosAppDataStream):len((*c.CallOptions).UpdateIosAppDataStream)], opts...)
 	var resp *adminpb.IosAppDataStream
@@ -2137,6 +2161,7 @@
 
 func (c *analyticsAdminGRPCClient) ListIosAppDataStreams(ctx context.Context, req *adminpb.ListIosAppDataStreamsRequest, opts ...gax.CallOption) *IosAppDataStreamIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListIosAppDataStreams[0:len((*c.CallOptions).ListIosAppDataStreams):len((*c.CallOptions).ListIosAppDataStreams)], opts...)
 	it := &IosAppDataStreamIterator{}
@@ -2186,6 +2211,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAndroidAppDataStream[0:len((*c.CallOptions).GetAndroidAppDataStream):len((*c.CallOptions).GetAndroidAppDataStream)], opts...)
 	var resp *adminpb.AndroidAppDataStream
@@ -2207,6 +2233,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAndroidAppDataStream[0:len((*c.CallOptions).DeleteAndroidAppDataStream):len((*c.CallOptions).DeleteAndroidAppDataStream)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -2224,6 +2251,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "android_app_data_stream.name", url.QueryEscape(req.GetAndroidAppDataStream().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAndroidAppDataStream[0:len((*c.CallOptions).UpdateAndroidAppDataStream):len((*c.CallOptions).UpdateAndroidAppDataStream)], opts...)
 	var resp *adminpb.AndroidAppDataStream
@@ -2240,6 +2268,7 @@
 
 func (c *analyticsAdminGRPCClient) ListAndroidAppDataStreams(ctx context.Context, req *adminpb.ListAndroidAppDataStreamsRequest, opts ...gax.CallOption) *AndroidAppDataStreamIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAndroidAppDataStreams[0:len((*c.CallOptions).ListAndroidAppDataStreams):len((*c.CallOptions).ListAndroidAppDataStreams)], opts...)
 	it := &AndroidAppDataStreamIterator{}
@@ -2289,6 +2318,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateFirebaseLink[0:len((*c.CallOptions).CreateFirebaseLink):len((*c.CallOptions).CreateFirebaseLink)], opts...)
 	var resp *adminpb.FirebaseLink
@@ -2310,6 +2340,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteFirebaseLink[0:len((*c.CallOptions).DeleteFirebaseLink):len((*c.CallOptions).DeleteFirebaseLink)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -2322,6 +2353,7 @@
 
 func (c *analyticsAdminGRPCClient) ListFirebaseLinks(ctx context.Context, req *adminpb.ListFirebaseLinksRequest, opts ...gax.CallOption) *FirebaseLinkIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFirebaseLinks[0:len((*c.CallOptions).ListFirebaseLinks):len((*c.CallOptions).ListFirebaseLinks)], opts...)
 	it := &FirebaseLinkIterator{}
@@ -2371,6 +2403,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGlobalSiteTag[0:len((*c.CallOptions).GetGlobalSiteTag):len((*c.CallOptions).GetGlobalSiteTag)], opts...)
 	var resp *adminpb.GlobalSiteTag
@@ -2392,6 +2425,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGoogleAdsLink[0:len((*c.CallOptions).CreateGoogleAdsLink):len((*c.CallOptions).CreateGoogleAdsLink)], opts...)
 	var resp *adminpb.GoogleAdsLink
@@ -2413,6 +2447,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "google_ads_link.name", url.QueryEscape(req.GetGoogleAdsLink().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGoogleAdsLink[0:len((*c.CallOptions).UpdateGoogleAdsLink):len((*c.CallOptions).UpdateGoogleAdsLink)], opts...)
 	var resp *adminpb.GoogleAdsLink
@@ -2434,6 +2469,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGoogleAdsLink[0:len((*c.CallOptions).DeleteGoogleAdsLink):len((*c.CallOptions).DeleteGoogleAdsLink)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -2446,6 +2482,7 @@
 
 func (c *analyticsAdminGRPCClient) ListGoogleAdsLinks(ctx context.Context, req *adminpb.ListGoogleAdsLinksRequest, opts ...gax.CallOption) *GoogleAdsLinkIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGoogleAdsLinks[0:len((*c.CallOptions).ListGoogleAdsLinks):len((*c.CallOptions).ListGoogleAdsLinks)], opts...)
 	it := &GoogleAdsLinkIterator{}
@@ -2495,6 +2532,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDataSharingSettings[0:len((*c.CallOptions).GetDataSharingSettings):len((*c.CallOptions).GetDataSharingSettings)], opts...)
 	var resp *adminpb.DataSharingSettings
@@ -2516,6 +2554,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMeasurementProtocolSecret[0:len((*c.CallOptions).GetMeasurementProtocolSecret):len((*c.CallOptions).GetMeasurementProtocolSecret)], opts...)
 	var resp *adminpb.MeasurementProtocolSecret
@@ -2532,6 +2571,7 @@
 
 func (c *analyticsAdminGRPCClient) ListMeasurementProtocolSecrets(ctx context.Context, req *adminpb.ListMeasurementProtocolSecretsRequest, opts ...gax.CallOption) *MeasurementProtocolSecretIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMeasurementProtocolSecrets[0:len((*c.CallOptions).ListMeasurementProtocolSecrets):len((*c.CallOptions).ListMeasurementProtocolSecrets)], opts...)
 	it := &MeasurementProtocolSecretIterator{}
@@ -2581,6 +2621,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMeasurementProtocolSecret[0:len((*c.CallOptions).CreateMeasurementProtocolSecret):len((*c.CallOptions).CreateMeasurementProtocolSecret)], opts...)
 	var resp *adminpb.MeasurementProtocolSecret
@@ -2602,6 +2643,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteMeasurementProtocolSecret[0:len((*c.CallOptions).DeleteMeasurementProtocolSecret):len((*c.CallOptions).DeleteMeasurementProtocolSecret)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -2619,6 +2661,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "measurement_protocol_secret.name", url.QueryEscape(req.GetMeasurementProtocolSecret().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateMeasurementProtocolSecret[0:len((*c.CallOptions).UpdateMeasurementProtocolSecret):len((*c.CallOptions).UpdateMeasurementProtocolSecret)], opts...)
 	var resp *adminpb.MeasurementProtocolSecret
@@ -2640,6 +2683,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "property", url.QueryEscape(req.GetProperty())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AcknowledgeUserDataCollection[0:len((*c.CallOptions).AcknowledgeUserDataCollection):len((*c.CallOptions).AcknowledgeUserDataCollection)], opts...)
 	var resp *adminpb.AcknowledgeUserDataCollectionResponse
@@ -2656,6 +2700,7 @@
 
 func (c *analyticsAdminGRPCClient) SearchChangeHistoryEvents(ctx context.Context, req *adminpb.SearchChangeHistoryEventsRequest, opts ...gax.CallOption) *ChangeHistoryEventIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "account", url.QueryEscape(req.GetAccount())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchChangeHistoryEvents[0:len((*c.CallOptions).SearchChangeHistoryEvents):len((*c.CallOptions).SearchChangeHistoryEvents)], opts...)
 	it := &ChangeHistoryEventIterator{}
@@ -2705,6 +2750,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGoogleSignalsSettings[0:len((*c.CallOptions).GetGoogleSignalsSettings):len((*c.CallOptions).GetGoogleSignalsSettings)], opts...)
 	var resp *adminpb.GoogleSignalsSettings
@@ -2726,6 +2772,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "google_signals_settings.name", url.QueryEscape(req.GetGoogleSignalsSettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGoogleSignalsSettings[0:len((*c.CallOptions).UpdateGoogleSignalsSettings):len((*c.CallOptions).UpdateGoogleSignalsSettings)], opts...)
 	var resp *adminpb.GoogleSignalsSettings
@@ -2747,6 +2794,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateConversionEvent[0:len((*c.CallOptions).CreateConversionEvent):len((*c.CallOptions).CreateConversionEvent)], opts...)
 	var resp *adminpb.ConversionEvent
@@ -2768,6 +2816,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetConversionEvent[0:len((*c.CallOptions).GetConversionEvent):len((*c.CallOptions).GetConversionEvent)], opts...)
 	var resp *adminpb.ConversionEvent
@@ -2789,6 +2838,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteConversionEvent[0:len((*c.CallOptions).DeleteConversionEvent):len((*c.CallOptions).DeleteConversionEvent)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -2801,6 +2851,7 @@
 
 func (c *analyticsAdminGRPCClient) ListConversionEvents(ctx context.Context, req *adminpb.ListConversionEventsRequest, opts ...gax.CallOption) *ConversionEventIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListConversionEvents[0:len((*c.CallOptions).ListConversionEvents):len((*c.CallOptions).ListConversionEvents)], opts...)
 	it := &ConversionEventIterator{}
@@ -2850,6 +2901,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDisplayVideo360AdvertiserLink[0:len((*c.CallOptions).GetDisplayVideo360AdvertiserLink):len((*c.CallOptions).GetDisplayVideo360AdvertiserLink)], opts...)
 	var resp *adminpb.DisplayVideo360AdvertiserLink
@@ -2866,6 +2918,7 @@
 
 func (c *analyticsAdminGRPCClient) ListDisplayVideo360AdvertiserLinks(ctx context.Context, req *adminpb.ListDisplayVideo360AdvertiserLinksRequest, opts ...gax.CallOption) *DisplayVideo360AdvertiserLinkIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDisplayVideo360AdvertiserLinks[0:len((*c.CallOptions).ListDisplayVideo360AdvertiserLinks):len((*c.CallOptions).ListDisplayVideo360AdvertiserLinks)], opts...)
 	it := &DisplayVideo360AdvertiserLinkIterator{}
@@ -2915,6 +2968,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDisplayVideo360AdvertiserLink[0:len((*c.CallOptions).CreateDisplayVideo360AdvertiserLink):len((*c.CallOptions).CreateDisplayVideo360AdvertiserLink)], opts...)
 	var resp *adminpb.DisplayVideo360AdvertiserLink
@@ -2936,6 +2990,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDisplayVideo360AdvertiserLink[0:len((*c.CallOptions).DeleteDisplayVideo360AdvertiserLink):len((*c.CallOptions).DeleteDisplayVideo360AdvertiserLink)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -2953,6 +3008,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "display_video_360_advertiser_link.name", url.QueryEscape(req.GetDisplayVideo_360AdvertiserLink().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDisplayVideo360AdvertiserLink[0:len((*c.CallOptions).UpdateDisplayVideo360AdvertiserLink):len((*c.CallOptions).UpdateDisplayVideo360AdvertiserLink)], opts...)
 	var resp *adminpb.DisplayVideo360AdvertiserLink
@@ -2974,6 +3030,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDisplayVideo360AdvertiserLinkProposal[0:len((*c.CallOptions).GetDisplayVideo360AdvertiserLinkProposal):len((*c.CallOptions).GetDisplayVideo360AdvertiserLinkProposal)], opts...)
 	var resp *adminpb.DisplayVideo360AdvertiserLinkProposal
@@ -2990,6 +3047,7 @@
 
 func (c *analyticsAdminGRPCClient) ListDisplayVideo360AdvertiserLinkProposals(ctx context.Context, req *adminpb.ListDisplayVideo360AdvertiserLinkProposalsRequest, opts ...gax.CallOption) *DisplayVideo360AdvertiserLinkProposalIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDisplayVideo360AdvertiserLinkProposals[0:len((*c.CallOptions).ListDisplayVideo360AdvertiserLinkProposals):len((*c.CallOptions).ListDisplayVideo360AdvertiserLinkProposals)], opts...)
 	it := &DisplayVideo360AdvertiserLinkProposalIterator{}
@@ -3039,6 +3097,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDisplayVideo360AdvertiserLinkProposal[0:len((*c.CallOptions).CreateDisplayVideo360AdvertiserLinkProposal):len((*c.CallOptions).CreateDisplayVideo360AdvertiserLinkProposal)], opts...)
 	var resp *adminpb.DisplayVideo360AdvertiserLinkProposal
@@ -3060,6 +3119,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDisplayVideo360AdvertiserLinkProposal[0:len((*c.CallOptions).DeleteDisplayVideo360AdvertiserLinkProposal):len((*c.CallOptions).DeleteDisplayVideo360AdvertiserLinkProposal)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -3077,6 +3137,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ApproveDisplayVideo360AdvertiserLinkProposal[0:len((*c.CallOptions).ApproveDisplayVideo360AdvertiserLinkProposal):len((*c.CallOptions).ApproveDisplayVideo360AdvertiserLinkProposal)], opts...)
 	var resp *adminpb.ApproveDisplayVideo360AdvertiserLinkProposalResponse
@@ -3098,6 +3159,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelDisplayVideo360AdvertiserLinkProposal[0:len((*c.CallOptions).CancelDisplayVideo360AdvertiserLinkProposal):len((*c.CallOptions).CancelDisplayVideo360AdvertiserLinkProposal)], opts...)
 	var resp *adminpb.DisplayVideo360AdvertiserLinkProposal
@@ -3119,6 +3181,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCustomDimension[0:len((*c.CallOptions).CreateCustomDimension):len((*c.CallOptions).CreateCustomDimension)], opts...)
 	var resp *adminpb.CustomDimension
@@ -3140,6 +3203,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "custom_dimension.name", url.QueryEscape(req.GetCustomDimension().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCustomDimension[0:len((*c.CallOptions).UpdateCustomDimension):len((*c.CallOptions).UpdateCustomDimension)], opts...)
 	var resp *adminpb.CustomDimension
@@ -3156,6 +3220,7 @@
 
 func (c *analyticsAdminGRPCClient) ListCustomDimensions(ctx context.Context, req *adminpb.ListCustomDimensionsRequest, opts ...gax.CallOption) *CustomDimensionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCustomDimensions[0:len((*c.CallOptions).ListCustomDimensions):len((*c.CallOptions).ListCustomDimensions)], opts...)
 	it := &CustomDimensionIterator{}
@@ -3205,6 +3270,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ArchiveCustomDimension[0:len((*c.CallOptions).ArchiveCustomDimension):len((*c.CallOptions).ArchiveCustomDimension)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -3222,6 +3288,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCustomDimension[0:len((*c.CallOptions).GetCustomDimension):len((*c.CallOptions).GetCustomDimension)], opts...)
 	var resp *adminpb.CustomDimension
@@ -3243,6 +3310,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCustomMetric[0:len((*c.CallOptions).CreateCustomMetric):len((*c.CallOptions).CreateCustomMetric)], opts...)
 	var resp *adminpb.CustomMetric
@@ -3264,6 +3332,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "custom_metric.name", url.QueryEscape(req.GetCustomMetric().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCustomMetric[0:len((*c.CallOptions).UpdateCustomMetric):len((*c.CallOptions).UpdateCustomMetric)], opts...)
 	var resp *adminpb.CustomMetric
@@ -3280,6 +3349,7 @@
 
 func (c *analyticsAdminGRPCClient) ListCustomMetrics(ctx context.Context, req *adminpb.ListCustomMetricsRequest, opts ...gax.CallOption) *CustomMetricIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCustomMetrics[0:len((*c.CallOptions).ListCustomMetrics):len((*c.CallOptions).ListCustomMetrics)], opts...)
 	it := &CustomMetricIterator{}
@@ -3329,6 +3399,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ArchiveCustomMetric[0:len((*c.CallOptions).ArchiveCustomMetric):len((*c.CallOptions).ArchiveCustomMetric)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -3346,6 +3417,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCustomMetric[0:len((*c.CallOptions).GetCustomMetric):len((*c.CallOptions).GetCustomMetric)], opts...)
 	var resp *adminpb.CustomMetric
@@ -3367,6 +3439,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDataRetentionSettings[0:len((*c.CallOptions).GetDataRetentionSettings):len((*c.CallOptions).GetDataRetentionSettings)], opts...)
 	var resp *adminpb.DataRetentionSettings
@@ -3388,6 +3461,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "data_retention_settings.name", url.QueryEscape(req.GetDataRetentionSettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDataRetentionSettings[0:len((*c.CallOptions).UpdateDataRetentionSettings):len((*c.CallOptions).UpdateDataRetentionSettings)], opts...)
 	var resp *adminpb.DataRetentionSettings
@@ -3409,6 +3483,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDataStream[0:len((*c.CallOptions).CreateDataStream):len((*c.CallOptions).CreateDataStream)], opts...)
 	var resp *adminpb.DataStream
@@ -3430,6 +3505,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDataStream[0:len((*c.CallOptions).DeleteDataStream):len((*c.CallOptions).DeleteDataStream)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -3447,6 +3523,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "data_stream.name", url.QueryEscape(req.GetDataStream().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDataStream[0:len((*c.CallOptions).UpdateDataStream):len((*c.CallOptions).UpdateDataStream)], opts...)
 	var resp *adminpb.DataStream
@@ -3463,6 +3540,7 @@
 
 func (c *analyticsAdminGRPCClient) ListDataStreams(ctx context.Context, req *adminpb.ListDataStreamsRequest, opts ...gax.CallOption) *DataStreamIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDataStreams[0:len((*c.CallOptions).ListDataStreams):len((*c.CallOptions).ListDataStreams)], opts...)
 	it := &DataStreamIterator{}
@@ -3512,6 +3590,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDataStream[0:len((*c.CallOptions).GetDataStream):len((*c.CallOptions).GetDataStream)], opts...)
 	var resp *adminpb.DataStream
diff --git a/analytics/admin/apiv1alpha/doc.go b/analytics/admin/apiv1alpha/doc.go
index 21ed32e..0c55177 100644
--- a/analytics/admin/apiv1alpha/doc.go
+++ b/analytics/admin/apiv1alpha/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/analytics/admin/apiv1alpha/version.go b/analytics/admin/apiv1alpha/version.go
new file mode 100644
index 0000000..c0adefa
--- /dev/null
+++ b/analytics/admin/apiv1alpha/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package admin
+
+import "cloud.google.com/go/analytics/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/apigateway/apiv1/api_gateway_client.go b/apigateway/apiv1/api_gateway_client.go
index 26b6e0d..4ea3219 100644
--- a/apigateway/apiv1/api_gateway_client.go
+++ b/apigateway/apiv1/api_gateway_client.go
@@ -475,7 +475,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -487,6 +487,7 @@
 
 func (c *gRPCClient) ListGateways(ctx context.Context, req *apigatewaypb.ListGatewaysRequest, opts ...gax.CallOption) *GatewayIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGateways[0:len((*c.CallOptions).ListGateways):len((*c.CallOptions).ListGateways)], opts...)
 	it := &GatewayIterator{}
@@ -531,6 +532,7 @@
 
 func (c *gRPCClient) GetGateway(ctx context.Context, req *apigatewaypb.GetGatewayRequest, opts ...gax.CallOption) (*apigatewaypb.Gateway, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGateway[0:len((*c.CallOptions).GetGateway):len((*c.CallOptions).GetGateway)], opts...)
 	var resp *apigatewaypb.Gateway
@@ -552,6 +554,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGateway[0:len((*c.CallOptions).CreateGateway):len((*c.CallOptions).CreateGateway)], opts...)
 	var resp *longrunningpb.Operation
@@ -575,6 +578,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "gateway.name", url.QueryEscape(req.GetGateway().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGateway[0:len((*c.CallOptions).UpdateGateway):len((*c.CallOptions).UpdateGateway)], opts...)
 	var resp *longrunningpb.Operation
@@ -598,6 +602,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGateway[0:len((*c.CallOptions).DeleteGateway):len((*c.CallOptions).DeleteGateway)], opts...)
 	var resp *longrunningpb.Operation
@@ -616,6 +621,7 @@
 
 func (c *gRPCClient) ListApis(ctx context.Context, req *apigatewaypb.ListApisRequest, opts ...gax.CallOption) *ApiIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListApis[0:len((*c.CallOptions).ListApis):len((*c.CallOptions).ListApis)], opts...)
 	it := &ApiIterator{}
@@ -660,6 +666,7 @@
 
 func (c *gRPCClient) GetApi(ctx context.Context, req *apigatewaypb.GetApiRequest, opts ...gax.CallOption) (*apigatewaypb.Api, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetApi[0:len((*c.CallOptions).GetApi):len((*c.CallOptions).GetApi)], opts...)
 	var resp *apigatewaypb.Api
@@ -681,6 +688,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateApi[0:len((*c.CallOptions).CreateApi):len((*c.CallOptions).CreateApi)], opts...)
 	var resp *longrunningpb.Operation
@@ -704,6 +712,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "api.name", url.QueryEscape(req.GetApi().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateApi[0:len((*c.CallOptions).UpdateApi):len((*c.CallOptions).UpdateApi)], opts...)
 	var resp *longrunningpb.Operation
@@ -727,6 +736,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteApi[0:len((*c.CallOptions).DeleteApi):len((*c.CallOptions).DeleteApi)], opts...)
 	var resp *longrunningpb.Operation
@@ -745,6 +755,7 @@
 
 func (c *gRPCClient) ListApiConfigs(ctx context.Context, req *apigatewaypb.ListApiConfigsRequest, opts ...gax.CallOption) *ApiConfigIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListApiConfigs[0:len((*c.CallOptions).ListApiConfigs):len((*c.CallOptions).ListApiConfigs)], opts...)
 	it := &ApiConfigIterator{}
@@ -789,6 +800,7 @@
 
 func (c *gRPCClient) GetApiConfig(ctx context.Context, req *apigatewaypb.GetApiConfigRequest, opts ...gax.CallOption) (*apigatewaypb.ApiConfig, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetApiConfig[0:len((*c.CallOptions).GetApiConfig):len((*c.CallOptions).GetApiConfig)], opts...)
 	var resp *apigatewaypb.ApiConfig
@@ -810,6 +822,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateApiConfig[0:len((*c.CallOptions).CreateApiConfig):len((*c.CallOptions).CreateApiConfig)], opts...)
 	var resp *longrunningpb.Operation
@@ -833,6 +846,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "api_config.name", url.QueryEscape(req.GetApiConfig().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateApiConfig[0:len((*c.CallOptions).UpdateApiConfig):len((*c.CallOptions).UpdateApiConfig)], opts...)
 	var resp *longrunningpb.Operation
@@ -856,6 +870,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteApiConfig[0:len((*c.CallOptions).DeleteApiConfig):len((*c.CallOptions).DeleteApiConfig)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/apigateway/apiv1/doc.go b/apigateway/apiv1/doc.go
index 6c69b13..8c071ea 100644
--- a/apigateway/apiv1/doc.go
+++ b/apigateway/apiv1/doc.go
@@ -88,7 +88,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/apigateway/apiv1/version.go b/apigateway/apiv1/version.go
new file mode 100644
index 0000000..797b3bb
--- /dev/null
+++ b/apigateway/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package apigateway
+
+import "cloud.google.com/go/apigateway/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/apigeeconnect/apiv1/connection_client.go b/apigeeconnect/apiv1/connection_client.go
index 6c1953a..c0d5c59 100644
--- a/apigeeconnect/apiv1/connection_client.go
+++ b/apigeeconnect/apiv1/connection_client.go
@@ -189,7 +189,7 @@
 // use by Google-written clients.
 func (c *connectionGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -201,6 +201,7 @@
 
 func (c *connectionGRPCClient) ListConnections(ctx context.Context, req *apigeeconnectpb.ListConnectionsRequest, opts ...gax.CallOption) *ConnectionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListConnections[0:len((*c.CallOptions).ListConnections):len((*c.CallOptions).ListConnections)], opts...)
 	it := &ConnectionIterator{}
diff --git a/apigeeconnect/apiv1/doc.go b/apigeeconnect/apiv1/doc.go
index 3ac3ca2..496baad 100644
--- a/apigeeconnect/apiv1/doc.go
+++ b/apigeeconnect/apiv1/doc.go
@@ -88,7 +88,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/apigeeconnect/apiv1/tether_client.go b/apigeeconnect/apiv1/tether_client.go
index 4988ff9..8e14926 100644
--- a/apigeeconnect/apiv1/tether_client.go
+++ b/apigeeconnect/apiv1/tether_client.go
@@ -181,7 +181,7 @@
 // use by Google-written clients.
 func (c *tetherGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/apigeeconnect/apiv1/version.go b/apigeeconnect/apiv1/version.go
new file mode 100644
index 0000000..47b86d1
--- /dev/null
+++ b/apigeeconnect/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package apigeeconnect
+
+import "cloud.google.com/go/apigeeconnect/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/appengine/apiv1/applications_client.go b/appengine/apiv1/applications_client.go
index 8dde1c3..22e6eaf 100644
--- a/appengine/apiv1/applications_client.go
+++ b/appengine/apiv1/applications_client.go
@@ -264,7 +264,7 @@
 // use by Google-written clients.
 func (c *applicationsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -276,6 +276,7 @@
 
 func (c *applicationsGRPCClient) GetApplication(ctx context.Context, req *appenginepb.GetApplicationRequest, opts ...gax.CallOption) (*appenginepb.Application, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetApplication[0:len((*c.CallOptions).GetApplication):len((*c.CallOptions).GetApplication)], opts...)
 	var resp *appenginepb.Application
@@ -309,6 +310,7 @@
 
 func (c *applicationsGRPCClient) UpdateApplication(ctx context.Context, req *appenginepb.UpdateApplicationRequest, opts ...gax.CallOption) (*UpdateApplicationOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateApplication[0:len((*c.CallOptions).UpdateApplication):len((*c.CallOptions).UpdateApplication)], opts...)
 	var resp *longrunningpb.Operation
@@ -327,6 +329,7 @@
 
 func (c *applicationsGRPCClient) RepairApplication(ctx context.Context, req *appenginepb.RepairApplicationRequest, opts ...gax.CallOption) (*RepairApplicationOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RepairApplication[0:len((*c.CallOptions).RepairApplication):len((*c.CallOptions).RepairApplication)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/appengine/apiv1/authorized_certificates_client.go b/appengine/apiv1/authorized_certificates_client.go
index 79ffff0..7625a1e 100644
--- a/appengine/apiv1/authorized_certificates_client.go
+++ b/appengine/apiv1/authorized_certificates_client.go
@@ -213,7 +213,7 @@
 // use by Google-written clients.
 func (c *authorizedCertificatesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -225,6 +225,7 @@
 
 func (c *authorizedCertificatesGRPCClient) ListAuthorizedCertificates(ctx context.Context, req *appenginepb.ListAuthorizedCertificatesRequest, opts ...gax.CallOption) *AuthorizedCertificateIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAuthorizedCertificates[0:len((*c.CallOptions).ListAuthorizedCertificates):len((*c.CallOptions).ListAuthorizedCertificates)], opts...)
 	it := &AuthorizedCertificateIterator{}
@@ -269,6 +270,7 @@
 
 func (c *authorizedCertificatesGRPCClient) GetAuthorizedCertificate(ctx context.Context, req *appenginepb.GetAuthorizedCertificateRequest, opts ...gax.CallOption) (*appenginepb.AuthorizedCertificate, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAuthorizedCertificate[0:len((*c.CallOptions).GetAuthorizedCertificate):len((*c.CallOptions).GetAuthorizedCertificate)], opts...)
 	var resp *appenginepb.AuthorizedCertificate
@@ -285,6 +287,7 @@
 
 func (c *authorizedCertificatesGRPCClient) CreateAuthorizedCertificate(ctx context.Context, req *appenginepb.CreateAuthorizedCertificateRequest, opts ...gax.CallOption) (*appenginepb.AuthorizedCertificate, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAuthorizedCertificate[0:len((*c.CallOptions).CreateAuthorizedCertificate):len((*c.CallOptions).CreateAuthorizedCertificate)], opts...)
 	var resp *appenginepb.AuthorizedCertificate
@@ -301,6 +304,7 @@
 
 func (c *authorizedCertificatesGRPCClient) UpdateAuthorizedCertificate(ctx context.Context, req *appenginepb.UpdateAuthorizedCertificateRequest, opts ...gax.CallOption) (*appenginepb.AuthorizedCertificate, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAuthorizedCertificate[0:len((*c.CallOptions).UpdateAuthorizedCertificate):len((*c.CallOptions).UpdateAuthorizedCertificate)], opts...)
 	var resp *appenginepb.AuthorizedCertificate
@@ -317,6 +321,7 @@
 
 func (c *authorizedCertificatesGRPCClient) DeleteAuthorizedCertificate(ctx context.Context, req *appenginepb.DeleteAuthorizedCertificateRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAuthorizedCertificate[0:len((*c.CallOptions).DeleteAuthorizedCertificate):len((*c.CallOptions).DeleteAuthorizedCertificate)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/appengine/apiv1/authorized_domains_client.go b/appengine/apiv1/authorized_domains_client.go
index 6eb0805..6aea8b0 100644
--- a/appengine/apiv1/authorized_domains_client.go
+++ b/appengine/apiv1/authorized_domains_client.go
@@ -179,7 +179,7 @@
 // use by Google-written clients.
 func (c *authorizedDomainsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -191,6 +191,7 @@
 
 func (c *authorizedDomainsGRPCClient) ListAuthorizedDomains(ctx context.Context, req *appenginepb.ListAuthorizedDomainsRequest, opts ...gax.CallOption) *AuthorizedDomainIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAuthorizedDomains[0:len((*c.CallOptions).ListAuthorizedDomains):len((*c.CallOptions).ListAuthorizedDomains)], opts...)
 	it := &AuthorizedDomainIterator{}
diff --git a/appengine/apiv1/doc.go b/appengine/apiv1/doc.go
index 2d0d295..d85f7e8 100644
--- a/appengine/apiv1/doc.go
+++ b/appengine/apiv1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/appengine/apiv1/domain_mappings_client.go b/appengine/apiv1/domain_mappings_client.go
index aa169bb..fb99887 100644
--- a/appengine/apiv1/domain_mappings_client.go
+++ b/appengine/apiv1/domain_mappings_client.go
@@ -260,7 +260,7 @@
 // use by Google-written clients.
 func (c *domainMappingsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -272,6 +272,7 @@
 
 func (c *domainMappingsGRPCClient) ListDomainMappings(ctx context.Context, req *appenginepb.ListDomainMappingsRequest, opts ...gax.CallOption) *DomainMappingIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDomainMappings[0:len((*c.CallOptions).ListDomainMappings):len((*c.CallOptions).ListDomainMappings)], opts...)
 	it := &DomainMappingIterator{}
@@ -316,6 +317,7 @@
 
 func (c *domainMappingsGRPCClient) GetDomainMapping(ctx context.Context, req *appenginepb.GetDomainMappingRequest, opts ...gax.CallOption) (*appenginepb.DomainMapping, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDomainMapping[0:len((*c.CallOptions).GetDomainMapping):len((*c.CallOptions).GetDomainMapping)], opts...)
 	var resp *appenginepb.DomainMapping
@@ -332,6 +334,7 @@
 
 func (c *domainMappingsGRPCClient) CreateDomainMapping(ctx context.Context, req *appenginepb.CreateDomainMappingRequest, opts ...gax.CallOption) (*CreateDomainMappingOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDomainMapping[0:len((*c.CallOptions).CreateDomainMapping):len((*c.CallOptions).CreateDomainMapping)], opts...)
 	var resp *longrunningpb.Operation
@@ -350,6 +353,7 @@
 
 func (c *domainMappingsGRPCClient) UpdateDomainMapping(ctx context.Context, req *appenginepb.UpdateDomainMappingRequest, opts ...gax.CallOption) (*UpdateDomainMappingOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDomainMapping[0:len((*c.CallOptions).UpdateDomainMapping):len((*c.CallOptions).UpdateDomainMapping)], opts...)
 	var resp *longrunningpb.Operation
@@ -368,6 +372,7 @@
 
 func (c *domainMappingsGRPCClient) DeleteDomainMapping(ctx context.Context, req *appenginepb.DeleteDomainMappingRequest, opts ...gax.CallOption) (*DeleteDomainMappingOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDomainMapping[0:len((*c.CallOptions).DeleteDomainMapping):len((*c.CallOptions).DeleteDomainMapping)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/appengine/apiv1/firewall_client.go b/appengine/apiv1/firewall_client.go
index e29d350..0da87b9 100644
--- a/appengine/apiv1/firewall_client.go
+++ b/appengine/apiv1/firewall_client.go
@@ -237,7 +237,7 @@
 // use by Google-written clients.
 func (c *firewallGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -249,6 +249,7 @@
 
 func (c *firewallGRPCClient) ListIngressRules(ctx context.Context, req *appenginepb.ListIngressRulesRequest, opts ...gax.CallOption) *FirewallRuleIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListIngressRules[0:len((*c.CallOptions).ListIngressRules):len((*c.CallOptions).ListIngressRules)], opts...)
 	it := &FirewallRuleIterator{}
@@ -293,6 +294,7 @@
 
 func (c *firewallGRPCClient) BatchUpdateIngressRules(ctx context.Context, req *appenginepb.BatchUpdateIngressRulesRequest, opts ...gax.CallOption) (*appenginepb.BatchUpdateIngressRulesResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchUpdateIngressRules[0:len((*c.CallOptions).BatchUpdateIngressRules):len((*c.CallOptions).BatchUpdateIngressRules)], opts...)
 	var resp *appenginepb.BatchUpdateIngressRulesResponse
@@ -309,6 +311,7 @@
 
 func (c *firewallGRPCClient) CreateIngressRule(ctx context.Context, req *appenginepb.CreateIngressRuleRequest, opts ...gax.CallOption) (*appenginepb.FirewallRule, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateIngressRule[0:len((*c.CallOptions).CreateIngressRule):len((*c.CallOptions).CreateIngressRule)], opts...)
 	var resp *appenginepb.FirewallRule
@@ -325,6 +328,7 @@
 
 func (c *firewallGRPCClient) GetIngressRule(ctx context.Context, req *appenginepb.GetIngressRuleRequest, opts ...gax.CallOption) (*appenginepb.FirewallRule, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIngressRule[0:len((*c.CallOptions).GetIngressRule):len((*c.CallOptions).GetIngressRule)], opts...)
 	var resp *appenginepb.FirewallRule
@@ -341,6 +345,7 @@
 
 func (c *firewallGRPCClient) UpdateIngressRule(ctx context.Context, req *appenginepb.UpdateIngressRuleRequest, opts ...gax.CallOption) (*appenginepb.FirewallRule, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateIngressRule[0:len((*c.CallOptions).UpdateIngressRule):len((*c.CallOptions).UpdateIngressRule)], opts...)
 	var resp *appenginepb.FirewallRule
@@ -357,6 +362,7 @@
 
 func (c *firewallGRPCClient) DeleteIngressRule(ctx context.Context, req *appenginepb.DeleteIngressRuleRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteIngressRule[0:len((*c.CallOptions).DeleteIngressRule):len((*c.CallOptions).DeleteIngressRule)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/appengine/apiv1/instances_client.go b/appengine/apiv1/instances_client.go
index 3347140..be8d2b9 100644
--- a/appengine/apiv1/instances_client.go
+++ b/appengine/apiv1/instances_client.go
@@ -259,7 +259,7 @@
 // use by Google-written clients.
 func (c *instancesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -271,6 +271,7 @@
 
 func (c *instancesGRPCClient) ListInstances(ctx context.Context, req *appenginepb.ListInstancesRequest, opts ...gax.CallOption) *InstanceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInstances[0:len((*c.CallOptions).ListInstances):len((*c.CallOptions).ListInstances)], opts...)
 	it := &InstanceIterator{}
@@ -315,6 +316,7 @@
 
 func (c *instancesGRPCClient) GetInstance(ctx context.Context, req *appenginepb.GetInstanceRequest, opts ...gax.CallOption) (*appenginepb.Instance, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstance[0:len((*c.CallOptions).GetInstance):len((*c.CallOptions).GetInstance)], opts...)
 	var resp *appenginepb.Instance
@@ -331,6 +333,7 @@
 
 func (c *instancesGRPCClient) DeleteInstance(ctx context.Context, req *appenginepb.DeleteInstanceRequest, opts ...gax.CallOption) (*DeleteInstanceOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteInstance[0:len((*c.CallOptions).DeleteInstance):len((*c.CallOptions).DeleteInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -349,6 +352,7 @@
 
 func (c *instancesGRPCClient) DebugInstance(ctx context.Context, req *appenginepb.DebugInstanceRequest, opts ...gax.CallOption) (*DebugInstanceOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DebugInstance[0:len((*c.CallOptions).DebugInstance):len((*c.CallOptions).DebugInstance)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/appengine/apiv1/services_client.go b/appengine/apiv1/services_client.go
index c500867..7d819e0 100644
--- a/appengine/apiv1/services_client.go
+++ b/appengine/apiv1/services_client.go
@@ -238,7 +238,7 @@
 // use by Google-written clients.
 func (c *servicesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -250,6 +250,7 @@
 
 func (c *servicesGRPCClient) ListServices(ctx context.Context, req *appenginepb.ListServicesRequest, opts ...gax.CallOption) *ServiceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServices[0:len((*c.CallOptions).ListServices):len((*c.CallOptions).ListServices)], opts...)
 	it := &ServiceIterator{}
@@ -294,6 +295,7 @@
 
 func (c *servicesGRPCClient) GetService(ctx context.Context, req *appenginepb.GetServiceRequest, opts ...gax.CallOption) (*appenginepb.Service, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetService[0:len((*c.CallOptions).GetService):len((*c.CallOptions).GetService)], opts...)
 	var resp *appenginepb.Service
@@ -310,6 +312,7 @@
 
 func (c *servicesGRPCClient) UpdateService(ctx context.Context, req *appenginepb.UpdateServiceRequest, opts ...gax.CallOption) (*UpdateServiceOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateService[0:len((*c.CallOptions).UpdateService):len((*c.CallOptions).UpdateService)], opts...)
 	var resp *longrunningpb.Operation
@@ -328,6 +331,7 @@
 
 func (c *servicesGRPCClient) DeleteService(ctx context.Context, req *appenginepb.DeleteServiceRequest, opts ...gax.CallOption) (*DeleteServiceOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteService[0:len((*c.CallOptions).DeleteService):len((*c.CallOptions).DeleteService)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/appengine/apiv1/version.go b/appengine/apiv1/version.go
new file mode 100644
index 0000000..cb743c0
--- /dev/null
+++ b/appengine/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package appengine
+
+import "cloud.google.com/go/appengine/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/appengine/apiv1/versions_client.go b/appengine/apiv1/versions_client.go
index f111fe7..34fc203 100644
--- a/appengine/apiv1/versions_client.go
+++ b/appengine/apiv1/versions_client.go
@@ -299,7 +299,7 @@
 // use by Google-written clients.
 func (c *versionsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -311,6 +311,7 @@
 
 func (c *versionsGRPCClient) ListVersions(ctx context.Context, req *appenginepb.ListVersionsRequest, opts ...gax.CallOption) *VersionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListVersions[0:len((*c.CallOptions).ListVersions):len((*c.CallOptions).ListVersions)], opts...)
 	it := &VersionIterator{}
@@ -355,6 +356,7 @@
 
 func (c *versionsGRPCClient) GetVersion(ctx context.Context, req *appenginepb.GetVersionRequest, opts ...gax.CallOption) (*appenginepb.Version, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetVersion[0:len((*c.CallOptions).GetVersion):len((*c.CallOptions).GetVersion)], opts...)
 	var resp *appenginepb.Version
@@ -371,6 +373,7 @@
 
 func (c *versionsGRPCClient) CreateVersion(ctx context.Context, req *appenginepb.CreateVersionRequest, opts ...gax.CallOption) (*CreateVersionOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateVersion[0:len((*c.CallOptions).CreateVersion):len((*c.CallOptions).CreateVersion)], opts...)
 	var resp *longrunningpb.Operation
@@ -389,6 +392,7 @@
 
 func (c *versionsGRPCClient) UpdateVersion(ctx context.Context, req *appenginepb.UpdateVersionRequest, opts ...gax.CallOption) (*UpdateVersionOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateVersion[0:len((*c.CallOptions).UpdateVersion):len((*c.CallOptions).UpdateVersion)], opts...)
 	var resp *longrunningpb.Operation
@@ -407,6 +411,7 @@
 
 func (c *versionsGRPCClient) DeleteVersion(ctx context.Context, req *appenginepb.DeleteVersionRequest, opts ...gax.CallOption) (*DeleteVersionOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteVersion[0:len((*c.CallOptions).DeleteVersion):len((*c.CallOptions).DeleteVersion)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/area120/tables/apiv1alpha1/doc.go b/area120/tables/apiv1alpha1/doc.go
index bbe470e..757571b 100644
--- a/area120/tables/apiv1alpha1/doc.go
+++ b/area120/tables/apiv1alpha1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/area120/tables/apiv1alpha1/tables_client.go b/area120/tables/apiv1alpha1/tables_client.go
index c7202e4..caed75c 100644
--- a/area120/tables/apiv1alpha1/tables_client.go
+++ b/area120/tables/apiv1alpha1/tables_client.go
@@ -286,7 +286,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -303,6 +303,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTable[0:len((*c.CallOptions).GetTable):len((*c.CallOptions).GetTable)], opts...)
 	var resp *tablespb.Table
@@ -367,6 +368,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetWorkspace[0:len((*c.CallOptions).GetWorkspace):len((*c.CallOptions).GetWorkspace)], opts...)
 	var resp *tablespb.Workspace
@@ -431,6 +433,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetRow[0:len((*c.CallOptions).GetRow):len((*c.CallOptions).GetRow)], opts...)
 	var resp *tablespb.Row
@@ -447,6 +450,7 @@
 
 func (c *gRPCClient) ListRows(ctx context.Context, req *tablespb.ListRowsRequest, opts ...gax.CallOption) *RowIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListRows[0:len((*c.CallOptions).ListRows):len((*c.CallOptions).ListRows)], opts...)
 	it := &RowIterator{}
@@ -496,6 +500,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateRow[0:len((*c.CallOptions).CreateRow):len((*c.CallOptions).CreateRow)], opts...)
 	var resp *tablespb.Row
@@ -517,6 +522,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCreateRows[0:len((*c.CallOptions).BatchCreateRows):len((*c.CallOptions).BatchCreateRows)], opts...)
 	var resp *tablespb.BatchCreateRowsResponse
@@ -538,6 +544,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "row.name", url.QueryEscape(req.GetRow().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateRow[0:len((*c.CallOptions).UpdateRow):len((*c.CallOptions).UpdateRow)], opts...)
 	var resp *tablespb.Row
@@ -559,6 +566,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchUpdateRows[0:len((*c.CallOptions).BatchUpdateRows):len((*c.CallOptions).BatchUpdateRows)], opts...)
 	var resp *tablespb.BatchUpdateRowsResponse
@@ -580,6 +588,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteRow[0:len((*c.CallOptions).DeleteRow):len((*c.CallOptions).DeleteRow)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -597,6 +606,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchDeleteRows[0:len((*c.CallOptions).BatchDeleteRows):len((*c.CallOptions).BatchDeleteRows)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/area120/tables/apiv1alpha1/version.go b/area120/tables/apiv1alpha1/version.go
new file mode 100644
index 0000000..d90a88d
--- /dev/null
+++ b/area120/tables/apiv1alpha1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package tables
+
+import "cloud.google.com/go/area120/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/artifactregistry/apiv1beta2/artifact_registry_client.go b/artifactregistry/apiv1beta2/artifact_registry_client.go
index eaa1cb6..6ba4adf 100644
--- a/artifactregistry/apiv1beta2/artifact_registry_client.go
+++ b/artifactregistry/apiv1beta2/artifact_registry_client.go
@@ -629,7 +629,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -641,6 +641,7 @@
 
 func (c *gRPCClient) ImportAptArtifacts(ctx context.Context, req *artifactregistrypb.ImportAptArtifactsRequest, opts ...gax.CallOption) (*ImportAptArtifactsOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportAptArtifacts[0:len((*c.CallOptions).ImportAptArtifacts):len((*c.CallOptions).ImportAptArtifacts)], opts...)
 	var resp *longrunningpb.Operation
@@ -659,6 +660,7 @@
 
 func (c *gRPCClient) ImportYumArtifacts(ctx context.Context, req *artifactregistrypb.ImportYumArtifactsRequest, opts ...gax.CallOption) (*ImportYumArtifactsOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportYumArtifacts[0:len((*c.CallOptions).ImportYumArtifacts):len((*c.CallOptions).ImportYumArtifacts)], opts...)
 	var resp *longrunningpb.Operation
@@ -677,6 +679,7 @@
 
 func (c *gRPCClient) ListRepositories(ctx context.Context, req *artifactregistrypb.ListRepositoriesRequest, opts ...gax.CallOption) *RepositoryIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListRepositories[0:len((*c.CallOptions).ListRepositories):len((*c.CallOptions).ListRepositories)], opts...)
 	it := &RepositoryIterator{}
@@ -726,6 +729,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetRepository[0:len((*c.CallOptions).GetRepository):len((*c.CallOptions).GetRepository)], opts...)
 	var resp *artifactregistrypb.Repository
@@ -747,6 +751,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateRepository[0:len((*c.CallOptions).CreateRepository):len((*c.CallOptions).CreateRepository)], opts...)
 	var resp *longrunningpb.Operation
@@ -770,6 +775,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "repository.name", url.QueryEscape(req.GetRepository().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateRepository[0:len((*c.CallOptions).UpdateRepository):len((*c.CallOptions).UpdateRepository)], opts...)
 	var resp *artifactregistrypb.Repository
@@ -791,6 +797,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteRepository[0:len((*c.CallOptions).DeleteRepository):len((*c.CallOptions).DeleteRepository)], opts...)
 	var resp *longrunningpb.Operation
@@ -809,6 +816,7 @@
 
 func (c *gRPCClient) ListPackages(ctx context.Context, req *artifactregistrypb.ListPackagesRequest, opts ...gax.CallOption) *PackageIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPackages[0:len((*c.CallOptions).ListPackages):len((*c.CallOptions).ListPackages)], opts...)
 	it := &PackageIterator{}
@@ -858,6 +866,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPackage[0:len((*c.CallOptions).GetPackage):len((*c.CallOptions).GetPackage)], opts...)
 	var resp *artifactregistrypb.Package
@@ -879,6 +888,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePackage[0:len((*c.CallOptions).DeletePackage):len((*c.CallOptions).DeletePackage)], opts...)
 	var resp *longrunningpb.Operation
@@ -897,6 +907,7 @@
 
 func (c *gRPCClient) ListVersions(ctx context.Context, req *artifactregistrypb.ListVersionsRequest, opts ...gax.CallOption) *VersionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListVersions[0:len((*c.CallOptions).ListVersions):len((*c.CallOptions).ListVersions)], opts...)
 	it := &VersionIterator{}
@@ -946,6 +957,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetVersion[0:len((*c.CallOptions).GetVersion):len((*c.CallOptions).GetVersion)], opts...)
 	var resp *artifactregistrypb.Version
@@ -967,6 +979,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteVersion[0:len((*c.CallOptions).DeleteVersion):len((*c.CallOptions).DeleteVersion)], opts...)
 	var resp *longrunningpb.Operation
@@ -985,6 +998,7 @@
 
 func (c *gRPCClient) ListFiles(ctx context.Context, req *artifactregistrypb.ListFilesRequest, opts ...gax.CallOption) *FileIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFiles[0:len((*c.CallOptions).ListFiles):len((*c.CallOptions).ListFiles)], opts...)
 	it := &FileIterator{}
@@ -1034,6 +1048,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFile[0:len((*c.CallOptions).GetFile):len((*c.CallOptions).GetFile)], opts...)
 	var resp *artifactregistrypb.File
@@ -1050,6 +1065,7 @@
 
 func (c *gRPCClient) ListTags(ctx context.Context, req *artifactregistrypb.ListTagsRequest, opts ...gax.CallOption) *TagIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTags[0:len((*c.CallOptions).ListTags):len((*c.CallOptions).ListTags)], opts...)
 	it := &TagIterator{}
@@ -1099,6 +1115,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTag[0:len((*c.CallOptions).GetTag):len((*c.CallOptions).GetTag)], opts...)
 	var resp *artifactregistrypb.Tag
@@ -1120,6 +1137,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTag[0:len((*c.CallOptions).CreateTag):len((*c.CallOptions).CreateTag)], opts...)
 	var resp *artifactregistrypb.Tag
@@ -1141,6 +1159,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tag.name", url.QueryEscape(req.GetTag().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTag[0:len((*c.CallOptions).UpdateTag):len((*c.CallOptions).UpdateTag)], opts...)
 	var resp *artifactregistrypb.Tag
@@ -1162,6 +1181,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTag[0:len((*c.CallOptions).DeleteTag):len((*c.CallOptions).DeleteTag)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1174,6 +1194,7 @@
 
 func (c *gRPCClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -1195,6 +1216,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -1216,6 +1238,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
@@ -1232,6 +1255,7 @@
 
 func (c *gRPCClient) GetProjectSettings(ctx context.Context, req *artifactregistrypb.GetProjectSettingsRequest, opts ...gax.CallOption) (*artifactregistrypb.ProjectSettings, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetProjectSettings[0:len((*c.CallOptions).GetProjectSettings):len((*c.CallOptions).GetProjectSettings)], opts...)
 	var resp *artifactregistrypb.ProjectSettings
@@ -1248,6 +1272,7 @@
 
 func (c *gRPCClient) UpdateProjectSettings(ctx context.Context, req *artifactregistrypb.UpdateProjectSettingsRequest, opts ...gax.CallOption) (*artifactregistrypb.ProjectSettings, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_settings.name", url.QueryEscape(req.GetProjectSettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateProjectSettings[0:len((*c.CallOptions).UpdateProjectSettings):len((*c.CallOptions).UpdateProjectSettings)], opts...)
 	var resp *artifactregistrypb.ProjectSettings
diff --git a/artifactregistry/apiv1beta2/doc.go b/artifactregistry/apiv1beta2/doc.go
index 5c8d2cb..eb679ef 100644
--- a/artifactregistry/apiv1beta2/doc.go
+++ b/artifactregistry/apiv1beta2/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/artifactregistry/apiv1beta2/version.go b/artifactregistry/apiv1beta2/version.go
new file mode 100644
index 0000000..baeed36
--- /dev/null
+++ b/artifactregistry/apiv1beta2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package artifactregistry
+
+import "cloud.google.com/go/artifactregistry/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/asset/apiv1/asset_client.go b/asset/apiv1/asset_client.go
index 76a15bf..c924cb2 100644
--- a/asset/apiv1/asset_client.go
+++ b/asset/apiv1/asset_client.go
@@ -432,7 +432,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -449,6 +449,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportAssets[0:len((*c.CallOptions).ExportAssets):len((*c.CallOptions).ExportAssets)], opts...)
 	var resp *longrunningpb.Operation
@@ -467,6 +468,7 @@
 
 func (c *gRPCClient) ListAssets(ctx context.Context, req *assetpb.ListAssetsRequest, opts ...gax.CallOption) *AssetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAssets[0:len((*c.CallOptions).ListAssets):len((*c.CallOptions).ListAssets)], opts...)
 	it := &AssetIterator{}
@@ -516,6 +518,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchGetAssetsHistory[0:len((*c.CallOptions).BatchGetAssetsHistory):len((*c.CallOptions).BatchGetAssetsHistory)], opts...)
 	var resp *assetpb.BatchGetAssetsHistoryResponse
@@ -537,6 +540,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateFeed[0:len((*c.CallOptions).CreateFeed):len((*c.CallOptions).CreateFeed)], opts...)
 	var resp *assetpb.Feed
@@ -558,6 +562,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFeed[0:len((*c.CallOptions).GetFeed):len((*c.CallOptions).GetFeed)], opts...)
 	var resp *assetpb.Feed
@@ -579,6 +584,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFeeds[0:len((*c.CallOptions).ListFeeds):len((*c.CallOptions).ListFeeds)], opts...)
 	var resp *assetpb.ListFeedsResponse
@@ -600,6 +606,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "feed.name", url.QueryEscape(req.GetFeed().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFeed[0:len((*c.CallOptions).UpdateFeed):len((*c.CallOptions).UpdateFeed)], opts...)
 	var resp *assetpb.Feed
@@ -621,6 +628,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteFeed[0:len((*c.CallOptions).DeleteFeed):len((*c.CallOptions).DeleteFeed)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -633,6 +641,7 @@
 
 func (c *gRPCClient) SearchAllResources(ctx context.Context, req *assetpb.SearchAllResourcesRequest, opts ...gax.CallOption) *ResourceSearchResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "scope", url.QueryEscape(req.GetScope())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchAllResources[0:len((*c.CallOptions).SearchAllResources):len((*c.CallOptions).SearchAllResources)], opts...)
 	it := &ResourceSearchResultIterator{}
@@ -677,6 +686,7 @@
 
 func (c *gRPCClient) SearchAllIamPolicies(ctx context.Context, req *assetpb.SearchAllIamPoliciesRequest, opts ...gax.CallOption) *IamPolicySearchResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "scope", url.QueryEscape(req.GetScope())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchAllIamPolicies[0:len((*c.CallOptions).SearchAllIamPolicies):len((*c.CallOptions).SearchAllIamPolicies)], opts...)
 	it := &IamPolicySearchResultIterator{}
@@ -726,6 +736,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "analysis_query.scope", url.QueryEscape(req.GetAnalysisQuery().GetScope())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AnalyzeIamPolicy[0:len((*c.CallOptions).AnalyzeIamPolicy):len((*c.CallOptions).AnalyzeIamPolicy)], opts...)
 	var resp *assetpb.AnalyzeIamPolicyResponse
@@ -747,6 +758,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "analysis_query.scope", url.QueryEscape(req.GetAnalysisQuery().GetScope())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AnalyzeIamPolicyLongrunning[0:len((*c.CallOptions).AnalyzeIamPolicyLongrunning):len((*c.CallOptions).AnalyzeIamPolicyLongrunning)], opts...)
 	var resp *longrunningpb.Operation
@@ -765,6 +777,7 @@
 
 func (c *gRPCClient) AnalyzeMove(ctx context.Context, req *assetpb.AnalyzeMoveRequest, opts ...gax.CallOption) (*assetpb.AnalyzeMoveResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AnalyzeMove[0:len((*c.CallOptions).AnalyzeMove):len((*c.CallOptions).AnalyzeMove)], opts...)
 	var resp *assetpb.AnalyzeMoveResponse
diff --git a/asset/apiv1/doc.go b/asset/apiv1/doc.go
index b913ee8..1323d80 100644
--- a/asset/apiv1/doc.go
+++ b/asset/apiv1/doc.go
@@ -89,7 +89,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/asset/apiv1/version.go b/asset/apiv1/version.go
new file mode 100644
index 0000000..bc82d61
--- /dev/null
+++ b/asset/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package asset
+
+import "cloud.google.com/go/asset/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/asset/apiv1p2beta1/asset_client.go b/asset/apiv1p2beta1/asset_client.go
index 149b190..be8a92c 100644
--- a/asset/apiv1p2beta1/asset_client.go
+++ b/asset/apiv1p2beta1/asset_client.go
@@ -241,7 +241,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -258,6 +258,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateFeed[0:len((*c.CallOptions).CreateFeed):len((*c.CallOptions).CreateFeed)], opts...)
 	var resp *assetpb.Feed
@@ -279,6 +280,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFeed[0:len((*c.CallOptions).GetFeed):len((*c.CallOptions).GetFeed)], opts...)
 	var resp *assetpb.Feed
@@ -300,6 +302,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFeeds[0:len((*c.CallOptions).ListFeeds):len((*c.CallOptions).ListFeeds)], opts...)
 	var resp *assetpb.ListFeedsResponse
@@ -321,6 +324,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "feed.name", url.QueryEscape(req.GetFeed().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFeed[0:len((*c.CallOptions).UpdateFeed):len((*c.CallOptions).UpdateFeed)], opts...)
 	var resp *assetpb.Feed
@@ -342,6 +346,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteFeed[0:len((*c.CallOptions).DeleteFeed):len((*c.CallOptions).DeleteFeed)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/asset/apiv1p2beta1/doc.go b/asset/apiv1p2beta1/doc.go
index 88ad8d1..4fcce49 100644
--- a/asset/apiv1p2beta1/doc.go
+++ b/asset/apiv1p2beta1/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/asset/apiv1p2beta1/version.go b/asset/apiv1p2beta1/version.go
new file mode 100644
index 0000000..bc82d61
--- /dev/null
+++ b/asset/apiv1p2beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package asset
+
+import "cloud.google.com/go/asset/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/asset/apiv1p5beta1/asset_client.go b/asset/apiv1p5beta1/asset_client.go
index f5e68f5..7c6de7a 100644
--- a/asset/apiv1p5beta1/asset_client.go
+++ b/asset/apiv1p5beta1/asset_client.go
@@ -189,7 +189,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -201,6 +201,7 @@
 
 func (c *gRPCClient) ListAssets(ctx context.Context, req *assetpb.ListAssetsRequest, opts ...gax.CallOption) *AssetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAssets[0:len((*c.CallOptions).ListAssets):len((*c.CallOptions).ListAssets)], opts...)
 	it := &AssetIterator{}
diff --git a/asset/apiv1p5beta1/doc.go b/asset/apiv1p5beta1/doc.go
index 06b8d47..ce19884 100644
--- a/asset/apiv1p5beta1/doc.go
+++ b/asset/apiv1p5beta1/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/asset/apiv1p5beta1/version.go b/asset/apiv1p5beta1/version.go
new file mode 100644
index 0000000..bc82d61
--- /dev/null
+++ b/asset/apiv1p5beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package asset
+
+import "cloud.google.com/go/asset/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/assuredworkloads/apiv1beta1/assured_workloads_client.go b/assuredworkloads/apiv1beta1/assured_workloads_client.go
index 8e0a789..71b96f7 100644
--- a/assuredworkloads/apiv1beta1/assured_workloads_client.go
+++ b/assuredworkloads/apiv1beta1/assured_workloads_client.go
@@ -275,7 +275,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -292,6 +292,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateWorkload[0:len((*c.CallOptions).CreateWorkload):len((*c.CallOptions).CreateWorkload)], opts...)
 	var resp *longrunningpb.Operation
@@ -315,6 +316,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "workload.name", url.QueryEscape(req.GetWorkload().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateWorkload[0:len((*c.CallOptions).UpdateWorkload):len((*c.CallOptions).UpdateWorkload)], opts...)
 	var resp *assuredworkloadspb.Workload
@@ -336,6 +338,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteWorkload[0:len((*c.CallOptions).DeleteWorkload):len((*c.CallOptions).DeleteWorkload)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -353,6 +356,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetWorkload[0:len((*c.CallOptions).GetWorkload):len((*c.CallOptions).GetWorkload)], opts...)
 	var resp *assuredworkloadspb.Workload
@@ -369,6 +373,7 @@
 
 func (c *gRPCClient) ListWorkloads(ctx context.Context, req *assuredworkloadspb.ListWorkloadsRequest, opts ...gax.CallOption) *WorkloadIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListWorkloads[0:len((*c.CallOptions).ListWorkloads):len((*c.CallOptions).ListWorkloads)], opts...)
 	it := &WorkloadIterator{}
diff --git a/assuredworkloads/apiv1beta1/doc.go b/assuredworkloads/apiv1beta1/doc.go
index 668d7bc..b7a4d35 100644
--- a/assuredworkloads/apiv1beta1/doc.go
+++ b/assuredworkloads/apiv1beta1/doc.go
@@ -89,7 +89,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/assuredworkloads/apiv1beta1/version.go b/assuredworkloads/apiv1beta1/version.go
new file mode 100644
index 0000000..70a3cdd
--- /dev/null
+++ b/assuredworkloads/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package assuredworkloads
+
+import "cloud.google.com/go/assuredworkloads/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/automl/apiv1/auto_ml_client.go b/automl/apiv1/auto_ml_client.go
index 351f3bb..448695f 100644
--- a/automl/apiv1/auto_ml_client.go
+++ b/automl/apiv1/auto_ml_client.go
@@ -570,7 +570,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -587,6 +587,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDataset[0:len((*c.CallOptions).CreateDataset):len((*c.CallOptions).CreateDataset)], opts...)
 	var resp *longrunningpb.Operation
@@ -610,6 +611,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDataset[0:len((*c.CallOptions).GetDataset):len((*c.CallOptions).GetDataset)], opts...)
 	var resp *automlpb.Dataset
@@ -626,6 +628,7 @@
 
 func (c *gRPCClient) ListDatasets(ctx context.Context, req *automlpb.ListDatasetsRequest, opts ...gax.CallOption) *DatasetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDatasets[0:len((*c.CallOptions).ListDatasets):len((*c.CallOptions).ListDatasets)], opts...)
 	it := &DatasetIterator{}
@@ -675,6 +678,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "dataset.name", url.QueryEscape(req.GetDataset().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDataset[0:len((*c.CallOptions).UpdateDataset):len((*c.CallOptions).UpdateDataset)], opts...)
 	var resp *automlpb.Dataset
@@ -696,6 +700,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDataset[0:len((*c.CallOptions).DeleteDataset):len((*c.CallOptions).DeleteDataset)], opts...)
 	var resp *longrunningpb.Operation
@@ -719,6 +724,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportData[0:len((*c.CallOptions).ImportData):len((*c.CallOptions).ImportData)], opts...)
 	var resp *longrunningpb.Operation
@@ -742,6 +748,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportData[0:len((*c.CallOptions).ExportData):len((*c.CallOptions).ExportData)], opts...)
 	var resp *longrunningpb.Operation
@@ -765,6 +772,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAnnotationSpec[0:len((*c.CallOptions).GetAnnotationSpec):len((*c.CallOptions).GetAnnotationSpec)], opts...)
 	var resp *automlpb.AnnotationSpec
@@ -786,6 +794,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateModel[0:len((*c.CallOptions).CreateModel):len((*c.CallOptions).CreateModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -809,6 +818,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetModel[0:len((*c.CallOptions).GetModel):len((*c.CallOptions).GetModel)], opts...)
 	var resp *automlpb.Model
@@ -825,6 +835,7 @@
 
 func (c *gRPCClient) ListModels(ctx context.Context, req *automlpb.ListModelsRequest, opts ...gax.CallOption) *ModelIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListModels[0:len((*c.CallOptions).ListModels):len((*c.CallOptions).ListModels)], opts...)
 	it := &ModelIterator{}
@@ -874,6 +885,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteModel[0:len((*c.CallOptions).DeleteModel):len((*c.CallOptions).DeleteModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -897,6 +909,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "model.name", url.QueryEscape(req.GetModel().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateModel[0:len((*c.CallOptions).UpdateModel):len((*c.CallOptions).UpdateModel)], opts...)
 	var resp *automlpb.Model
@@ -918,6 +931,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeployModel[0:len((*c.CallOptions).DeployModel):len((*c.CallOptions).DeployModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -941,6 +955,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UndeployModel[0:len((*c.CallOptions).UndeployModel):len((*c.CallOptions).UndeployModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -964,6 +979,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportModel[0:len((*c.CallOptions).ExportModel):len((*c.CallOptions).ExportModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -987,6 +1003,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetModelEvaluation[0:len((*c.CallOptions).GetModelEvaluation):len((*c.CallOptions).GetModelEvaluation)], opts...)
 	var resp *automlpb.ModelEvaluation
@@ -1003,6 +1020,7 @@
 
 func (c *gRPCClient) ListModelEvaluations(ctx context.Context, req *automlpb.ListModelEvaluationsRequest, opts ...gax.CallOption) *ModelEvaluationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListModelEvaluations[0:len((*c.CallOptions).ListModelEvaluations):len((*c.CallOptions).ListModelEvaluations)], opts...)
 	it := &ModelEvaluationIterator{}
diff --git a/automl/apiv1/doc.go b/automl/apiv1/doc.go
index aaf1c63..23f5f97 100644
--- a/automl/apiv1/doc.go
+++ b/automl/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/automl/apiv1/prediction_client.go b/automl/apiv1/prediction_client.go
index e83aa0f..234f2cb 100644
--- a/automl/apiv1/prediction_client.go
+++ b/automl/apiv1/prediction_client.go
@@ -274,7 +274,7 @@
 // use by Google-written clients.
 func (c *predictionGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -291,6 +291,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Predict[0:len((*c.CallOptions).Predict):len((*c.CallOptions).Predict)], opts...)
 	var resp *automlpb.PredictResponse
@@ -312,6 +313,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchPredict[0:len((*c.CallOptions).BatchPredict):len((*c.CallOptions).BatchPredict)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/automl/apiv1/version.go b/automl/apiv1/version.go
new file mode 100644
index 0000000..21a85ff
--- /dev/null
+++ b/automl/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package automl
+
+import "cloud.google.com/go/automl/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/automl/apiv1beta1/auto_ml_client.go b/automl/apiv1beta1/auto_ml_client.go
index dd45b95..ddbf6c8 100644
--- a/automl/apiv1beta1/auto_ml_client.go
+++ b/automl/apiv1beta1/auto_ml_client.go
@@ -666,7 +666,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -683,6 +683,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDataset[0:len((*c.CallOptions).CreateDataset):len((*c.CallOptions).CreateDataset)], opts...)
 	var resp *automlpb.Dataset
@@ -704,6 +705,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDataset[0:len((*c.CallOptions).GetDataset):len((*c.CallOptions).GetDataset)], opts...)
 	var resp *automlpb.Dataset
@@ -720,6 +722,7 @@
 
 func (c *gRPCClient) ListDatasets(ctx context.Context, req *automlpb.ListDatasetsRequest, opts ...gax.CallOption) *DatasetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDatasets[0:len((*c.CallOptions).ListDatasets):len((*c.CallOptions).ListDatasets)], opts...)
 	it := &DatasetIterator{}
@@ -769,6 +772,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "dataset.name", url.QueryEscape(req.GetDataset().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDataset[0:len((*c.CallOptions).UpdateDataset):len((*c.CallOptions).UpdateDataset)], opts...)
 	var resp *automlpb.Dataset
@@ -790,6 +794,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDataset[0:len((*c.CallOptions).DeleteDataset):len((*c.CallOptions).DeleteDataset)], opts...)
 	var resp *longrunningpb.Operation
@@ -813,6 +818,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportData[0:len((*c.CallOptions).ImportData):len((*c.CallOptions).ImportData)], opts...)
 	var resp *longrunningpb.Operation
@@ -836,6 +842,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportData[0:len((*c.CallOptions).ExportData):len((*c.CallOptions).ExportData)], opts...)
 	var resp *longrunningpb.Operation
@@ -859,6 +866,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAnnotationSpec[0:len((*c.CallOptions).GetAnnotationSpec):len((*c.CallOptions).GetAnnotationSpec)], opts...)
 	var resp *automlpb.AnnotationSpec
@@ -880,6 +888,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTableSpec[0:len((*c.CallOptions).GetTableSpec):len((*c.CallOptions).GetTableSpec)], opts...)
 	var resp *automlpb.TableSpec
@@ -896,6 +905,7 @@
 
 func (c *gRPCClient) ListTableSpecs(ctx context.Context, req *automlpb.ListTableSpecsRequest, opts ...gax.CallOption) *TableSpecIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTableSpecs[0:len((*c.CallOptions).ListTableSpecs):len((*c.CallOptions).ListTableSpecs)], opts...)
 	it := &TableSpecIterator{}
@@ -945,6 +955,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "table_spec.name", url.QueryEscape(req.GetTableSpec().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTableSpec[0:len((*c.CallOptions).UpdateTableSpec):len((*c.CallOptions).UpdateTableSpec)], opts...)
 	var resp *automlpb.TableSpec
@@ -966,6 +977,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetColumnSpec[0:len((*c.CallOptions).GetColumnSpec):len((*c.CallOptions).GetColumnSpec)], opts...)
 	var resp *automlpb.ColumnSpec
@@ -982,6 +994,7 @@
 
 func (c *gRPCClient) ListColumnSpecs(ctx context.Context, req *automlpb.ListColumnSpecsRequest, opts ...gax.CallOption) *ColumnSpecIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListColumnSpecs[0:len((*c.CallOptions).ListColumnSpecs):len((*c.CallOptions).ListColumnSpecs)], opts...)
 	it := &ColumnSpecIterator{}
@@ -1031,6 +1044,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "column_spec.name", url.QueryEscape(req.GetColumnSpec().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateColumnSpec[0:len((*c.CallOptions).UpdateColumnSpec):len((*c.CallOptions).UpdateColumnSpec)], opts...)
 	var resp *automlpb.ColumnSpec
@@ -1052,6 +1066,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateModel[0:len((*c.CallOptions).CreateModel):len((*c.CallOptions).CreateModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -1075,6 +1090,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetModel[0:len((*c.CallOptions).GetModel):len((*c.CallOptions).GetModel)], opts...)
 	var resp *automlpb.Model
@@ -1091,6 +1107,7 @@
 
 func (c *gRPCClient) ListModels(ctx context.Context, req *automlpb.ListModelsRequest, opts ...gax.CallOption) *ModelIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListModels[0:len((*c.CallOptions).ListModels):len((*c.CallOptions).ListModels)], opts...)
 	it := &ModelIterator{}
@@ -1140,6 +1157,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteModel[0:len((*c.CallOptions).DeleteModel):len((*c.CallOptions).DeleteModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -1163,6 +1181,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeployModel[0:len((*c.CallOptions).DeployModel):len((*c.CallOptions).DeployModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -1186,6 +1205,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UndeployModel[0:len((*c.CallOptions).UndeployModel):len((*c.CallOptions).UndeployModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -1209,6 +1229,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportModel[0:len((*c.CallOptions).ExportModel):len((*c.CallOptions).ExportModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -1232,6 +1253,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportEvaluatedExamples[0:len((*c.CallOptions).ExportEvaluatedExamples):len((*c.CallOptions).ExportEvaluatedExamples)], opts...)
 	var resp *longrunningpb.Operation
@@ -1255,6 +1277,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetModelEvaluation[0:len((*c.CallOptions).GetModelEvaluation):len((*c.CallOptions).GetModelEvaluation)], opts...)
 	var resp *automlpb.ModelEvaluation
@@ -1271,6 +1294,7 @@
 
 func (c *gRPCClient) ListModelEvaluations(ctx context.Context, req *automlpb.ListModelEvaluationsRequest, opts ...gax.CallOption) *ModelEvaluationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListModelEvaluations[0:len((*c.CallOptions).ListModelEvaluations):len((*c.CallOptions).ListModelEvaluations)], opts...)
 	it := &ModelEvaluationIterator{}
diff --git a/automl/apiv1beta1/doc.go b/automl/apiv1beta1/doc.go
index e950ac3..ea6259c 100644
--- a/automl/apiv1beta1/doc.go
+++ b/automl/apiv1beta1/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/automl/apiv1beta1/prediction_client.go b/automl/apiv1beta1/prediction_client.go
index d3a4522..27950ea 100644
--- a/automl/apiv1beta1/prediction_client.go
+++ b/automl/apiv1beta1/prediction_client.go
@@ -260,7 +260,7 @@
 // use by Google-written clients.
 func (c *predictionGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -277,6 +277,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Predict[0:len((*c.CallOptions).Predict):len((*c.CallOptions).Predict)], opts...)
 	var resp *automlpb.PredictResponse
@@ -298,6 +299,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchPredict[0:len((*c.CallOptions).BatchPredict):len((*c.CallOptions).BatchPredict)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/automl/apiv1beta1/version.go b/automl/apiv1beta1/version.go
new file mode 100644
index 0000000..21a85ff
--- /dev/null
+++ b/automl/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package automl
+
+import "cloud.google.com/go/automl/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/bigquery/connection/apiv1/connection_client.go b/bigquery/connection/apiv1/connection_client.go
index bfaa791..d50dcbd 100644
--- a/bigquery/connection/apiv1/connection_client.go
+++ b/bigquery/connection/apiv1/connection_client.go
@@ -279,7 +279,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -296,6 +296,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateConnection[0:len((*c.CallOptions).CreateConnection):len((*c.CallOptions).CreateConnection)], opts...)
 	var resp *connectionpb.Connection
@@ -317,6 +318,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetConnection[0:len((*c.CallOptions).GetConnection):len((*c.CallOptions).GetConnection)], opts...)
 	var resp *connectionpb.Connection
@@ -333,6 +335,7 @@
 
 func (c *gRPCClient) ListConnections(ctx context.Context, req *connectionpb.ListConnectionsRequest, opts ...gax.CallOption) *ConnectionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListConnections[0:len((*c.CallOptions).ListConnections):len((*c.CallOptions).ListConnections)], opts...)
 	it := &ConnectionIterator{}
@@ -382,6 +385,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateConnection[0:len((*c.CallOptions).UpdateConnection):len((*c.CallOptions).UpdateConnection)], opts...)
 	var resp *connectionpb.Connection
@@ -403,6 +407,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteConnection[0:len((*c.CallOptions).DeleteConnection):len((*c.CallOptions).DeleteConnection)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -420,6 +425,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -441,6 +447,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -462,6 +469,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/bigquery/connection/apiv1/doc.go b/bigquery/connection/apiv1/doc.go
index 9034a35..4013bc7 100644
--- a/bigquery/connection/apiv1/doc.go
+++ b/bigquery/connection/apiv1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/connection/apiv1/version.go b/bigquery/connection/apiv1/version.go
new file mode 100644
index 0000000..fc482ae
--- /dev/null
+++ b/bigquery/connection/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package connection
+
+import "cloud.google.com/go/bigquery/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/bigquery/connection/apiv1beta1/connection_client.go b/bigquery/connection/apiv1beta1/connection_client.go
index cc5685c..c67af12 100644
--- a/bigquery/connection/apiv1beta1/connection_client.go
+++ b/bigquery/connection/apiv1beta1/connection_client.go
@@ -285,7 +285,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -302,6 +302,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateConnection[0:len((*c.CallOptions).CreateConnection):len((*c.CallOptions).CreateConnection)], opts...)
 	var resp *connectionpb.Connection
@@ -323,6 +324,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetConnection[0:len((*c.CallOptions).GetConnection):len((*c.CallOptions).GetConnection)], opts...)
 	var resp *connectionpb.Connection
@@ -344,6 +346,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListConnections[0:len((*c.CallOptions).ListConnections):len((*c.CallOptions).ListConnections)], opts...)
 	var resp *connectionpb.ListConnectionsResponse
@@ -365,6 +368,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateConnection[0:len((*c.CallOptions).UpdateConnection):len((*c.CallOptions).UpdateConnection)], opts...)
 	var resp *connectionpb.Connection
@@ -386,6 +390,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateConnectionCredential[0:len((*c.CallOptions).UpdateConnectionCredential):len((*c.CallOptions).UpdateConnectionCredential)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -403,6 +408,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteConnection[0:len((*c.CallOptions).DeleteConnection):len((*c.CallOptions).DeleteConnection)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -420,6 +426,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -441,6 +448,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -462,6 +470,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/bigquery/connection/apiv1beta1/doc.go b/bigquery/connection/apiv1beta1/doc.go
index 607486a..99e0bff 100644
--- a/bigquery/connection/apiv1beta1/doc.go
+++ b/bigquery/connection/apiv1beta1/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/connection/apiv1beta1/version.go b/bigquery/connection/apiv1beta1/version.go
new file mode 100644
index 0000000..fc482ae
--- /dev/null
+++ b/bigquery/connection/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package connection
+
+import "cloud.google.com/go/bigquery/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/bigquery/datatransfer/apiv1/data_transfer_client.go b/bigquery/datatransfer/apiv1/data_transfer_client.go
index 5057cb6..eb3c614 100644
--- a/bigquery/datatransfer/apiv1/data_transfer_client.go
+++ b/bigquery/datatransfer/apiv1/data_transfer_client.go
@@ -417,7 +417,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -434,6 +434,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDataSource[0:len((*c.CallOptions).GetDataSource):len((*c.CallOptions).GetDataSource)], opts...)
 	var resp *datatransferpb.DataSource
@@ -450,6 +451,7 @@
 
 func (c *gRPCClient) ListDataSources(ctx context.Context, req *datatransferpb.ListDataSourcesRequest, opts ...gax.CallOption) *DataSourceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDataSources[0:len((*c.CallOptions).ListDataSources):len((*c.CallOptions).ListDataSources)], opts...)
 	it := &DataSourceIterator{}
@@ -499,6 +501,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTransferConfig[0:len((*c.CallOptions).CreateTransferConfig):len((*c.CallOptions).CreateTransferConfig)], opts...)
 	var resp *datatransferpb.TransferConfig
@@ -520,6 +523,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "transfer_config.name", url.QueryEscape(req.GetTransferConfig().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTransferConfig[0:len((*c.CallOptions).UpdateTransferConfig):len((*c.CallOptions).UpdateTransferConfig)], opts...)
 	var resp *datatransferpb.TransferConfig
@@ -541,6 +545,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTransferConfig[0:len((*c.CallOptions).DeleteTransferConfig):len((*c.CallOptions).DeleteTransferConfig)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -558,6 +563,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTransferConfig[0:len((*c.CallOptions).GetTransferConfig):len((*c.CallOptions).GetTransferConfig)], opts...)
 	var resp *datatransferpb.TransferConfig
@@ -574,6 +580,7 @@
 
 func (c *gRPCClient) ListTransferConfigs(ctx context.Context, req *datatransferpb.ListTransferConfigsRequest, opts ...gax.CallOption) *TransferConfigIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTransferConfigs[0:len((*c.CallOptions).ListTransferConfigs):len((*c.CallOptions).ListTransferConfigs)], opts...)
 	it := &TransferConfigIterator{}
@@ -623,6 +630,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ScheduleTransferRuns[0:len((*c.CallOptions).ScheduleTransferRuns):len((*c.CallOptions).ScheduleTransferRuns)], opts...)
 	var resp *datatransferpb.ScheduleTransferRunsResponse
@@ -639,6 +647,7 @@
 
 func (c *gRPCClient) StartManualTransferRuns(ctx context.Context, req *datatransferpb.StartManualTransferRunsRequest, opts ...gax.CallOption) (*datatransferpb.StartManualTransferRunsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartManualTransferRuns[0:len((*c.CallOptions).StartManualTransferRuns):len((*c.CallOptions).StartManualTransferRuns)], opts...)
 	var resp *datatransferpb.StartManualTransferRunsResponse
@@ -660,6 +669,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTransferRun[0:len((*c.CallOptions).GetTransferRun):len((*c.CallOptions).GetTransferRun)], opts...)
 	var resp *datatransferpb.TransferRun
@@ -681,6 +691,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTransferRun[0:len((*c.CallOptions).DeleteTransferRun):len((*c.CallOptions).DeleteTransferRun)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -693,6 +704,7 @@
 
 func (c *gRPCClient) ListTransferRuns(ctx context.Context, req *datatransferpb.ListTransferRunsRequest, opts ...gax.CallOption) *TransferRunIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTransferRuns[0:len((*c.CallOptions).ListTransferRuns):len((*c.CallOptions).ListTransferRuns)], opts...)
 	it := &TransferRunIterator{}
@@ -737,6 +749,7 @@
 
 func (c *gRPCClient) ListTransferLogs(ctx context.Context, req *datatransferpb.ListTransferLogsRequest, opts ...gax.CallOption) *TransferMessageIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTransferLogs[0:len((*c.CallOptions).ListTransferLogs):len((*c.CallOptions).ListTransferLogs)], opts...)
 	it := &TransferMessageIterator{}
@@ -786,6 +799,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CheckValidCreds[0:len((*c.CallOptions).CheckValidCreds):len((*c.CallOptions).CheckValidCreds)], opts...)
 	var resp *datatransferpb.CheckValidCredsResponse
@@ -802,6 +816,7 @@
 
 func (c *gRPCClient) EnrollDataSources(ctx context.Context, req *datatransferpb.EnrollDataSourcesRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).EnrollDataSources[0:len((*c.CallOptions).EnrollDataSources):len((*c.CallOptions).EnrollDataSources)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/bigquery/datatransfer/apiv1/doc.go b/bigquery/datatransfer/apiv1/doc.go
index 423474a..56b259d 100644
--- a/bigquery/datatransfer/apiv1/doc.go
+++ b/bigquery/datatransfer/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/datatransfer/apiv1/version.go b/bigquery/datatransfer/apiv1/version.go
new file mode 100644
index 0000000..9af6ade
--- /dev/null
+++ b/bigquery/datatransfer/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package datatransfer
+
+import "cloud.google.com/go/bigquery/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/bigquery/migration/apiv2alpha/doc.go b/bigquery/migration/apiv2alpha/doc.go
index df31f30..4751349 100644
--- a/bigquery/migration/apiv2alpha/doc.go
+++ b/bigquery/migration/apiv2alpha/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/migration/apiv2alpha/migration_client.go b/bigquery/migration/apiv2alpha/migration_client.go
index 2042811..52fe504 100644
--- a/bigquery/migration/apiv2alpha/migration_client.go
+++ b/bigquery/migration/apiv2alpha/migration_client.go
@@ -278,7 +278,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -295,6 +295,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMigrationWorkflow[0:len((*c.CallOptions).CreateMigrationWorkflow):len((*c.CallOptions).CreateMigrationWorkflow)], opts...)
 	var resp *migrationpb.MigrationWorkflow
@@ -316,6 +317,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMigrationWorkflow[0:len((*c.CallOptions).GetMigrationWorkflow):len((*c.CallOptions).GetMigrationWorkflow)], opts...)
 	var resp *migrationpb.MigrationWorkflow
@@ -332,6 +334,7 @@
 
 func (c *gRPCClient) ListMigrationWorkflows(ctx context.Context, req *migrationpb.ListMigrationWorkflowsRequest, opts ...gax.CallOption) *MigrationWorkflowIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMigrationWorkflows[0:len((*c.CallOptions).ListMigrationWorkflows):len((*c.CallOptions).ListMigrationWorkflows)], opts...)
 	it := &MigrationWorkflowIterator{}
@@ -381,6 +384,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteMigrationWorkflow[0:len((*c.CallOptions).DeleteMigrationWorkflow):len((*c.CallOptions).DeleteMigrationWorkflow)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -398,6 +402,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartMigrationWorkflow[0:len((*c.CallOptions).StartMigrationWorkflow):len((*c.CallOptions).StartMigrationWorkflow)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -415,6 +420,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMigrationSubtask[0:len((*c.CallOptions).GetMigrationSubtask):len((*c.CallOptions).GetMigrationSubtask)], opts...)
 	var resp *migrationpb.MigrationSubtask
@@ -431,6 +437,7 @@
 
 func (c *gRPCClient) ListMigrationSubtasks(ctx context.Context, req *migrationpb.ListMigrationSubtasksRequest, opts ...gax.CallOption) *MigrationSubtaskIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMigrationSubtasks[0:len((*c.CallOptions).ListMigrationSubtasks):len((*c.CallOptions).ListMigrationSubtasks)], opts...)
 	it := &MigrationSubtaskIterator{}
diff --git a/bigquery/migration/apiv2alpha/sql_translation_client.go b/bigquery/migration/apiv2alpha/sql_translation_client.go
index 32f3068..32fed8a 100644
--- a/bigquery/migration/apiv2alpha/sql_translation_client.go
+++ b/bigquery/migration/apiv2alpha/sql_translation_client.go
@@ -173,7 +173,7 @@
 // use by Google-written clients.
 func (c *sqlTranslationGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -185,6 +185,7 @@
 
 func (c *sqlTranslationGRPCClient) TranslateQuery(ctx context.Context, req *migrationpb.TranslateQueryRequest, opts ...gax.CallOption) (*migrationpb.TranslateQueryResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TranslateQuery[0:len((*c.CallOptions).TranslateQuery):len((*c.CallOptions).TranslateQuery)], opts...)
 	var resp *migrationpb.TranslateQueryResponse
diff --git a/bigquery/migration/apiv2alpha/version.go b/bigquery/migration/apiv2alpha/version.go
new file mode 100644
index 0000000..0439868
--- /dev/null
+++ b/bigquery/migration/apiv2alpha/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package migration
+
+import "cloud.google.com/go/bigquery/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/bigquery/reservation/apiv1/doc.go b/bigquery/reservation/apiv1/doc.go
index 0a99597..b1bd0f8 100644
--- a/bigquery/reservation/apiv1/doc.go
+++ b/bigquery/reservation/apiv1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/reservation/apiv1/reservation_client.go b/bigquery/reservation/apiv1/reservation_client.go
index 6114285..8092af7 100644
--- a/bigquery/reservation/apiv1/reservation_client.go
+++ b/bigquery/reservation/apiv1/reservation_client.go
@@ -625,7 +625,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -642,6 +642,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateReservation[0:len((*c.CallOptions).CreateReservation):len((*c.CallOptions).CreateReservation)], opts...)
 	var resp *reservationpb.Reservation
@@ -658,6 +659,7 @@
 
 func (c *gRPCClient) ListReservations(ctx context.Context, req *reservationpb.ListReservationsRequest, opts ...gax.CallOption) *ReservationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListReservations[0:len((*c.CallOptions).ListReservations):len((*c.CallOptions).ListReservations)], opts...)
 	it := &ReservationIterator{}
@@ -707,6 +709,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetReservation[0:len((*c.CallOptions).GetReservation):len((*c.CallOptions).GetReservation)], opts...)
 	var resp *reservationpb.Reservation
@@ -728,6 +731,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteReservation[0:len((*c.CallOptions).DeleteReservation):len((*c.CallOptions).DeleteReservation)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -745,6 +749,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "reservation.name", url.QueryEscape(req.GetReservation().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateReservation[0:len((*c.CallOptions).UpdateReservation):len((*c.CallOptions).UpdateReservation)], opts...)
 	var resp *reservationpb.Reservation
@@ -766,6 +771,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCapacityCommitment[0:len((*c.CallOptions).CreateCapacityCommitment):len((*c.CallOptions).CreateCapacityCommitment)], opts...)
 	var resp *reservationpb.CapacityCommitment
@@ -782,6 +788,7 @@
 
 func (c *gRPCClient) ListCapacityCommitments(ctx context.Context, req *reservationpb.ListCapacityCommitmentsRequest, opts ...gax.CallOption) *CapacityCommitmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCapacityCommitments[0:len((*c.CallOptions).ListCapacityCommitments):len((*c.CallOptions).ListCapacityCommitments)], opts...)
 	it := &CapacityCommitmentIterator{}
@@ -831,6 +838,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCapacityCommitment[0:len((*c.CallOptions).GetCapacityCommitment):len((*c.CallOptions).GetCapacityCommitment)], opts...)
 	var resp *reservationpb.CapacityCommitment
@@ -852,6 +860,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteCapacityCommitment[0:len((*c.CallOptions).DeleteCapacityCommitment):len((*c.CallOptions).DeleteCapacityCommitment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -869,6 +878,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "capacity_commitment.name", url.QueryEscape(req.GetCapacityCommitment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCapacityCommitment[0:len((*c.CallOptions).UpdateCapacityCommitment):len((*c.CallOptions).UpdateCapacityCommitment)], opts...)
 	var resp *reservationpb.CapacityCommitment
@@ -890,6 +900,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SplitCapacityCommitment[0:len((*c.CallOptions).SplitCapacityCommitment):len((*c.CallOptions).SplitCapacityCommitment)], opts...)
 	var resp *reservationpb.SplitCapacityCommitmentResponse
@@ -911,6 +922,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MergeCapacityCommitments[0:len((*c.CallOptions).MergeCapacityCommitments):len((*c.CallOptions).MergeCapacityCommitments)], opts...)
 	var resp *reservationpb.CapacityCommitment
@@ -932,6 +944,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAssignment[0:len((*c.CallOptions).CreateAssignment):len((*c.CallOptions).CreateAssignment)], opts...)
 	var resp *reservationpb.Assignment
@@ -948,6 +961,7 @@
 
 func (c *gRPCClient) ListAssignments(ctx context.Context, req *reservationpb.ListAssignmentsRequest, opts ...gax.CallOption) *AssignmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAssignments[0:len((*c.CallOptions).ListAssignments):len((*c.CallOptions).ListAssignments)], opts...)
 	it := &AssignmentIterator{}
@@ -997,6 +1011,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAssignment[0:len((*c.CallOptions).DeleteAssignment):len((*c.CallOptions).DeleteAssignment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1009,6 +1024,7 @@
 
 func (c *gRPCClient) SearchAssignments(ctx context.Context, req *reservationpb.SearchAssignmentsRequest, opts ...gax.CallOption) *AssignmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchAssignments[0:len((*c.CallOptions).SearchAssignments):len((*c.CallOptions).SearchAssignments)], opts...)
 	it := &AssignmentIterator{}
@@ -1053,6 +1069,7 @@
 
 func (c *gRPCClient) SearchAllAssignments(ctx context.Context, req *reservationpb.SearchAllAssignmentsRequest, opts ...gax.CallOption) *AssignmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchAllAssignments[0:len((*c.CallOptions).SearchAllAssignments):len((*c.CallOptions).SearchAllAssignments)], opts...)
 	it := &AssignmentIterator{}
@@ -1102,6 +1119,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MoveAssignment[0:len((*c.CallOptions).MoveAssignment):len((*c.CallOptions).MoveAssignment)], opts...)
 	var resp *reservationpb.Assignment
@@ -1123,6 +1141,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBiReservation[0:len((*c.CallOptions).GetBiReservation):len((*c.CallOptions).GetBiReservation)], opts...)
 	var resp *reservationpb.BiReservation
@@ -1144,6 +1163,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "bi_reservation.name", url.QueryEscape(req.GetBiReservation().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateBiReservation[0:len((*c.CallOptions).UpdateBiReservation):len((*c.CallOptions).UpdateBiReservation)], opts...)
 	var resp *reservationpb.BiReservation
diff --git a/bigquery/reservation/apiv1/version.go b/bigquery/reservation/apiv1/version.go
new file mode 100644
index 0000000..8e37080
--- /dev/null
+++ b/bigquery/reservation/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package reservation
+
+import "cloud.google.com/go/bigquery/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/bigquery/reservation/apiv1beta1/doc.go b/bigquery/reservation/apiv1beta1/doc.go
index fd63d70..084fcc1 100644
--- a/bigquery/reservation/apiv1beta1/doc.go
+++ b/bigquery/reservation/apiv1beta1/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/reservation/apiv1beta1/reservation_client.go b/bigquery/reservation/apiv1beta1/reservation_client.go
index 015fb47..d0fe4df 100644
--- a/bigquery/reservation/apiv1beta1/reservation_client.go
+++ b/bigquery/reservation/apiv1beta1/reservation_client.go
@@ -587,7 +587,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -604,6 +604,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateReservation[0:len((*c.CallOptions).CreateReservation):len((*c.CallOptions).CreateReservation)], opts...)
 	var resp *reservationpb.Reservation
@@ -620,6 +621,7 @@
 
 func (c *gRPCClient) ListReservations(ctx context.Context, req *reservationpb.ListReservationsRequest, opts ...gax.CallOption) *ReservationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListReservations[0:len((*c.CallOptions).ListReservations):len((*c.CallOptions).ListReservations)], opts...)
 	it := &ReservationIterator{}
@@ -669,6 +671,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetReservation[0:len((*c.CallOptions).GetReservation):len((*c.CallOptions).GetReservation)], opts...)
 	var resp *reservationpb.Reservation
@@ -690,6 +693,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteReservation[0:len((*c.CallOptions).DeleteReservation):len((*c.CallOptions).DeleteReservation)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -707,6 +711,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "reservation.name", url.QueryEscape(req.GetReservation().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateReservation[0:len((*c.CallOptions).UpdateReservation):len((*c.CallOptions).UpdateReservation)], opts...)
 	var resp *reservationpb.Reservation
@@ -728,6 +733,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCapacityCommitment[0:len((*c.CallOptions).CreateCapacityCommitment):len((*c.CallOptions).CreateCapacityCommitment)], opts...)
 	var resp *reservationpb.CapacityCommitment
@@ -744,6 +750,7 @@
 
 func (c *gRPCClient) ListCapacityCommitments(ctx context.Context, req *reservationpb.ListCapacityCommitmentsRequest, opts ...gax.CallOption) *CapacityCommitmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCapacityCommitments[0:len((*c.CallOptions).ListCapacityCommitments):len((*c.CallOptions).ListCapacityCommitments)], opts...)
 	it := &CapacityCommitmentIterator{}
@@ -793,6 +800,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCapacityCommitment[0:len((*c.CallOptions).GetCapacityCommitment):len((*c.CallOptions).GetCapacityCommitment)], opts...)
 	var resp *reservationpb.CapacityCommitment
@@ -814,6 +822,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteCapacityCommitment[0:len((*c.CallOptions).DeleteCapacityCommitment):len((*c.CallOptions).DeleteCapacityCommitment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -831,6 +840,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "capacity_commitment.name", url.QueryEscape(req.GetCapacityCommitment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCapacityCommitment[0:len((*c.CallOptions).UpdateCapacityCommitment):len((*c.CallOptions).UpdateCapacityCommitment)], opts...)
 	var resp *reservationpb.CapacityCommitment
@@ -852,6 +862,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SplitCapacityCommitment[0:len((*c.CallOptions).SplitCapacityCommitment):len((*c.CallOptions).SplitCapacityCommitment)], opts...)
 	var resp *reservationpb.SplitCapacityCommitmentResponse
@@ -873,6 +884,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MergeCapacityCommitments[0:len((*c.CallOptions).MergeCapacityCommitments):len((*c.CallOptions).MergeCapacityCommitments)], opts...)
 	var resp *reservationpb.CapacityCommitment
@@ -894,6 +906,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAssignment[0:len((*c.CallOptions).CreateAssignment):len((*c.CallOptions).CreateAssignment)], opts...)
 	var resp *reservationpb.Assignment
@@ -910,6 +923,7 @@
 
 func (c *gRPCClient) ListAssignments(ctx context.Context, req *reservationpb.ListAssignmentsRequest, opts ...gax.CallOption) *AssignmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAssignments[0:len((*c.CallOptions).ListAssignments):len((*c.CallOptions).ListAssignments)], opts...)
 	it := &AssignmentIterator{}
@@ -959,6 +973,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAssignment[0:len((*c.CallOptions).DeleteAssignment):len((*c.CallOptions).DeleteAssignment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -971,6 +986,7 @@
 
 func (c *gRPCClient) SearchAssignments(ctx context.Context, req *reservationpb.SearchAssignmentsRequest, opts ...gax.CallOption) *AssignmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchAssignments[0:len((*c.CallOptions).SearchAssignments):len((*c.CallOptions).SearchAssignments)], opts...)
 	it := &AssignmentIterator{}
@@ -1020,6 +1036,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MoveAssignment[0:len((*c.CallOptions).MoveAssignment):len((*c.CallOptions).MoveAssignment)], opts...)
 	var resp *reservationpb.Assignment
@@ -1041,6 +1058,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBiReservation[0:len((*c.CallOptions).GetBiReservation):len((*c.CallOptions).GetBiReservation)], opts...)
 	var resp *reservationpb.BiReservation
@@ -1062,6 +1080,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "reservation.name", url.QueryEscape(req.GetReservation().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateBiReservation[0:len((*c.CallOptions).UpdateBiReservation):len((*c.CallOptions).UpdateBiReservation)], opts...)
 	var resp *reservationpb.BiReservation
diff --git a/bigquery/reservation/apiv1beta1/version.go b/bigquery/reservation/apiv1beta1/version.go
new file mode 100644
index 0000000..8e37080
--- /dev/null
+++ b/bigquery/reservation/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package reservation
+
+import "cloud.google.com/go/bigquery/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/bigquery/storage/apiv1/big_query_read_client.go b/bigquery/storage/apiv1/big_query_read_client.go
index e37910e..3e33ca7 100644
--- a/bigquery/storage/apiv1/big_query_read_client.go
+++ b/bigquery/storage/apiv1/big_query_read_client.go
@@ -262,7 +262,7 @@
 // use by Google-written clients.
 func (c *bigQueryReadGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -279,6 +279,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "read_session.table", url.QueryEscape(req.GetReadSession().GetTable())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateReadSession[0:len((*c.CallOptions).CreateReadSession):len((*c.CallOptions).CreateReadSession)], opts...)
 	var resp *storagepb.ReadSession
@@ -295,6 +296,7 @@
 
 func (c *bigQueryReadGRPCClient) ReadRows(ctx context.Context, req *storagepb.ReadRowsRequest, opts ...gax.CallOption) (storagepb.BigQueryRead_ReadRowsClient, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "read_stream", url.QueryEscape(req.GetReadStream())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	var resp storagepb.BigQueryRead_ReadRowsClient
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -315,6 +317,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SplitReadStream[0:len((*c.CallOptions).SplitReadStream):len((*c.CallOptions).SplitReadStream)], opts...)
 	var resp *storagepb.SplitReadStreamResponse
diff --git a/bigquery/storage/apiv1/big_query_write_client.go b/bigquery/storage/apiv1/big_query_write_client.go
index 737cdf6..eaf94b6 100644
--- a/bigquery/storage/apiv1/big_query_write_client.go
+++ b/bigquery/storage/apiv1/big_query_write_client.go
@@ -338,7 +338,7 @@
 // use by Google-written clients.
 func (c *bigQueryWriteGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -355,6 +355,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateWriteStream[0:len((*c.CallOptions).CreateWriteStream):len((*c.CallOptions).CreateWriteStream)], opts...)
 	var resp *storagepb.WriteStream
@@ -391,6 +392,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetWriteStream[0:len((*c.CallOptions).GetWriteStream):len((*c.CallOptions).GetWriteStream)], opts...)
 	var resp *storagepb.WriteStream
@@ -412,6 +414,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FinalizeWriteStream[0:len((*c.CallOptions).FinalizeWriteStream):len((*c.CallOptions).FinalizeWriteStream)], opts...)
 	var resp *storagepb.FinalizeWriteStreamResponse
@@ -433,6 +436,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCommitWriteStreams[0:len((*c.CallOptions).BatchCommitWriteStreams):len((*c.CallOptions).BatchCommitWriteStreams)], opts...)
 	var resp *storagepb.BatchCommitWriteStreamsResponse
@@ -454,6 +458,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "write_stream", url.QueryEscape(req.GetWriteStream())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FlushRows[0:len((*c.CallOptions).FlushRows):len((*c.CallOptions).FlushRows)], opts...)
 	var resp *storagepb.FlushRowsResponse
diff --git a/bigquery/storage/apiv1/doc.go b/bigquery/storage/apiv1/doc.go
index 6c5db15..53df693 100644
--- a/bigquery/storage/apiv1/doc.go
+++ b/bigquery/storage/apiv1/doc.go
@@ -82,7 +82,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/storage/apiv1/version.go b/bigquery/storage/apiv1/version.go
new file mode 100644
index 0000000..c64bb3d
--- /dev/null
+++ b/bigquery/storage/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package storage
+
+import "cloud.google.com/go/bigquery/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/bigquery/storage/apiv1beta1/big_query_storage_client.go b/bigquery/storage/apiv1beta1/big_query_storage_client.go
index 02fd79f..7a39ae1 100644
--- a/bigquery/storage/apiv1beta1/big_query_storage_client.go
+++ b/bigquery/storage/apiv1beta1/big_query_storage_client.go
@@ -311,7 +311,7 @@
 // use by Google-written clients.
 func (c *bigQueryStorageGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -328,6 +328,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "table_reference.project_id", url.QueryEscape(req.GetTableReference().GetProjectId()), "table_reference.dataset_id", url.QueryEscape(req.GetTableReference().GetDatasetId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateReadSession[0:len((*c.CallOptions).CreateReadSession):len((*c.CallOptions).CreateReadSession)], opts...)
 	var resp *storagepb.ReadSession
@@ -344,6 +345,7 @@
 
 func (c *bigQueryStorageGRPCClient) ReadRows(ctx context.Context, req *storagepb.ReadRowsRequest, opts ...gax.CallOption) (storagepb.BigQueryStorage_ReadRowsClient, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "read_position.stream.name", url.QueryEscape(req.GetReadPosition().GetStream().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	var resp storagepb.BigQueryStorage_ReadRowsClient
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -364,6 +366,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session.name", url.QueryEscape(req.GetSession().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCreateReadSessionStreams[0:len((*c.CallOptions).BatchCreateReadSessionStreams):len((*c.CallOptions).BatchCreateReadSessionStreams)], opts...)
 	var resp *storagepb.BatchCreateReadSessionStreamsResponse
@@ -385,6 +388,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "stream.name", url.QueryEscape(req.GetStream().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FinalizeStream[0:len((*c.CallOptions).FinalizeStream):len((*c.CallOptions).FinalizeStream)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -402,6 +406,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "original_stream.name", url.QueryEscape(req.GetOriginalStream().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SplitReadStream[0:len((*c.CallOptions).SplitReadStream):len((*c.CallOptions).SplitReadStream)], opts...)
 	var resp *storagepb.SplitReadStreamResponse
diff --git a/bigquery/storage/apiv1beta1/doc.go b/bigquery/storage/apiv1beta1/doc.go
index 872c576..7ef3da3 100644
--- a/bigquery/storage/apiv1beta1/doc.go
+++ b/bigquery/storage/apiv1beta1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/storage/apiv1beta1/version.go b/bigquery/storage/apiv1beta1/version.go
new file mode 100644
index 0000000..c64bb3d
--- /dev/null
+++ b/bigquery/storage/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package storage
+
+import "cloud.google.com/go/bigquery/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/bigquery/storage/apiv1beta2/big_query_read_client.go b/bigquery/storage/apiv1beta2/big_query_read_client.go
index e5bd3cc..53cb1c8 100644
--- a/bigquery/storage/apiv1beta2/big_query_read_client.go
+++ b/bigquery/storage/apiv1beta2/big_query_read_client.go
@@ -268,7 +268,7 @@
 // use by Google-written clients.
 func (c *bigQueryReadGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -285,6 +285,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "read_session.table", url.QueryEscape(req.GetReadSession().GetTable())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateReadSession[0:len((*c.CallOptions).CreateReadSession):len((*c.CallOptions).CreateReadSession)], opts...)
 	var resp *storagepb.ReadSession
@@ -301,6 +302,7 @@
 
 func (c *bigQueryReadGRPCClient) ReadRows(ctx context.Context, req *storagepb.ReadRowsRequest, opts ...gax.CallOption) (storagepb.BigQueryRead_ReadRowsClient, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "read_stream", url.QueryEscape(req.GetReadStream())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	var resp storagepb.BigQueryRead_ReadRowsClient
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -321,6 +323,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SplitReadStream[0:len((*c.CallOptions).SplitReadStream):len((*c.CallOptions).SplitReadStream)], opts...)
 	var resp *storagepb.SplitReadStreamResponse
diff --git a/bigquery/storage/apiv1beta2/big_query_write_client.go b/bigquery/storage/apiv1beta2/big_query_write_client.go
index 311662e..8ea4a89 100644
--- a/bigquery/storage/apiv1beta2/big_query_write_client.go
+++ b/bigquery/storage/apiv1beta2/big_query_write_client.go
@@ -319,7 +319,7 @@
 // use by Google-written clients.
 func (c *bigQueryWriteGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -336,6 +336,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateWriteStream[0:len((*c.CallOptions).CreateWriteStream):len((*c.CallOptions).CreateWriteStream)], opts...)
 	var resp *storagepb.WriteStream
@@ -372,6 +373,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetWriteStream[0:len((*c.CallOptions).GetWriteStream):len((*c.CallOptions).GetWriteStream)], opts...)
 	var resp *storagepb.WriteStream
@@ -393,6 +395,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FinalizeWriteStream[0:len((*c.CallOptions).FinalizeWriteStream):len((*c.CallOptions).FinalizeWriteStream)], opts...)
 	var resp *storagepb.FinalizeWriteStreamResponse
@@ -414,6 +417,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCommitWriteStreams[0:len((*c.CallOptions).BatchCommitWriteStreams):len((*c.CallOptions).BatchCommitWriteStreams)], opts...)
 	var resp *storagepb.BatchCommitWriteStreamsResponse
@@ -435,6 +439,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "write_stream", url.QueryEscape(req.GetWriteStream())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FlushRows[0:len((*c.CallOptions).FlushRows):len((*c.CallOptions).FlushRows)], opts...)
 	var resp *storagepb.FlushRowsResponse
diff --git a/bigquery/storage/apiv1beta2/doc.go b/bigquery/storage/apiv1beta2/doc.go
index 65fdf0c..cb304e6 100644
--- a/bigquery/storage/apiv1beta2/doc.go
+++ b/bigquery/storage/apiv1beta2/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/bigquery/storage/apiv1beta2/version.go b/bigquery/storage/apiv1beta2/version.go
new file mode 100644
index 0000000..c64bb3d
--- /dev/null
+++ b/bigquery/storage/apiv1beta2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package storage
+
+import "cloud.google.com/go/bigquery/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/billing/apiv1/cloud_billing_client.go b/billing/apiv1/cloud_billing_client.go
index 5848849..7e0e6d8 100644
--- a/billing/apiv1/cloud_billing_client.go
+++ b/billing/apiv1/cloud_billing_client.go
@@ -410,7 +410,7 @@
 // use by Google-written clients.
 func (c *cloudBillingGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -427,6 +427,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBillingAccount[0:len((*c.CallOptions).GetBillingAccount):len((*c.CallOptions).GetBillingAccount)], opts...)
 	var resp *billingpb.BillingAccount
@@ -491,6 +492,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateBillingAccount[0:len((*c.CallOptions).UpdateBillingAccount):len((*c.CallOptions).UpdateBillingAccount)], opts...)
 	var resp *billingpb.BillingAccount
@@ -527,6 +529,7 @@
 
 func (c *cloudBillingGRPCClient) ListProjectBillingInfo(ctx context.Context, req *billingpb.ListProjectBillingInfoRequest, opts ...gax.CallOption) *ProjectBillingInfoIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListProjectBillingInfo[0:len((*c.CallOptions).ListProjectBillingInfo):len((*c.CallOptions).ListProjectBillingInfo)], opts...)
 	it := &ProjectBillingInfoIterator{}
@@ -576,6 +579,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetProjectBillingInfo[0:len((*c.CallOptions).GetProjectBillingInfo):len((*c.CallOptions).GetProjectBillingInfo)], opts...)
 	var resp *billingpb.ProjectBillingInfo
@@ -597,6 +601,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateProjectBillingInfo[0:len((*c.CallOptions).UpdateProjectBillingInfo):len((*c.CallOptions).UpdateProjectBillingInfo)], opts...)
 	var resp *billingpb.ProjectBillingInfo
@@ -618,6 +623,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -639,6 +645,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -660,6 +667,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/billing/apiv1/cloud_catalog_client.go b/billing/apiv1/cloud_catalog_client.go
index 49aba19..525742b 100644
--- a/billing/apiv1/cloud_catalog_client.go
+++ b/billing/apiv1/cloud_catalog_client.go
@@ -187,7 +187,7 @@
 // use by Google-written clients.
 func (c *cloudCatalogGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -242,6 +242,7 @@
 
 func (c *cloudCatalogGRPCClient) ListSkus(ctx context.Context, req *billingpb.ListSkusRequest, opts ...gax.CallOption) *SkuIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSkus[0:len((*c.CallOptions).ListSkus):len((*c.CallOptions).ListSkus)], opts...)
 	it := &SkuIterator{}
diff --git a/billing/apiv1/doc.go b/billing/apiv1/doc.go
index 0988fba..bc1c0f4 100644
--- a/billing/apiv1/doc.go
+++ b/billing/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/billing/apiv1/version.go b/billing/apiv1/version.go
new file mode 100644
index 0000000..d6f9879
--- /dev/null
+++ b/billing/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package billing
+
+import "cloud.google.com/go/billing/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/billing/budgets/apiv1/budget_client.go b/billing/budgets/apiv1/budget_client.go
index 9918e29..997819e 100644
--- a/billing/budgets/apiv1/budget_client.go
+++ b/billing/budgets/apiv1/budget_client.go
@@ -271,7 +271,7 @@
 // use by Google-written clients.
 func (c *budgetGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -288,6 +288,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBudget[0:len((*c.CallOptions).CreateBudget):len((*c.CallOptions).CreateBudget)], opts...)
 	var resp *budgetspb.Budget
@@ -309,6 +310,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "budget.name", url.QueryEscape(req.GetBudget().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateBudget[0:len((*c.CallOptions).UpdateBudget):len((*c.CallOptions).UpdateBudget)], opts...)
 	var resp *budgetspb.Budget
@@ -330,6 +332,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBudget[0:len((*c.CallOptions).GetBudget):len((*c.CallOptions).GetBudget)], opts...)
 	var resp *budgetspb.Budget
@@ -346,6 +349,7 @@
 
 func (c *budgetGRPCClient) ListBudgets(ctx context.Context, req *budgetspb.ListBudgetsRequest, opts ...gax.CallOption) *BudgetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBudgets[0:len((*c.CallOptions).ListBudgets):len((*c.CallOptions).ListBudgets)], opts...)
 	it := &BudgetIterator{}
@@ -395,6 +399,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteBudget[0:len((*c.CallOptions).DeleteBudget):len((*c.CallOptions).DeleteBudget)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/billing/budgets/apiv1/doc.go b/billing/budgets/apiv1/doc.go
index ff4a57b..b8e19df 100644
--- a/billing/budgets/apiv1/doc.go
+++ b/billing/budgets/apiv1/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/billing/budgets/apiv1/version.go b/billing/budgets/apiv1/version.go
new file mode 100644
index 0000000..2d35515
--- /dev/null
+++ b/billing/budgets/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package budgets
+
+import "cloud.google.com/go/billing/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/billing/budgets/apiv1beta1/budget_client.go b/billing/budgets/apiv1beta1/budget_client.go
index f8ea3ff..bff366a 100644
--- a/billing/budgets/apiv1beta1/budget_client.go
+++ b/billing/budgets/apiv1beta1/budget_client.go
@@ -271,7 +271,7 @@
 // use by Google-written clients.
 func (c *budgetGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -288,6 +288,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBudget[0:len((*c.CallOptions).CreateBudget):len((*c.CallOptions).CreateBudget)], opts...)
 	var resp *budgetspb.Budget
@@ -309,6 +310,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "budget.name", url.QueryEscape(req.GetBudget().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateBudget[0:len((*c.CallOptions).UpdateBudget):len((*c.CallOptions).UpdateBudget)], opts...)
 	var resp *budgetspb.Budget
@@ -330,6 +332,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBudget[0:len((*c.CallOptions).GetBudget):len((*c.CallOptions).GetBudget)], opts...)
 	var resp *budgetspb.Budget
@@ -346,6 +349,7 @@
 
 func (c *budgetGRPCClient) ListBudgets(ctx context.Context, req *budgetspb.ListBudgetsRequest, opts ...gax.CallOption) *BudgetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBudgets[0:len((*c.CallOptions).ListBudgets):len((*c.CallOptions).ListBudgets)], opts...)
 	it := &BudgetIterator{}
@@ -395,6 +399,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteBudget[0:len((*c.CallOptions).DeleteBudget):len((*c.CallOptions).DeleteBudget)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/billing/budgets/apiv1beta1/doc.go b/billing/budgets/apiv1beta1/doc.go
index 2e986d4..d5f0f16 100644
--- a/billing/budgets/apiv1beta1/doc.go
+++ b/billing/budgets/apiv1beta1/doc.go
@@ -88,7 +88,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/billing/budgets/apiv1beta1/version.go b/billing/budgets/apiv1beta1/version.go
new file mode 100644
index 0000000..2d35515
--- /dev/null
+++ b/billing/budgets/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package budgets
+
+import "cloud.google.com/go/billing/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/binaryauthorization/apiv1beta1/binauthz_management_service_v1_beta1_client.go b/binaryauthorization/apiv1beta1/binauthz_management_service_v1_beta1_client.go
index aa3d775..c2103c2 100644
--- a/binaryauthorization/apiv1beta1/binauthz_management_service_v1_beta1_client.go
+++ b/binaryauthorization/apiv1beta1/binauthz_management_service_v1_beta1_client.go
@@ -322,7 +322,7 @@
 // use by Google-written clients.
 func (c *binauthzManagementServiceV1Beta1GRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -339,6 +339,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPolicy[0:len((*c.CallOptions).GetPolicy):len((*c.CallOptions).GetPolicy)], opts...)
 	var resp *binaryauthorizationpb.Policy
@@ -360,6 +361,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "policy.name", url.QueryEscape(req.GetPolicy().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdatePolicy[0:len((*c.CallOptions).UpdatePolicy):len((*c.CallOptions).UpdatePolicy)], opts...)
 	var resp *binaryauthorizationpb.Policy
@@ -381,6 +383,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAttestor[0:len((*c.CallOptions).CreateAttestor):len((*c.CallOptions).CreateAttestor)], opts...)
 	var resp *binaryauthorizationpb.Attestor
@@ -402,6 +405,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAttestor[0:len((*c.CallOptions).GetAttestor):len((*c.CallOptions).GetAttestor)], opts...)
 	var resp *binaryauthorizationpb.Attestor
@@ -423,6 +427,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "attestor.name", url.QueryEscape(req.GetAttestor().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAttestor[0:len((*c.CallOptions).UpdateAttestor):len((*c.CallOptions).UpdateAttestor)], opts...)
 	var resp *binaryauthorizationpb.Attestor
@@ -439,6 +444,7 @@
 
 func (c *binauthzManagementServiceV1Beta1GRPCClient) ListAttestors(ctx context.Context, req *binaryauthorizationpb.ListAttestorsRequest, opts ...gax.CallOption) *AttestorIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAttestors[0:len((*c.CallOptions).ListAttestors):len((*c.CallOptions).ListAttestors)], opts...)
 	it := &AttestorIterator{}
@@ -488,6 +494,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAttestor[0:len((*c.CallOptions).DeleteAttestor):len((*c.CallOptions).DeleteAttestor)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/binaryauthorization/apiv1beta1/doc.go b/binaryauthorization/apiv1beta1/doc.go
index 40144f6..98b6f76 100644
--- a/binaryauthorization/apiv1beta1/doc.go
+++ b/binaryauthorization/apiv1beta1/doc.go
@@ -88,7 +88,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/binaryauthorization/apiv1beta1/system_policy_v1_beta1_client.go b/binaryauthorization/apiv1beta1/system_policy_v1_beta1_client.go
index 3361df1..5b0ac4b 100644
--- a/binaryauthorization/apiv1beta1/system_policy_v1_beta1_client.go
+++ b/binaryauthorization/apiv1beta1/system_policy_v1_beta1_client.go
@@ -173,7 +173,7 @@
 // use by Google-written clients.
 func (c *systemPolicyV1Beta1GRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -185,6 +185,7 @@
 
 func (c *systemPolicyV1Beta1GRPCClient) GetSystemPolicy(ctx context.Context, req *binaryauthorizationpb.GetSystemPolicyRequest, opts ...gax.CallOption) (*binaryauthorizationpb.Policy, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSystemPolicy[0:len((*c.CallOptions).GetSystemPolicy):len((*c.CallOptions).GetSystemPolicy)], opts...)
 	var resp *binaryauthorizationpb.Policy
diff --git a/binaryauthorization/apiv1beta1/version.go b/binaryauthorization/apiv1beta1/version.go
new file mode 100644
index 0000000..eaf65c1
--- /dev/null
+++ b/binaryauthorization/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package binaryauthorization
+
+import "cloud.google.com/go/binaryauthorization/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/channel/apiv1/cloud_channel_client.go b/channel/apiv1/cloud_channel_client.go
index 995455b..eaf44bd 100644
--- a/channel/apiv1/cloud_channel_client.go
+++ b/channel/apiv1/cloud_channel_client.go
@@ -1526,7 +1526,7 @@
 // use by Google-written clients.
 func (c *cloudChannelGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -1538,6 +1538,7 @@
 
 func (c *cloudChannelGRPCClient) ListCustomers(ctx context.Context, req *channelpb.ListCustomersRequest, opts ...gax.CallOption) *CustomerIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCustomers[0:len((*c.CallOptions).ListCustomers):len((*c.CallOptions).ListCustomers)], opts...)
 	it := &CustomerIterator{}
@@ -1587,6 +1588,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCustomer[0:len((*c.CallOptions).GetCustomer):len((*c.CallOptions).GetCustomer)], opts...)
 	var resp *channelpb.Customer
@@ -1608,6 +1610,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CheckCloudIdentityAccountsExist[0:len((*c.CallOptions).CheckCloudIdentityAccountsExist):len((*c.CallOptions).CheckCloudIdentityAccountsExist)], opts...)
 	var resp *channelpb.CheckCloudIdentityAccountsExistResponse
@@ -1629,6 +1632,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCustomer[0:len((*c.CallOptions).CreateCustomer):len((*c.CallOptions).CreateCustomer)], opts...)
 	var resp *channelpb.Customer
@@ -1650,6 +1654,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "customer.name", url.QueryEscape(req.GetCustomer().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCustomer[0:len((*c.CallOptions).UpdateCustomer):len((*c.CallOptions).UpdateCustomer)], opts...)
 	var resp *channelpb.Customer
@@ -1671,6 +1676,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteCustomer[0:len((*c.CallOptions).DeleteCustomer):len((*c.CallOptions).DeleteCustomer)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1688,6 +1694,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportCustomer[0:len((*c.CallOptions).ImportCustomer):len((*c.CallOptions).ImportCustomer)], opts...)
 	var resp *channelpb.Customer
@@ -1709,6 +1716,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "customer", url.QueryEscape(req.GetCustomer())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ProvisionCloudIdentity[0:len((*c.CallOptions).ProvisionCloudIdentity):len((*c.CallOptions).ProvisionCloudIdentity)], opts...)
 	var resp *longrunningpb.Operation
@@ -1727,6 +1735,7 @@
 
 func (c *cloudChannelGRPCClient) ListEntitlements(ctx context.Context, req *channelpb.ListEntitlementsRequest, opts ...gax.CallOption) *EntitlementIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEntitlements[0:len((*c.CallOptions).ListEntitlements):len((*c.CallOptions).ListEntitlements)], opts...)
 	it := &EntitlementIterator{}
@@ -1771,6 +1780,7 @@
 
 func (c *cloudChannelGRPCClient) ListTransferableSkus(ctx context.Context, req *channelpb.ListTransferableSkusRequest, opts ...gax.CallOption) *TransferableSkuIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTransferableSkus[0:len((*c.CallOptions).ListTransferableSkus):len((*c.CallOptions).ListTransferableSkus)], opts...)
 	it := &TransferableSkuIterator{}
@@ -1815,6 +1825,7 @@
 
 func (c *cloudChannelGRPCClient) ListTransferableOffers(ctx context.Context, req *channelpb.ListTransferableOffersRequest, opts ...gax.CallOption) *TransferableOfferIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTransferableOffers[0:len((*c.CallOptions).ListTransferableOffers):len((*c.CallOptions).ListTransferableOffers)], opts...)
 	it := &TransferableOfferIterator{}
@@ -1864,6 +1875,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEntitlement[0:len((*c.CallOptions).GetEntitlement):len((*c.CallOptions).GetEntitlement)], opts...)
 	var resp *channelpb.Entitlement
@@ -1885,6 +1897,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEntitlement[0:len((*c.CallOptions).CreateEntitlement):len((*c.CallOptions).CreateEntitlement)], opts...)
 	var resp *longrunningpb.Operation
@@ -1908,6 +1921,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ChangeParameters[0:len((*c.CallOptions).ChangeParameters):len((*c.CallOptions).ChangeParameters)], opts...)
 	var resp *longrunningpb.Operation
@@ -1931,6 +1945,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ChangeRenewalSettings[0:len((*c.CallOptions).ChangeRenewalSettings):len((*c.CallOptions).ChangeRenewalSettings)], opts...)
 	var resp *longrunningpb.Operation
@@ -1954,6 +1969,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ChangeOffer[0:len((*c.CallOptions).ChangeOffer):len((*c.CallOptions).ChangeOffer)], opts...)
 	var resp *longrunningpb.Operation
@@ -1977,6 +1993,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartPaidService[0:len((*c.CallOptions).StartPaidService):len((*c.CallOptions).StartPaidService)], opts...)
 	var resp *longrunningpb.Operation
@@ -2000,6 +2017,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SuspendEntitlement[0:len((*c.CallOptions).SuspendEntitlement):len((*c.CallOptions).SuspendEntitlement)], opts...)
 	var resp *longrunningpb.Operation
@@ -2023,6 +2041,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelEntitlement[0:len((*c.CallOptions).CancelEntitlement):len((*c.CallOptions).CancelEntitlement)], opts...)
 	var resp *longrunningpb.Operation
@@ -2046,6 +2065,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ActivateEntitlement[0:len((*c.CallOptions).ActivateEntitlement):len((*c.CallOptions).ActivateEntitlement)], opts...)
 	var resp *longrunningpb.Operation
@@ -2069,6 +2089,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TransferEntitlements[0:len((*c.CallOptions).TransferEntitlements):len((*c.CallOptions).TransferEntitlements)], opts...)
 	var resp *longrunningpb.Operation
@@ -2092,6 +2113,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TransferEntitlementsToGoogle[0:len((*c.CallOptions).TransferEntitlementsToGoogle):len((*c.CallOptions).TransferEntitlementsToGoogle)], opts...)
 	var resp *longrunningpb.Operation
@@ -2110,6 +2132,7 @@
 
 func (c *cloudChannelGRPCClient) ListChannelPartnerLinks(ctx context.Context, req *channelpb.ListChannelPartnerLinksRequest, opts ...gax.CallOption) *ChannelPartnerLinkIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListChannelPartnerLinks[0:len((*c.CallOptions).ListChannelPartnerLinks):len((*c.CallOptions).ListChannelPartnerLinks)], opts...)
 	it := &ChannelPartnerLinkIterator{}
@@ -2159,6 +2182,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetChannelPartnerLink[0:len((*c.CallOptions).GetChannelPartnerLink):len((*c.CallOptions).GetChannelPartnerLink)], opts...)
 	var resp *channelpb.ChannelPartnerLink
@@ -2180,6 +2204,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateChannelPartnerLink[0:len((*c.CallOptions).CreateChannelPartnerLink):len((*c.CallOptions).CreateChannelPartnerLink)], opts...)
 	var resp *channelpb.ChannelPartnerLink
@@ -2201,6 +2226,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateChannelPartnerLink[0:len((*c.CallOptions).UpdateChannelPartnerLink):len((*c.CallOptions).UpdateChannelPartnerLink)], opts...)
 	var resp *channelpb.ChannelPartnerLink
@@ -2222,6 +2248,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entitlement", url.QueryEscape(req.GetEntitlement())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LookupOffer[0:len((*c.CallOptions).LookupOffer):len((*c.CallOptions).LookupOffer)], opts...)
 	var resp *channelpb.Offer
@@ -2281,6 +2308,7 @@
 
 func (c *cloudChannelGRPCClient) ListSkus(ctx context.Context, req *channelpb.ListSkusRequest, opts ...gax.CallOption) *SkuIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSkus[0:len((*c.CallOptions).ListSkus):len((*c.CallOptions).ListSkus)], opts...)
 	it := &SkuIterator{}
@@ -2325,6 +2353,7 @@
 
 func (c *cloudChannelGRPCClient) ListOffers(ctx context.Context, req *channelpb.ListOffersRequest, opts ...gax.CallOption) *OfferIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListOffers[0:len((*c.CallOptions).ListOffers):len((*c.CallOptions).ListOffers)], opts...)
 	it := &OfferIterator{}
@@ -2369,6 +2398,7 @@
 
 func (c *cloudChannelGRPCClient) ListPurchasableSkus(ctx context.Context, req *channelpb.ListPurchasableSkusRequest, opts ...gax.CallOption) *PurchasableSkuIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "customer", url.QueryEscape(req.GetCustomer())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPurchasableSkus[0:len((*c.CallOptions).ListPurchasableSkus):len((*c.CallOptions).ListPurchasableSkus)], opts...)
 	it := &PurchasableSkuIterator{}
@@ -2413,6 +2443,7 @@
 
 func (c *cloudChannelGRPCClient) ListPurchasableOffers(ctx context.Context, req *channelpb.ListPurchasableOffersRequest, opts ...gax.CallOption) *PurchasableOfferIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "customer", url.QueryEscape(req.GetCustomer())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPurchasableOffers[0:len((*c.CallOptions).ListPurchasableOffers):len((*c.CallOptions).ListPurchasableOffers)], opts...)
 	it := &PurchasableOfferIterator{}
@@ -2462,6 +2493,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "account", url.QueryEscape(req.GetAccount())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RegisterSubscriber[0:len((*c.CallOptions).RegisterSubscriber):len((*c.CallOptions).RegisterSubscriber)], opts...)
 	var resp *channelpb.RegisterSubscriberResponse
@@ -2483,6 +2515,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "account", url.QueryEscape(req.GetAccount())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UnregisterSubscriber[0:len((*c.CallOptions).UnregisterSubscriber):len((*c.CallOptions).UnregisterSubscriber)], opts...)
 	var resp *channelpb.UnregisterSubscriberResponse
@@ -2499,6 +2532,7 @@
 
 func (c *cloudChannelGRPCClient) ListSubscribers(ctx context.Context, req *channelpb.ListSubscribersRequest, opts ...gax.CallOption) *StringIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "account", url.QueryEscape(req.GetAccount())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSubscribers[0:len((*c.CallOptions).ListSubscribers):len((*c.CallOptions).ListSubscribers)], opts...)
 	it := &StringIterator{}
diff --git a/channel/apiv1/doc.go b/channel/apiv1/doc.go
index 7981f32..13dd879 100644
--- a/channel/apiv1/doc.go
+++ b/channel/apiv1/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/channel/apiv1/version.go b/channel/apiv1/version.go
new file mode 100644
index 0000000..b2aebf5
--- /dev/null
+++ b/channel/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package channel
+
+import "cloud.google.com/go/channel/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/cloudbuild/apiv1/v2/cloud_build_client.go b/cloudbuild/apiv1/v2/cloud_build_client.go
index d76f0e6..51dfd8f 100644
--- a/cloudbuild/apiv1/v2/cloud_build_client.go
+++ b/cloudbuild/apiv1/v2/cloud_build_client.go
@@ -531,7 +531,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -548,6 +548,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBuild[0:len((*c.CallOptions).CreateBuild):len((*c.CallOptions).CreateBuild)], opts...)
 	var resp *longrunningpb.Operation
@@ -571,6 +572,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "id", url.QueryEscape(req.GetId()), "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBuild[0:len((*c.CallOptions).GetBuild):len((*c.CallOptions).GetBuild)], opts...)
 	var resp *cloudbuildpb.Build
@@ -587,6 +589,7 @@
 
 func (c *gRPCClient) ListBuilds(ctx context.Context, req *cloudbuildpb.ListBuildsRequest, opts ...gax.CallOption) *BuildIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBuilds[0:len((*c.CallOptions).ListBuilds):len((*c.CallOptions).ListBuilds)], opts...)
 	it := &BuildIterator{}
@@ -636,6 +639,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "id", url.QueryEscape(req.GetId()), "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelBuild[0:len((*c.CallOptions).CancelBuild):len((*c.CallOptions).CancelBuild)], opts...)
 	var resp *cloudbuildpb.Build
@@ -657,6 +661,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "id", url.QueryEscape(req.GetId()), "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RetryBuild[0:len((*c.CallOptions).RetryBuild):len((*c.CallOptions).RetryBuild)], opts...)
 	var resp *longrunningpb.Operation
@@ -675,6 +680,7 @@
 
 func (c *gRPCClient) ApproveBuild(ctx context.Context, req *cloudbuildpb.ApproveBuildRequest, opts ...gax.CallOption) (*ApproveBuildOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ApproveBuild[0:len((*c.CallOptions).ApproveBuild):len((*c.CallOptions).ApproveBuild)], opts...)
 	var resp *longrunningpb.Operation
@@ -698,6 +704,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBuildTrigger[0:len((*c.CallOptions).CreateBuildTrigger):len((*c.CallOptions).CreateBuildTrigger)], opts...)
 	var resp *cloudbuildpb.BuildTrigger
@@ -719,6 +726,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "trigger_id", url.QueryEscape(req.GetTriggerId()), "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBuildTrigger[0:len((*c.CallOptions).GetBuildTrigger):len((*c.CallOptions).GetBuildTrigger)], opts...)
 	var resp *cloudbuildpb.BuildTrigger
@@ -735,6 +743,7 @@
 
 func (c *gRPCClient) ListBuildTriggers(ctx context.Context, req *cloudbuildpb.ListBuildTriggersRequest, opts ...gax.CallOption) *BuildTriggerIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBuildTriggers[0:len((*c.CallOptions).ListBuildTriggers):len((*c.CallOptions).ListBuildTriggers)], opts...)
 	it := &BuildTriggerIterator{}
@@ -784,6 +793,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "trigger_id", url.QueryEscape(req.GetTriggerId()), "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteBuildTrigger[0:len((*c.CallOptions).DeleteBuildTrigger):len((*c.CallOptions).DeleteBuildTrigger)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -801,6 +811,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "trigger_id", url.QueryEscape(req.GetTriggerId()), "trigger.resource_name", url.QueryEscape(req.GetTrigger().GetResourceName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateBuildTrigger[0:len((*c.CallOptions).UpdateBuildTrigger):len((*c.CallOptions).UpdateBuildTrigger)], opts...)
 	var resp *cloudbuildpb.BuildTrigger
@@ -822,6 +833,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "trigger_id", url.QueryEscape(req.GetTriggerId()), "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunBuildTrigger[0:len((*c.CallOptions).RunBuildTrigger):len((*c.CallOptions).RunBuildTrigger)], opts...)
 	var resp *longrunningpb.Operation
@@ -840,6 +852,7 @@
 
 func (c *gRPCClient) ReceiveTriggerWebhook(ctx context.Context, req *cloudbuildpb.ReceiveTriggerWebhookRequest, opts ...gax.CallOption) (*cloudbuildpb.ReceiveTriggerWebhookResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "trigger", url.QueryEscape(req.GetTrigger()), "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReceiveTriggerWebhook[0:len((*c.CallOptions).ReceiveTriggerWebhook):len((*c.CallOptions).ReceiveTriggerWebhook)], opts...)
 	var resp *cloudbuildpb.ReceiveTriggerWebhookResponse
@@ -861,6 +874,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateWorkerPool[0:len((*c.CallOptions).CreateWorkerPool):len((*c.CallOptions).CreateWorkerPool)], opts...)
 	var resp *longrunningpb.Operation
@@ -884,6 +898,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetWorkerPool[0:len((*c.CallOptions).GetWorkerPool):len((*c.CallOptions).GetWorkerPool)], opts...)
 	var resp *cloudbuildpb.WorkerPool
@@ -905,6 +920,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteWorkerPool[0:len((*c.CallOptions).DeleteWorkerPool):len((*c.CallOptions).DeleteWorkerPool)], opts...)
 	var resp *longrunningpb.Operation
@@ -928,6 +944,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "worker_pool.name", url.QueryEscape(req.GetWorkerPool().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateWorkerPool[0:len((*c.CallOptions).UpdateWorkerPool):len((*c.CallOptions).UpdateWorkerPool)], opts...)
 	var resp *longrunningpb.Operation
@@ -946,6 +963,7 @@
 
 func (c *gRPCClient) ListWorkerPools(ctx context.Context, req *cloudbuildpb.ListWorkerPoolsRequest, opts ...gax.CallOption) *WorkerPoolIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListWorkerPools[0:len((*c.CallOptions).ListWorkerPools):len((*c.CallOptions).ListWorkerPools)], opts...)
 	it := &WorkerPoolIterator{}
diff --git a/cloudbuild/apiv1/v2/doc.go b/cloudbuild/apiv1/v2/doc.go
index 4b0f880..8cbd0ad 100644
--- a/cloudbuild/apiv1/v2/doc.go
+++ b/cloudbuild/apiv1/v2/doc.go
@@ -89,7 +89,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/cloudbuild/apiv1/v2/version.go b/cloudbuild/apiv1/v2/version.go
new file mode 100644
index 0000000..0ded0b0
--- /dev/null
+++ b/cloudbuild/apiv1/v2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package cloudbuild
+
+import "cloud.google.com/go/cloudbuild/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/clouddms/apiv1/data_migration_client.go b/clouddms/apiv1/data_migration_client.go
index 542be45..cbdffbc 100644
--- a/clouddms/apiv1/data_migration_client.go
+++ b/clouddms/apiv1/data_migration_client.go
@@ -420,7 +420,7 @@
 // use by Google-written clients.
 func (c *dataMigrationGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -432,6 +432,7 @@
 
 func (c *dataMigrationGRPCClient) ListMigrationJobs(ctx context.Context, req *clouddmspb.ListMigrationJobsRequest, opts ...gax.CallOption) *MigrationJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMigrationJobs[0:len((*c.CallOptions).ListMigrationJobs):len((*c.CallOptions).ListMigrationJobs)], opts...)
 	it := &MigrationJobIterator{}
@@ -481,6 +482,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMigrationJob[0:len((*c.CallOptions).GetMigrationJob):len((*c.CallOptions).GetMigrationJob)], opts...)
 	var resp *clouddmspb.MigrationJob
@@ -502,6 +504,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMigrationJob[0:len((*c.CallOptions).CreateMigrationJob):len((*c.CallOptions).CreateMigrationJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -525,6 +528,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "migration_job.name", url.QueryEscape(req.GetMigrationJob().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateMigrationJob[0:len((*c.CallOptions).UpdateMigrationJob):len((*c.CallOptions).UpdateMigrationJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -548,6 +552,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteMigrationJob[0:len((*c.CallOptions).DeleteMigrationJob):len((*c.CallOptions).DeleteMigrationJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -571,6 +576,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartMigrationJob[0:len((*c.CallOptions).StartMigrationJob):len((*c.CallOptions).StartMigrationJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -594,6 +600,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StopMigrationJob[0:len((*c.CallOptions).StopMigrationJob):len((*c.CallOptions).StopMigrationJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -617,6 +624,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResumeMigrationJob[0:len((*c.CallOptions).ResumeMigrationJob):len((*c.CallOptions).ResumeMigrationJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -640,6 +648,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PromoteMigrationJob[0:len((*c.CallOptions).PromoteMigrationJob):len((*c.CallOptions).PromoteMigrationJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -663,6 +672,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).VerifyMigrationJob[0:len((*c.CallOptions).VerifyMigrationJob):len((*c.CallOptions).VerifyMigrationJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -686,6 +696,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RestartMigrationJob[0:len((*c.CallOptions).RestartMigrationJob):len((*c.CallOptions).RestartMigrationJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -709,6 +720,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "migration_job", url.QueryEscape(req.GetMigrationJob())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GenerateSshScript[0:len((*c.CallOptions).GenerateSshScript):len((*c.CallOptions).GenerateSshScript)], opts...)
 	var resp *clouddmspb.SshScript
@@ -725,6 +737,7 @@
 
 func (c *dataMigrationGRPCClient) ListConnectionProfiles(ctx context.Context, req *clouddmspb.ListConnectionProfilesRequest, opts ...gax.CallOption) *ConnectionProfileIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListConnectionProfiles[0:len((*c.CallOptions).ListConnectionProfiles):len((*c.CallOptions).ListConnectionProfiles)], opts...)
 	it := &ConnectionProfileIterator{}
@@ -774,6 +787,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetConnectionProfile[0:len((*c.CallOptions).GetConnectionProfile):len((*c.CallOptions).GetConnectionProfile)], opts...)
 	var resp *clouddmspb.ConnectionProfile
@@ -795,6 +809,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateConnectionProfile[0:len((*c.CallOptions).CreateConnectionProfile):len((*c.CallOptions).CreateConnectionProfile)], opts...)
 	var resp *longrunningpb.Operation
@@ -818,6 +833,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "connection_profile.name", url.QueryEscape(req.GetConnectionProfile().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateConnectionProfile[0:len((*c.CallOptions).UpdateConnectionProfile):len((*c.CallOptions).UpdateConnectionProfile)], opts...)
 	var resp *longrunningpb.Operation
@@ -841,6 +857,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteConnectionProfile[0:len((*c.CallOptions).DeleteConnectionProfile):len((*c.CallOptions).DeleteConnectionProfile)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/clouddms/apiv1/doc.go b/clouddms/apiv1/doc.go
index c28e210..208ca89 100644
--- a/clouddms/apiv1/doc.go
+++ b/clouddms/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/clouddms/apiv1/version.go b/clouddms/apiv1/version.go
new file mode 100644
index 0000000..d0ed911
--- /dev/null
+++ b/clouddms/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package clouddms
+
+import "cloud.google.com/go/clouddms/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/cloudtasks/apiv2/cloud_tasks_client.go b/cloudtasks/apiv2/cloud_tasks_client.go
index bac2044..1f8fa35 100644
--- a/cloudtasks/apiv2/cloud_tasks_client.go
+++ b/cloudtasks/apiv2/cloud_tasks_client.go
@@ -513,7 +513,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -525,6 +525,7 @@
 
 func (c *gRPCClient) ListQueues(ctx context.Context, req *taskspb.ListQueuesRequest, opts ...gax.CallOption) *QueueIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListQueues[0:len((*c.CallOptions).ListQueues):len((*c.CallOptions).ListQueues)], opts...)
 	it := &QueueIterator{}
@@ -574,6 +575,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetQueue[0:len((*c.CallOptions).GetQueue):len((*c.CallOptions).GetQueue)], opts...)
 	var resp *taskspb.Queue
@@ -595,6 +597,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateQueue[0:len((*c.CallOptions).CreateQueue):len((*c.CallOptions).CreateQueue)], opts...)
 	var resp *taskspb.Queue
@@ -616,6 +619,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "queue.name", url.QueryEscape(req.GetQueue().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateQueue[0:len((*c.CallOptions).UpdateQueue):len((*c.CallOptions).UpdateQueue)], opts...)
 	var resp *taskspb.Queue
@@ -637,6 +641,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteQueue[0:len((*c.CallOptions).DeleteQueue):len((*c.CallOptions).DeleteQueue)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -654,6 +659,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PurgeQueue[0:len((*c.CallOptions).PurgeQueue):len((*c.CallOptions).PurgeQueue)], opts...)
 	var resp *taskspb.Queue
@@ -675,6 +681,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PauseQueue[0:len((*c.CallOptions).PauseQueue):len((*c.CallOptions).PauseQueue)], opts...)
 	var resp *taskspb.Queue
@@ -696,6 +703,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResumeQueue[0:len((*c.CallOptions).ResumeQueue):len((*c.CallOptions).ResumeQueue)], opts...)
 	var resp *taskspb.Queue
@@ -717,6 +725,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -738,6 +747,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -759,6 +769,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
@@ -775,6 +786,7 @@
 
 func (c *gRPCClient) ListTasks(ctx context.Context, req *taskspb.ListTasksRequest, opts ...gax.CallOption) *TaskIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTasks[0:len((*c.CallOptions).ListTasks):len((*c.CallOptions).ListTasks)], opts...)
 	it := &TaskIterator{}
@@ -824,6 +836,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTask[0:len((*c.CallOptions).GetTask):len((*c.CallOptions).GetTask)], opts...)
 	var resp *taskspb.Task
@@ -845,6 +858,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTask[0:len((*c.CallOptions).CreateTask):len((*c.CallOptions).CreateTask)], opts...)
 	var resp *taskspb.Task
@@ -866,6 +880,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTask[0:len((*c.CallOptions).DeleteTask):len((*c.CallOptions).DeleteTask)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -883,6 +898,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunTask[0:len((*c.CallOptions).RunTask):len((*c.CallOptions).RunTask)], opts...)
 	var resp *taskspb.Task
diff --git a/cloudtasks/apiv2/doc.go b/cloudtasks/apiv2/doc.go
index 942bd83..ca538c1 100644
--- a/cloudtasks/apiv2/doc.go
+++ b/cloudtasks/apiv2/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/cloudtasks/apiv2/version.go b/cloudtasks/apiv2/version.go
new file mode 100644
index 0000000..f88578d
--- /dev/null
+++ b/cloudtasks/apiv2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package cloudtasks
+
+import "cloud.google.com/go/cloudtasks/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/cloudtasks/apiv2beta2/cloud_tasks_client.go b/cloudtasks/apiv2beta2/cloud_tasks_client.go
index 3b4f7d2..3827fe3 100644
--- a/cloudtasks/apiv2beta2/cloud_tasks_client.go
+++ b/cloudtasks/apiv2beta2/cloud_tasks_client.go
@@ -593,7 +593,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -605,6 +605,7 @@
 
 func (c *gRPCClient) ListQueues(ctx context.Context, req *taskspb.ListQueuesRequest, opts ...gax.CallOption) *QueueIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListQueues[0:len((*c.CallOptions).ListQueues):len((*c.CallOptions).ListQueues)], opts...)
 	it := &QueueIterator{}
@@ -654,6 +655,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetQueue[0:len((*c.CallOptions).GetQueue):len((*c.CallOptions).GetQueue)], opts...)
 	var resp *taskspb.Queue
@@ -675,6 +677,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateQueue[0:len((*c.CallOptions).CreateQueue):len((*c.CallOptions).CreateQueue)], opts...)
 	var resp *taskspb.Queue
@@ -696,6 +699,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "queue.name", url.QueryEscape(req.GetQueue().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateQueue[0:len((*c.CallOptions).UpdateQueue):len((*c.CallOptions).UpdateQueue)], opts...)
 	var resp *taskspb.Queue
@@ -717,6 +721,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteQueue[0:len((*c.CallOptions).DeleteQueue):len((*c.CallOptions).DeleteQueue)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -734,6 +739,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PurgeQueue[0:len((*c.CallOptions).PurgeQueue):len((*c.CallOptions).PurgeQueue)], opts...)
 	var resp *taskspb.Queue
@@ -755,6 +761,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PauseQueue[0:len((*c.CallOptions).PauseQueue):len((*c.CallOptions).PauseQueue)], opts...)
 	var resp *taskspb.Queue
@@ -776,6 +783,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResumeQueue[0:len((*c.CallOptions).ResumeQueue):len((*c.CallOptions).ResumeQueue)], opts...)
 	var resp *taskspb.Queue
@@ -797,6 +805,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -818,6 +827,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -839,6 +849,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
@@ -855,6 +866,7 @@
 
 func (c *gRPCClient) ListTasks(ctx context.Context, req *taskspb.ListTasksRequest, opts ...gax.CallOption) *TaskIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTasks[0:len((*c.CallOptions).ListTasks):len((*c.CallOptions).ListTasks)], opts...)
 	it := &TaskIterator{}
@@ -904,6 +916,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTask[0:len((*c.CallOptions).GetTask):len((*c.CallOptions).GetTask)], opts...)
 	var resp *taskspb.Task
@@ -925,6 +938,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTask[0:len((*c.CallOptions).CreateTask):len((*c.CallOptions).CreateTask)], opts...)
 	var resp *taskspb.Task
@@ -946,6 +960,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTask[0:len((*c.CallOptions).DeleteTask):len((*c.CallOptions).DeleteTask)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -963,6 +978,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LeaseTasks[0:len((*c.CallOptions).LeaseTasks):len((*c.CallOptions).LeaseTasks)], opts...)
 	var resp *taskspb.LeaseTasksResponse
@@ -984,6 +1000,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AcknowledgeTask[0:len((*c.CallOptions).AcknowledgeTask):len((*c.CallOptions).AcknowledgeTask)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1001,6 +1018,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RenewLease[0:len((*c.CallOptions).RenewLease):len((*c.CallOptions).RenewLease)], opts...)
 	var resp *taskspb.Task
@@ -1022,6 +1040,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelLease[0:len((*c.CallOptions).CancelLease):len((*c.CallOptions).CancelLease)], opts...)
 	var resp *taskspb.Task
@@ -1043,6 +1062,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunTask[0:len((*c.CallOptions).RunTask):len((*c.CallOptions).RunTask)], opts...)
 	var resp *taskspb.Task
diff --git a/cloudtasks/apiv2beta2/doc.go b/cloudtasks/apiv2beta2/doc.go
index df98aa6..950d33d 100644
--- a/cloudtasks/apiv2beta2/doc.go
+++ b/cloudtasks/apiv2beta2/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/cloudtasks/apiv2beta2/version.go b/cloudtasks/apiv2beta2/version.go
new file mode 100644
index 0000000..f88578d
--- /dev/null
+++ b/cloudtasks/apiv2beta2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package cloudtasks
+
+import "cloud.google.com/go/cloudtasks/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/cloudtasks/apiv2beta3/cloud_tasks_client.go b/cloudtasks/apiv2beta3/cloud_tasks_client.go
index 657f518..a867f15 100644
--- a/cloudtasks/apiv2beta3/cloud_tasks_client.go
+++ b/cloudtasks/apiv2beta3/cloud_tasks_client.go
@@ -513,7 +513,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -525,6 +525,7 @@
 
 func (c *gRPCClient) ListQueues(ctx context.Context, req *taskspb.ListQueuesRequest, opts ...gax.CallOption) *QueueIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListQueues[0:len((*c.CallOptions).ListQueues):len((*c.CallOptions).ListQueues)], opts...)
 	it := &QueueIterator{}
@@ -574,6 +575,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetQueue[0:len((*c.CallOptions).GetQueue):len((*c.CallOptions).GetQueue)], opts...)
 	var resp *taskspb.Queue
@@ -595,6 +597,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateQueue[0:len((*c.CallOptions).CreateQueue):len((*c.CallOptions).CreateQueue)], opts...)
 	var resp *taskspb.Queue
@@ -616,6 +619,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "queue.name", url.QueryEscape(req.GetQueue().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateQueue[0:len((*c.CallOptions).UpdateQueue):len((*c.CallOptions).UpdateQueue)], opts...)
 	var resp *taskspb.Queue
@@ -637,6 +641,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteQueue[0:len((*c.CallOptions).DeleteQueue):len((*c.CallOptions).DeleteQueue)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -654,6 +659,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PurgeQueue[0:len((*c.CallOptions).PurgeQueue):len((*c.CallOptions).PurgeQueue)], opts...)
 	var resp *taskspb.Queue
@@ -675,6 +681,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PauseQueue[0:len((*c.CallOptions).PauseQueue):len((*c.CallOptions).PauseQueue)], opts...)
 	var resp *taskspb.Queue
@@ -696,6 +703,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResumeQueue[0:len((*c.CallOptions).ResumeQueue):len((*c.CallOptions).ResumeQueue)], opts...)
 	var resp *taskspb.Queue
@@ -717,6 +725,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -738,6 +747,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -759,6 +769,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
@@ -775,6 +786,7 @@
 
 func (c *gRPCClient) ListTasks(ctx context.Context, req *taskspb.ListTasksRequest, opts ...gax.CallOption) *TaskIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTasks[0:len((*c.CallOptions).ListTasks):len((*c.CallOptions).ListTasks)], opts...)
 	it := &TaskIterator{}
@@ -824,6 +836,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTask[0:len((*c.CallOptions).GetTask):len((*c.CallOptions).GetTask)], opts...)
 	var resp *taskspb.Task
@@ -845,6 +858,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTask[0:len((*c.CallOptions).CreateTask):len((*c.CallOptions).CreateTask)], opts...)
 	var resp *taskspb.Task
@@ -866,6 +880,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTask[0:len((*c.CallOptions).DeleteTask):len((*c.CallOptions).DeleteTask)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -883,6 +898,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunTask[0:len((*c.CallOptions).RunTask):len((*c.CallOptions).RunTask)], opts...)
 	var resp *taskspb.Task
diff --git a/cloudtasks/apiv2beta3/doc.go b/cloudtasks/apiv2beta3/doc.go
index 09e0585..888c669 100644
--- a/cloudtasks/apiv2beta3/doc.go
+++ b/cloudtasks/apiv2beta3/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/cloudtasks/apiv2beta3/version.go b/cloudtasks/apiv2beta3/version.go
new file mode 100644
index 0000000..f88578d
--- /dev/null
+++ b/cloudtasks/apiv2beta3/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package cloudtasks
+
+import "cloud.google.com/go/cloudtasks/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/compute/apiv1/accelerator_types_client.go b/compute/apiv1/accelerator_types_client.go
index c3a75ea..be1a5d3 100644
--- a/compute/apiv1/accelerator_types_client.go
+++ b/compute/apiv1/accelerator_types_client.go
@@ -155,7 +155,7 @@
 // use by Google-written clients.
 func (c *acceleratorTypesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/addresses_client.go b/compute/apiv1/addresses_client.go
index 40a042a..bf89a63 100644
--- a/compute/apiv1/addresses_client.go
+++ b/compute/apiv1/addresses_client.go
@@ -179,7 +179,7 @@
 // use by Google-written clients.
 func (c *addressesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/autoscalers_client.go b/compute/apiv1/autoscalers_client.go
index 21b8ca1..f712254 100644
--- a/compute/apiv1/autoscalers_client.go
+++ b/compute/apiv1/autoscalers_client.go
@@ -193,7 +193,7 @@
 // use by Google-written clients.
 func (c *autoscalersRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/backend_buckets_client.go b/compute/apiv1/backend_buckets_client.go
index 80e312b..803feda 100644
--- a/compute/apiv1/backend_buckets_client.go
+++ b/compute/apiv1/backend_buckets_client.go
@@ -206,7 +206,7 @@
 // use by Google-written clients.
 func (c *backendBucketsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/backend_services_client.go b/compute/apiv1/backend_services_client.go
index 1c4ba38..9fe61ff 100644
--- a/compute/apiv1/backend_services_client.go
+++ b/compute/apiv1/backend_services_client.go
@@ -228,7 +228,7 @@
 // use by Google-written clients.
 func (c *backendServicesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/disk_types_client.go b/compute/apiv1/disk_types_client.go
index d580a76..08e8194 100644
--- a/compute/apiv1/disk_types_client.go
+++ b/compute/apiv1/disk_types_client.go
@@ -151,7 +151,7 @@
 // use by Google-written clients.
 func (c *diskTypesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/disks_client.go b/compute/apiv1/disks_client.go
index b240028..63ac3f3 100644
--- a/compute/apiv1/disks_client.go
+++ b/compute/apiv1/disks_client.go
@@ -235,7 +235,7 @@
 // use by Google-written clients.
 func (c *disksRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/doc.go b/compute/apiv1/doc.go
index e641198..75ef1bd 100644
--- a/compute/apiv1/doc.go
+++ b/compute/apiv1/doc.go
@@ -73,6 +73,7 @@
 
 import (
 	"context"
+	"fmt"
 	"net/http"
 	"os"
 	"runtime"
@@ -80,7 +81,6 @@
 	"strings"
 	"unicode"
 
-	"golang.org/x/xerrors"
 	"google.golang.org/api/option"
 	"google.golang.org/grpc/metadata"
 )
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
@@ -163,7 +170,7 @@
 // of receiving an unknown enum value.
 func maybeUnknownEnum(err error) error {
 	if strings.Contains(err.Error(), "invalid value for enum type") {
-		err = xerrors.Errorf("received an unknown enum value; a later version of the library may support it: %w", err)
+		err = fmt.Errorf("received an unknown enum value; a later version of the library may support it: %w", err)
 	}
 	return err
 }
diff --git a/compute/apiv1/external_vpn_gateways_client.go b/compute/apiv1/external_vpn_gateways_client.go
index 1a2f0e5..b44ae35 100644
--- a/compute/apiv1/external_vpn_gateways_client.go
+++ b/compute/apiv1/external_vpn_gateways_client.go
@@ -185,7 +185,7 @@
 // use by Google-written clients.
 func (c *externalVpnGatewaysRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/firewall_policies_client.go b/compute/apiv1/firewall_policies_client.go
index b6218d6..889ab89 100644
--- a/compute/apiv1/firewall_policies_client.go
+++ b/compute/apiv1/firewall_policies_client.go
@@ -269,7 +269,7 @@
 // use by Google-written clients.
 func (c *firewallPoliciesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/firewalls_client.go b/compute/apiv1/firewalls_client.go
index 199a84a..a3f358e 100644
--- a/compute/apiv1/firewalls_client.go
+++ b/compute/apiv1/firewalls_client.go
@@ -185,7 +185,7 @@
 // use by Google-written clients.
 func (c *firewallsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/forwarding_rules_client.go b/compute/apiv1/forwarding_rules_client.go
index 9bc9120..967779e 100644
--- a/compute/apiv1/forwarding_rules_client.go
+++ b/compute/apiv1/forwarding_rules_client.go
@@ -200,7 +200,7 @@
 // use by Google-written clients.
 func (c *forwardingRulesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/global_addresses_client.go b/compute/apiv1/global_addresses_client.go
index afd5f7c..5ce280f 100644
--- a/compute/apiv1/global_addresses_client.go
+++ b/compute/apiv1/global_addresses_client.go
@@ -171,7 +171,7 @@
 // use by Google-written clients.
 func (c *globalAddressesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/global_forwarding_rules_client.go b/compute/apiv1/global_forwarding_rules_client.go
index 8a42bcb..00dd518 100644
--- a/compute/apiv1/global_forwarding_rules_client.go
+++ b/compute/apiv1/global_forwarding_rules_client.go
@@ -192,7 +192,7 @@
 // use by Google-written clients.
 func (c *globalForwardingRulesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/global_network_endpoint_groups_client.go b/compute/apiv1/global_network_endpoint_groups_client.go
index 12ad8e0..b6e0892 100644
--- a/compute/apiv1/global_network_endpoint_groups_client.go
+++ b/compute/apiv1/global_network_endpoint_groups_client.go
@@ -192,7 +192,7 @@
 // use by Google-written clients.
 func (c *globalNetworkEndpointGroupsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/global_operations_client.go b/compute/apiv1/global_operations_client.go
index 13521a6..0d22745 100644
--- a/compute/apiv1/global_operations_client.go
+++ b/compute/apiv1/global_operations_client.go
@@ -165,7 +165,7 @@
 // use by Google-written clients.
 func (c *globalOperationsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/global_organization_operations_client.go b/compute/apiv1/global_organization_operations_client.go
index b3870d7..fb9caf8 100644
--- a/compute/apiv1/global_organization_operations_client.go
+++ b/compute/apiv1/global_organization_operations_client.go
@@ -150,7 +150,7 @@
 // use by Google-written clients.
 func (c *globalOrganizationOperationsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/global_public_delegated_prefixes_client.go b/compute/apiv1/global_public_delegated_prefixes_client.go
index b7f469c..d1886ca 100644
--- a/compute/apiv1/global_public_delegated_prefixes_client.go
+++ b/compute/apiv1/global_public_delegated_prefixes_client.go
@@ -178,7 +178,7 @@
 // use by Google-written clients.
 func (c *globalPublicDelegatedPrefixesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/health_checks_client.go b/compute/apiv1/health_checks_client.go
index fc508d1..2801133 100644
--- a/compute/apiv1/health_checks_client.go
+++ b/compute/apiv1/health_checks_client.go
@@ -193,7 +193,7 @@
 // use by Google-written clients.
 func (c *healthChecksRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/image_family_views_client.go b/compute/apiv1/image_family_views_client.go
index 52f7765..4afa495 100644
--- a/compute/apiv1/image_family_views_client.go
+++ b/compute/apiv1/image_family_views_client.go
@@ -133,7 +133,7 @@
 // use by Google-written clients.
 func (c *imageFamilyViewsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/images_client.go b/compute/apiv1/images_client.go
index 669beec..d58fffd 100644
--- a/compute/apiv1/images_client.go
+++ b/compute/apiv1/images_client.go
@@ -220,7 +220,7 @@
 // use by Google-written clients.
 func (c *imagesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/instance_group_managers_client.go b/compute/apiv1/instance_group_managers_client.go
index 933e9e0..caa4c11 100644
--- a/compute/apiv1/instance_group_managers_client.go
+++ b/compute/apiv1/instance_group_managers_client.go
@@ -284,7 +284,7 @@
 // use by Google-written clients.
 func (c *instanceGroupManagersRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/instance_groups_client.go b/compute/apiv1/instance_groups_client.go
index 44148f3..b8d797c 100644
--- a/compute/apiv1/instance_groups_client.go
+++ b/compute/apiv1/instance_groups_client.go
@@ -207,7 +207,7 @@
 // use by Google-written clients.
 func (c *instanceGroupsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/instance_templates_client.go b/compute/apiv1/instance_templates_client.go
index 7347e96..06b17da 100644
--- a/compute/apiv1/instance_templates_client.go
+++ b/compute/apiv1/instance_templates_client.go
@@ -192,7 +192,7 @@
 // use by Google-written clients.
 func (c *instanceTemplatesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/instances_client.go b/compute/apiv1/instances_client.go
index e640fd2..84597bb 100644
--- a/compute/apiv1/instances_client.go
+++ b/compute/apiv1/instances_client.go
@@ -459,7 +459,7 @@
 // use by Google-written clients.
 func (c *instancesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/interconnect_attachments_client.go b/compute/apiv1/interconnect_attachments_client.go
index 2be90c8..5fb1852 100644
--- a/compute/apiv1/interconnect_attachments_client.go
+++ b/compute/apiv1/interconnect_attachments_client.go
@@ -186,7 +186,7 @@
 // use by Google-written clients.
 func (c *interconnectAttachmentsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/interconnect_locations_client.go b/compute/apiv1/interconnect_locations_client.go
index dc5b783..c2ed8a2 100644
--- a/compute/apiv1/interconnect_locations_client.go
+++ b/compute/apiv1/interconnect_locations_client.go
@@ -143,7 +143,7 @@
 // use by Google-written clients.
 func (c *interconnectLocationsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/interconnects_client.go b/compute/apiv1/interconnects_client.go
index e471e8f..8a3bc48 100644
--- a/compute/apiv1/interconnects_client.go
+++ b/compute/apiv1/interconnects_client.go
@@ -185,7 +185,7 @@
 // use by Google-written clients.
 func (c *interconnectsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/license_codes_client.go b/compute/apiv1/license_codes_client.go
index 434dd62..75fb5ec 100644
--- a/compute/apiv1/license_codes_client.go
+++ b/compute/apiv1/license_codes_client.go
@@ -141,7 +141,7 @@
 // use by Google-written clients.
 func (c *licenseCodesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/licenses_client.go b/compute/apiv1/licenses_client.go
index 8769bc5..98667d8 100644
--- a/compute/apiv1/licenses_client.go
+++ b/compute/apiv1/licenses_client.go
@@ -192,7 +192,7 @@
 // use by Google-written clients.
 func (c *licensesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/machine_images_client.go b/compute/apiv1/machine_images_client.go
index 82412cc..2ebc3ce 100644
--- a/compute/apiv1/machine_images_client.go
+++ b/compute/apiv1/machine_images_client.go
@@ -192,7 +192,7 @@
 // use by Google-written clients.
 func (c *machineImagesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/machine_types_client.go b/compute/apiv1/machine_types_client.go
index 55b7242..11b5e33 100644
--- a/compute/apiv1/machine_types_client.go
+++ b/compute/apiv1/machine_types_client.go
@@ -151,7 +151,7 @@
 // use by Google-written clients.
 func (c *machineTypesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/network_endpoint_groups_client.go b/compute/apiv1/network_endpoint_groups_client.go
index f20b037..12d0194 100644
--- a/compute/apiv1/network_endpoint_groups_client.go
+++ b/compute/apiv1/network_endpoint_groups_client.go
@@ -207,7 +207,7 @@
 // use by Google-written clients.
 func (c *networkEndpointGroupsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/networks_client.go b/compute/apiv1/networks_client.go
index cbfcce4..108e54a 100644
--- a/compute/apiv1/networks_client.go
+++ b/compute/apiv1/networks_client.go
@@ -220,7 +220,7 @@
 // use by Google-written clients.
 func (c *networksRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/node_groups_client.go b/compute/apiv1/node_groups_client.go
index 665ed5d..1d48efd 100644
--- a/compute/apiv1/node_groups_client.go
+++ b/compute/apiv1/node_groups_client.go
@@ -235,7 +235,7 @@
 // use by Google-written clients.
 func (c *nodeGroupsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/node_templates_client.go b/compute/apiv1/node_templates_client.go
index 6b870e5..e6c533a 100644
--- a/compute/apiv1/node_templates_client.go
+++ b/compute/apiv1/node_templates_client.go
@@ -200,7 +200,7 @@
 // use by Google-written clients.
 func (c *nodeTemplatesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/node_types_client.go b/compute/apiv1/node_types_client.go
index a03886a..18aebb2 100644
--- a/compute/apiv1/node_types_client.go
+++ b/compute/apiv1/node_types_client.go
@@ -151,7 +151,7 @@
 // use by Google-written clients.
 func (c *nodeTypesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/packet_mirrorings_client.go b/compute/apiv1/packet_mirrorings_client.go
index 9c84353..3da2a0f 100644
--- a/compute/apiv1/packet_mirrorings_client.go
+++ b/compute/apiv1/packet_mirrorings_client.go
@@ -193,7 +193,7 @@
 // use by Google-written clients.
 func (c *packetMirroringsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/projects_client.go b/compute/apiv1/projects_client.go
index 168755a..4bc69d6 100644
--- a/compute/apiv1/projects_client.go
+++ b/compute/apiv1/projects_client.go
@@ -234,7 +234,7 @@
 // use by Google-written clients.
 func (c *projectsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/public_advertised_prefixes_client.go b/compute/apiv1/public_advertised_prefixes_client.go
index 7e7b80c..7fa4b1c 100644
--- a/compute/apiv1/public_advertised_prefixes_client.go
+++ b/compute/apiv1/public_advertised_prefixes_client.go
@@ -178,7 +178,7 @@
 // use by Google-written clients.
 func (c *publicAdvertisedPrefixesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/public_delegated_prefixes_client.go b/compute/apiv1/public_delegated_prefixes_client.go
index 2fbf194..160afbc 100644
--- a/compute/apiv1/public_delegated_prefixes_client.go
+++ b/compute/apiv1/public_delegated_prefixes_client.go
@@ -186,7 +186,7 @@
 // use by Google-written clients.
 func (c *publicDelegatedPrefixesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_autoscalers_client.go b/compute/apiv1/region_autoscalers_client.go
index 2075dc2..d5cfa97 100644
--- a/compute/apiv1/region_autoscalers_client.go
+++ b/compute/apiv1/region_autoscalers_client.go
@@ -185,7 +185,7 @@
 // use by Google-written clients.
 func (c *regionAutoscalersRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_backend_services_client.go b/compute/apiv1/region_backend_services_client.go
index 9ee2467..469cdbb 100644
--- a/compute/apiv1/region_backend_services_client.go
+++ b/compute/apiv1/region_backend_services_client.go
@@ -192,7 +192,7 @@
 // use by Google-written clients.
 func (c *regionBackendServicesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_commitments_client.go b/compute/apiv1/region_commitments_client.go
index 77d5262..0877c85 100644
--- a/compute/apiv1/region_commitments_client.go
+++ b/compute/apiv1/region_commitments_client.go
@@ -179,7 +179,7 @@
 // use by Google-written clients.
 func (c *regionCommitmentsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_disk_types_client.go b/compute/apiv1/region_disk_types_client.go
index fea3b11..78ad10d 100644
--- a/compute/apiv1/region_disk_types_client.go
+++ b/compute/apiv1/region_disk_types_client.go
@@ -143,7 +143,7 @@
 // use by Google-written clients.
 func (c *regionDiskTypesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_disks_client.go b/compute/apiv1/region_disks_client.go
index 2a750fd..55466ba 100644
--- a/compute/apiv1/region_disks_client.go
+++ b/compute/apiv1/region_disks_client.go
@@ -227,7 +227,7 @@
 // use by Google-written clients.
 func (c *regionDisksRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_health_check_services_client.go b/compute/apiv1/region_health_check_services_client.go
index 4027d0b..005bb26 100644
--- a/compute/apiv1/region_health_check_services_client.go
+++ b/compute/apiv1/region_health_check_services_client.go
@@ -178,7 +178,7 @@
 // use by Google-written clients.
 func (c *regionHealthCheckServicesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_health_checks_client.go b/compute/apiv1/region_health_checks_client.go
index 091d232..cd21c50 100644
--- a/compute/apiv1/region_health_checks_client.go
+++ b/compute/apiv1/region_health_checks_client.go
@@ -185,7 +185,7 @@
 // use by Google-written clients.
 func (c *regionHealthChecksRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_instance_group_managers_client.go b/compute/apiv1/region_instance_group_managers_client.go
index 9a55a64..ba5b1ee 100644
--- a/compute/apiv1/region_instance_group_managers_client.go
+++ b/compute/apiv1/region_instance_group_managers_client.go
@@ -276,7 +276,7 @@
 // use by Google-written clients.
 func (c *regionInstanceGroupManagersRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_instance_groups_client.go b/compute/apiv1/region_instance_groups_client.go
index f74f9f6..e646958 100644
--- a/compute/apiv1/region_instance_groups_client.go
+++ b/compute/apiv1/region_instance_groups_client.go
@@ -171,7 +171,7 @@
 // use by Google-written clients.
 func (c *regionInstanceGroupsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_instances_client.go b/compute/apiv1/region_instances_client.go
index a2dc639..8891d80 100644
--- a/compute/apiv1/region_instances_client.go
+++ b/compute/apiv1/region_instances_client.go
@@ -147,7 +147,7 @@
 // use by Google-written clients.
 func (c *regionInstancesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_network_endpoint_groups_client.go b/compute/apiv1/region_network_endpoint_groups_client.go
index 663361b..3869e83 100644
--- a/compute/apiv1/region_network_endpoint_groups_client.go
+++ b/compute/apiv1/region_network_endpoint_groups_client.go
@@ -171,7 +171,7 @@
 // use by Google-written clients.
 func (c *regionNetworkEndpointGroupsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_notification_endpoints_client.go b/compute/apiv1/region_notification_endpoints_client.go
index 54ba6bd..7254fb4 100644
--- a/compute/apiv1/region_notification_endpoints_client.go
+++ b/compute/apiv1/region_notification_endpoints_client.go
@@ -171,7 +171,7 @@
 // use by Google-written clients.
 func (c *regionNotificationEndpointsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_operations_client.go b/compute/apiv1/region_operations_client.go
index 0235fa1..665fbb3 100644
--- a/compute/apiv1/region_operations_client.go
+++ b/compute/apiv1/region_operations_client.go
@@ -157,7 +157,7 @@
 // use by Google-written clients.
 func (c *regionOperationsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_ssl_certificates_client.go b/compute/apiv1/region_ssl_certificates_client.go
index 843be47..43cad36 100644
--- a/compute/apiv1/region_ssl_certificates_client.go
+++ b/compute/apiv1/region_ssl_certificates_client.go
@@ -171,7 +171,7 @@
 // use by Google-written clients.
 func (c *regionSslCertificatesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_target_http_proxies_client.go b/compute/apiv1/region_target_http_proxies_client.go
index 8737251..fd3b182 100644
--- a/compute/apiv1/region_target_http_proxies_client.go
+++ b/compute/apiv1/region_target_http_proxies_client.go
@@ -178,7 +178,7 @@
 // use by Google-written clients.
 func (c *regionTargetHttpProxiesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_target_https_proxies_client.go b/compute/apiv1/region_target_https_proxies_client.go
index 70a4d05..357226c 100644
--- a/compute/apiv1/region_target_https_proxies_client.go
+++ b/compute/apiv1/region_target_https_proxies_client.go
@@ -185,7 +185,7 @@
 // use by Google-written clients.
 func (c *regionTargetHttpsProxiesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/region_url_maps_client.go b/compute/apiv1/region_url_maps_client.go
index 5b81a94..78ce133 100644
--- a/compute/apiv1/region_url_maps_client.go
+++ b/compute/apiv1/region_url_maps_client.go
@@ -192,7 +192,7 @@
 // use by Google-written clients.
 func (c *regionUrlMapsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/regions_client.go b/compute/apiv1/regions_client.go
index 43be455..62a62c1 100644
--- a/compute/apiv1/regions_client.go
+++ b/compute/apiv1/regions_client.go
@@ -143,7 +143,7 @@
 // use by Google-written clients.
 func (c *regionsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/reservations_client.go b/compute/apiv1/reservations_client.go
index 2da5379..7e25b40 100644
--- a/compute/apiv1/reservations_client.go
+++ b/compute/apiv1/reservations_client.go
@@ -214,7 +214,7 @@
 // use by Google-written clients.
 func (c *reservationsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/resource_policies_client.go b/compute/apiv1/resource_policies_client.go
index de52267..868306b 100644
--- a/compute/apiv1/resource_policies_client.go
+++ b/compute/apiv1/resource_policies_client.go
@@ -200,7 +200,7 @@
 // use by Google-written clients.
 func (c *resourcePoliciesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/routers_client.go b/compute/apiv1/routers_client.go
index ae93ab2..ff1f4a9 100644
--- a/compute/apiv1/routers_client.go
+++ b/compute/apiv1/routers_client.go
@@ -214,7 +214,7 @@
 // use by Google-written clients.
 func (c *routersRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/routes_client.go b/compute/apiv1/routes_client.go
index 4155a38..3e2e8f6 100644
--- a/compute/apiv1/routes_client.go
+++ b/compute/apiv1/routes_client.go
@@ -171,7 +171,7 @@
 // use by Google-written clients.
 func (c *routesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/security_policies_client.go b/compute/apiv1/security_policies_client.go
index 0b8a11d..f254f1b 100644
--- a/compute/apiv1/security_policies_client.go
+++ b/compute/apiv1/security_policies_client.go
@@ -213,7 +213,7 @@
 // use by Google-written clients.
 func (c *securityPoliciesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/service_attachments_client.go b/compute/apiv1/service_attachments_client.go
index 4de77dd..41d210b 100644
--- a/compute/apiv1/service_attachments_client.go
+++ b/compute/apiv1/service_attachments_client.go
@@ -207,7 +207,7 @@
 // use by Google-written clients.
 func (c *serviceAttachmentsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/snapshots_client.go b/compute/apiv1/snapshots_client.go
index bc04ca9..7662659 100644
--- a/compute/apiv1/snapshots_client.go
+++ b/compute/apiv1/snapshots_client.go
@@ -199,7 +199,7 @@
 // use by Google-written clients.
 func (c *snapshotsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/ssl_certificates_client.go b/compute/apiv1/ssl_certificates_client.go
index 6ba4485..f7d631a 100644
--- a/compute/apiv1/ssl_certificates_client.go
+++ b/compute/apiv1/ssl_certificates_client.go
@@ -179,7 +179,7 @@
 // use by Google-written clients.
 func (c *sslCertificatesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/ssl_policies_client.go b/compute/apiv1/ssl_policies_client.go
index b67de3f..c38b28e 100644
--- a/compute/apiv1/ssl_policies_client.go
+++ b/compute/apiv1/ssl_policies_client.go
@@ -185,7 +185,7 @@
 // use by Google-written clients.
 func (c *sslPoliciesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/subnetworks_client.go b/compute/apiv1/subnetworks_client.go
index 79945e0..25e18f7 100644
--- a/compute/apiv1/subnetworks_client.go
+++ b/compute/apiv1/subnetworks_client.go
@@ -228,7 +228,7 @@
 // use by Google-written clients.
 func (c *subnetworksRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/target_grpc_proxies_client.go b/compute/apiv1/target_grpc_proxies_client.go
index 018cb6a..bde0ffa 100644
--- a/compute/apiv1/target_grpc_proxies_client.go
+++ b/compute/apiv1/target_grpc_proxies_client.go
@@ -178,7 +178,7 @@
 // use by Google-written clients.
 func (c *targetGrpcProxiesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/target_http_proxies_client.go b/compute/apiv1/target_http_proxies_client.go
index 8061c5e..f464fce 100644
--- a/compute/apiv1/target_http_proxies_client.go
+++ b/compute/apiv1/target_http_proxies_client.go
@@ -193,7 +193,7 @@
 // use by Google-written clients.
 func (c *targetHttpProxiesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/target_https_proxies_client.go b/compute/apiv1/target_https_proxies_client.go
index 01e0488..8476314 100644
--- a/compute/apiv1/target_https_proxies_client.go
+++ b/compute/apiv1/target_https_proxies_client.go
@@ -214,7 +214,7 @@
 // use by Google-written clients.
 func (c *targetHttpsProxiesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/target_instances_client.go b/compute/apiv1/target_instances_client.go
index ab61f3e..d6550e6 100644
--- a/compute/apiv1/target_instances_client.go
+++ b/compute/apiv1/target_instances_client.go
@@ -179,7 +179,7 @@
 // use by Google-written clients.
 func (c *targetInstancesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/target_pools_client.go b/compute/apiv1/target_pools_client.go
index d38b334..0751d7b 100644
--- a/compute/apiv1/target_pools_client.go
+++ b/compute/apiv1/target_pools_client.go
@@ -221,7 +221,7 @@
 // use by Google-written clients.
 func (c *targetPoolsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/target_ssl_proxies_client.go b/compute/apiv1/target_ssl_proxies_client.go
index f98f212..8cf983b 100644
--- a/compute/apiv1/target_ssl_proxies_client.go
+++ b/compute/apiv1/target_ssl_proxies_client.go
@@ -199,7 +199,7 @@
 // use by Google-written clients.
 func (c *targetSslProxiesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/target_tcp_proxies_client.go b/compute/apiv1/target_tcp_proxies_client.go
index 9e1c62b..1afef81 100644
--- a/compute/apiv1/target_tcp_proxies_client.go
+++ b/compute/apiv1/target_tcp_proxies_client.go
@@ -185,7 +185,7 @@
 // use by Google-written clients.
 func (c *targetTcpProxiesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/target_vpn_gateways_client.go b/compute/apiv1/target_vpn_gateways_client.go
index fa96afa..b531ad2 100644
--- a/compute/apiv1/target_vpn_gateways_client.go
+++ b/compute/apiv1/target_vpn_gateways_client.go
@@ -179,7 +179,7 @@
 // use by Google-written clients.
 func (c *targetVpnGatewaysRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/url_maps_client.go b/compute/apiv1/url_maps_client.go
index c21487d..2c6316c 100644
--- a/compute/apiv1/url_maps_client.go
+++ b/compute/apiv1/url_maps_client.go
@@ -207,7 +207,7 @@
 // use by Google-written clients.
 func (c *urlMapsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/version.go b/compute/apiv1/version.go
new file mode 100644
index 0000000..fdc8b2f
--- /dev/null
+++ b/compute/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package compute
+
+import "cloud.google.com/go/compute/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/compute/apiv1/vpn_gateways_client.go b/compute/apiv1/vpn_gateways_client.go
index ffe9ecc..3f1ca76 100644
--- a/compute/apiv1/vpn_gateways_client.go
+++ b/compute/apiv1/vpn_gateways_client.go
@@ -200,7 +200,7 @@
 // use by Google-written clients.
 func (c *vpnGatewaysRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/vpn_tunnels_client.go b/compute/apiv1/vpn_tunnels_client.go
index 95f2f9e..217e307 100644
--- a/compute/apiv1/vpn_tunnels_client.go
+++ b/compute/apiv1/vpn_tunnels_client.go
@@ -179,7 +179,7 @@
 // use by Google-written clients.
 func (c *vpnTunnelsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/zone_operations_client.go b/compute/apiv1/zone_operations_client.go
index b679578..fa78ac3 100644
--- a/compute/apiv1/zone_operations_client.go
+++ b/compute/apiv1/zone_operations_client.go
@@ -157,7 +157,7 @@
 // use by Google-written clients.
 func (c *zoneOperationsRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/compute/apiv1/zones_client.go b/compute/apiv1/zones_client.go
index dc52851..5949dc0 100644
--- a/compute/apiv1/zones_client.go
+++ b/compute/apiv1/zones_client.go
@@ -143,7 +143,7 @@
 // use by Google-written clients.
 func (c *zonesRESTClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "rest", "UNKNOWN")
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/contactcenterinsights/apiv1/contact_center_insights_client.go b/contactcenterinsights/apiv1/contact_center_insights_client.go
index c49b6d7..b412f00 100644
--- a/contactcenterinsights/apiv1/contact_center_insights_client.go
+++ b/contactcenterinsights/apiv1/contact_center_insights_client.go
@@ -850,7 +850,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -867,6 +867,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateConversation[0:len((*c.CallOptions).CreateConversation):len((*c.CallOptions).CreateConversation)], opts...)
 	var resp *contactcenterinsightspb.Conversation
@@ -888,6 +889,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "conversation.name", url.QueryEscape(req.GetConversation().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateConversation[0:len((*c.CallOptions).UpdateConversation):len((*c.CallOptions).UpdateConversation)], opts...)
 	var resp *contactcenterinsightspb.Conversation
@@ -909,6 +911,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetConversation[0:len((*c.CallOptions).GetConversation):len((*c.CallOptions).GetConversation)], opts...)
 	var resp *contactcenterinsightspb.Conversation
@@ -925,6 +928,7 @@
 
 func (c *gRPCClient) ListConversations(ctx context.Context, req *contactcenterinsightspb.ListConversationsRequest, opts ...gax.CallOption) *ConversationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListConversations[0:len((*c.CallOptions).ListConversations):len((*c.CallOptions).ListConversations)], opts...)
 	it := &ConversationIterator{}
@@ -974,6 +978,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteConversation[0:len((*c.CallOptions).DeleteConversation):len((*c.CallOptions).DeleteConversation)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -991,6 +996,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAnalysis[0:len((*c.CallOptions).CreateAnalysis):len((*c.CallOptions).CreateAnalysis)], opts...)
 	var resp *longrunningpb.Operation
@@ -1014,6 +1020,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAnalysis[0:len((*c.CallOptions).GetAnalysis):len((*c.CallOptions).GetAnalysis)], opts...)
 	var resp *contactcenterinsightspb.Analysis
@@ -1030,6 +1037,7 @@
 
 func (c *gRPCClient) ListAnalyses(ctx context.Context, req *contactcenterinsightspb.ListAnalysesRequest, opts ...gax.CallOption) *AnalysisIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAnalyses[0:len((*c.CallOptions).ListAnalyses):len((*c.CallOptions).ListAnalyses)], opts...)
 	it := &AnalysisIterator{}
@@ -1079,6 +1087,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAnalysis[0:len((*c.CallOptions).DeleteAnalysis):len((*c.CallOptions).DeleteAnalysis)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1096,6 +1105,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportInsightsData[0:len((*c.CallOptions).ExportInsightsData):len((*c.CallOptions).ExportInsightsData)], opts...)
 	var resp *longrunningpb.Operation
@@ -1119,6 +1129,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateIssueModel[0:len((*c.CallOptions).CreateIssueModel):len((*c.CallOptions).CreateIssueModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -1142,6 +1153,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "issue_model.name", url.QueryEscape(req.GetIssueModel().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateIssueModel[0:len((*c.CallOptions).UpdateIssueModel):len((*c.CallOptions).UpdateIssueModel)], opts...)
 	var resp *contactcenterinsightspb.IssueModel
@@ -1163,6 +1175,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIssueModel[0:len((*c.CallOptions).GetIssueModel):len((*c.CallOptions).GetIssueModel)], opts...)
 	var resp *contactcenterinsightspb.IssueModel
@@ -1184,6 +1197,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListIssueModels[0:len((*c.CallOptions).ListIssueModels):len((*c.CallOptions).ListIssueModels)], opts...)
 	var resp *contactcenterinsightspb.ListIssueModelsResponse
@@ -1205,6 +1219,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteIssueModel[0:len((*c.CallOptions).DeleteIssueModel):len((*c.CallOptions).DeleteIssueModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -1228,6 +1243,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeployIssueModel[0:len((*c.CallOptions).DeployIssueModel):len((*c.CallOptions).DeployIssueModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -1251,6 +1267,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UndeployIssueModel[0:len((*c.CallOptions).UndeployIssueModel):len((*c.CallOptions).UndeployIssueModel)], opts...)
 	var resp *longrunningpb.Operation
@@ -1274,6 +1291,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIssue[0:len((*c.CallOptions).GetIssue):len((*c.CallOptions).GetIssue)], opts...)
 	var resp *contactcenterinsightspb.Issue
@@ -1295,6 +1313,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListIssues[0:len((*c.CallOptions).ListIssues):len((*c.CallOptions).ListIssues)], opts...)
 	var resp *contactcenterinsightspb.ListIssuesResponse
@@ -1316,6 +1335,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "issue.name", url.QueryEscape(req.GetIssue().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateIssue[0:len((*c.CallOptions).UpdateIssue):len((*c.CallOptions).UpdateIssue)], opts...)
 	var resp *contactcenterinsightspb.Issue
@@ -1337,6 +1357,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "issue_model", url.QueryEscape(req.GetIssueModel())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CalculateIssueModelStats[0:len((*c.CallOptions).CalculateIssueModelStats):len((*c.CallOptions).CalculateIssueModelStats)], opts...)
 	var resp *contactcenterinsightspb.CalculateIssueModelStatsResponse
@@ -1358,6 +1379,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreatePhraseMatcher[0:len((*c.CallOptions).CreatePhraseMatcher):len((*c.CallOptions).CreatePhraseMatcher)], opts...)
 	var resp *contactcenterinsightspb.PhraseMatcher
@@ -1379,6 +1401,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPhraseMatcher[0:len((*c.CallOptions).GetPhraseMatcher):len((*c.CallOptions).GetPhraseMatcher)], opts...)
 	var resp *contactcenterinsightspb.PhraseMatcher
@@ -1395,6 +1418,7 @@
 
 func (c *gRPCClient) ListPhraseMatchers(ctx context.Context, req *contactcenterinsightspb.ListPhraseMatchersRequest, opts ...gax.CallOption) *PhraseMatcherIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPhraseMatchers[0:len((*c.CallOptions).ListPhraseMatchers):len((*c.CallOptions).ListPhraseMatchers)], opts...)
 	it := &PhraseMatcherIterator{}
@@ -1444,6 +1468,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePhraseMatcher[0:len((*c.CallOptions).DeletePhraseMatcher):len((*c.CallOptions).DeletePhraseMatcher)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1461,6 +1486,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "phrase_matcher.name", url.QueryEscape(req.GetPhraseMatcher().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdatePhraseMatcher[0:len((*c.CallOptions).UpdatePhraseMatcher):len((*c.CallOptions).UpdatePhraseMatcher)], opts...)
 	var resp *contactcenterinsightspb.PhraseMatcher
@@ -1482,6 +1508,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CalculateStats[0:len((*c.CallOptions).CalculateStats):len((*c.CallOptions).CalculateStats)], opts...)
 	var resp *contactcenterinsightspb.CalculateStatsResponse
@@ -1503,6 +1530,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSettings[0:len((*c.CallOptions).GetSettings):len((*c.CallOptions).GetSettings)], opts...)
 	var resp *contactcenterinsightspb.Settings
@@ -1524,6 +1552,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "settings.name", url.QueryEscape(req.GetSettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSettings[0:len((*c.CallOptions).UpdateSettings):len((*c.CallOptions).UpdateSettings)], opts...)
 	var resp *contactcenterinsightspb.Settings
@@ -1545,6 +1574,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateView[0:len((*c.CallOptions).CreateView):len((*c.CallOptions).CreateView)], opts...)
 	var resp *contactcenterinsightspb.View
@@ -1566,6 +1596,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetView[0:len((*c.CallOptions).GetView):len((*c.CallOptions).GetView)], opts...)
 	var resp *contactcenterinsightspb.View
@@ -1582,6 +1613,7 @@
 
 func (c *gRPCClient) ListViews(ctx context.Context, req *contactcenterinsightspb.ListViewsRequest, opts ...gax.CallOption) *ViewIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListViews[0:len((*c.CallOptions).ListViews):len((*c.CallOptions).ListViews)], opts...)
 	it := &ViewIterator{}
@@ -1631,6 +1663,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "view.name", url.QueryEscape(req.GetView().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateView[0:len((*c.CallOptions).UpdateView):len((*c.CallOptions).UpdateView)], opts...)
 	var resp *contactcenterinsightspb.View
@@ -1652,6 +1685,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteView[0:len((*c.CallOptions).DeleteView):len((*c.CallOptions).DeleteView)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/contactcenterinsights/apiv1/doc.go b/contactcenterinsights/apiv1/doc.go
index 8f3be12..1acec88 100644
--- a/contactcenterinsights/apiv1/doc.go
+++ b/contactcenterinsights/apiv1/doc.go
@@ -82,7 +82,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/contactcenterinsights/apiv1/version.go b/contactcenterinsights/apiv1/version.go
new file mode 100644
index 0000000..1a228e8
--- /dev/null
+++ b/contactcenterinsights/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package contactcenterinsights
+
+import "cloud.google.com/go/contactcenterinsights/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/container/apiv1/cluster_manager_client.go b/container/apiv1/cluster_manager_client.go
index 1313251..0fcb01d 100644
--- a/container/apiv1/cluster_manager_client.go
+++ b/container/apiv1/cluster_manager_client.go
@@ -559,7 +559,7 @@
 // use by Google-written clients.
 func (c *clusterManagerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -576,6 +576,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "parent", url.QueryEscape(req.GetParent()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListClusters[0:len((*c.CallOptions).ListClusters):len((*c.CallOptions).ListClusters)], opts...)
 	var resp *containerpb.ListClustersResponse
@@ -597,6 +598,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCluster[0:len((*c.CallOptions).GetCluster):len((*c.CallOptions).GetCluster)], opts...)
 	var resp *containerpb.Cluster
@@ -618,6 +620,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "parent", url.QueryEscape(req.GetParent()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCluster[0:len((*c.CallOptions).CreateCluster):len((*c.CallOptions).CreateCluster)], opts...)
 	var resp *containerpb.Operation
@@ -639,6 +642,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCluster[0:len((*c.CallOptions).UpdateCluster):len((*c.CallOptions).UpdateCluster)], opts...)
 	var resp *containerpb.Operation
@@ -660,6 +664,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId()), "node_pool_id", url.QueryEscape(req.GetNodePoolId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateNodePool[0:len((*c.CallOptions).UpdateNodePool):len((*c.CallOptions).UpdateNodePool)], opts...)
 	var resp *containerpb.Operation
@@ -681,6 +686,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId()), "node_pool_id", url.QueryEscape(req.GetNodePoolId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetNodePoolAutoscaling[0:len((*c.CallOptions).SetNodePoolAutoscaling):len((*c.CallOptions).SetNodePoolAutoscaling)], opts...)
 	var resp *containerpb.Operation
@@ -702,6 +708,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetLoggingService[0:len((*c.CallOptions).SetLoggingService):len((*c.CallOptions).SetLoggingService)], opts...)
 	var resp *containerpb.Operation
@@ -723,6 +730,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetMonitoringService[0:len((*c.CallOptions).SetMonitoringService):len((*c.CallOptions).SetMonitoringService)], opts...)
 	var resp *containerpb.Operation
@@ -744,6 +752,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetAddonsConfig[0:len((*c.CallOptions).SetAddonsConfig):len((*c.CallOptions).SetAddonsConfig)], opts...)
 	var resp *containerpb.Operation
@@ -765,6 +774,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetLocations[0:len((*c.CallOptions).SetLocations):len((*c.CallOptions).SetLocations)], opts...)
 	var resp *containerpb.Operation
@@ -786,6 +796,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateMaster[0:len((*c.CallOptions).UpdateMaster):len((*c.CallOptions).UpdateMaster)], opts...)
 	var resp *containerpb.Operation
@@ -807,6 +818,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetMasterAuth[0:len((*c.CallOptions).SetMasterAuth):len((*c.CallOptions).SetMasterAuth)], opts...)
 	var resp *containerpb.Operation
@@ -828,6 +840,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteCluster[0:len((*c.CallOptions).DeleteCluster):len((*c.CallOptions).DeleteCluster)], opts...)
 	var resp *containerpb.Operation
@@ -849,6 +862,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "parent", url.QueryEscape(req.GetParent()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListOperations[0:len((*c.CallOptions).ListOperations):len((*c.CallOptions).ListOperations)], opts...)
 	var resp *containerpb.ListOperationsResponse
@@ -870,6 +884,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "operation_id", url.QueryEscape(req.GetOperationId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetOperation[0:len((*c.CallOptions).GetOperation):len((*c.CallOptions).GetOperation)], opts...)
 	var resp *containerpb.Operation
@@ -891,6 +906,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "operation_id", url.QueryEscape(req.GetOperationId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelOperation[0:len((*c.CallOptions).CancelOperation):len((*c.CallOptions).CancelOperation)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -908,6 +924,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetServerConfig[0:len((*c.CallOptions).GetServerConfig):len((*c.CallOptions).GetServerConfig)], opts...)
 	var resp *containerpb.ServerConfig
@@ -924,6 +941,7 @@
 
 func (c *clusterManagerGRPCClient) GetJSONWebKeys(ctx context.Context, req *containerpb.GetJSONWebKeysRequest, opts ...gax.CallOption) (*containerpb.GetJSONWebKeysResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJSONWebKeys[0:len((*c.CallOptions).GetJSONWebKeys):len((*c.CallOptions).GetJSONWebKeys)], opts...)
 	var resp *containerpb.GetJSONWebKeysResponse
@@ -945,6 +963,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "parent", url.QueryEscape(req.GetParent()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListNodePools[0:len((*c.CallOptions).ListNodePools):len((*c.CallOptions).ListNodePools)], opts...)
 	var resp *containerpb.ListNodePoolsResponse
@@ -966,6 +985,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId()), "node_pool_id", url.QueryEscape(req.GetNodePoolId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetNodePool[0:len((*c.CallOptions).GetNodePool):len((*c.CallOptions).GetNodePool)], opts...)
 	var resp *containerpb.NodePool
@@ -987,6 +1007,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "parent", url.QueryEscape(req.GetParent()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateNodePool[0:len((*c.CallOptions).CreateNodePool):len((*c.CallOptions).CreateNodePool)], opts...)
 	var resp *containerpb.Operation
@@ -1008,6 +1029,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId()), "node_pool_id", url.QueryEscape(req.GetNodePoolId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteNodePool[0:len((*c.CallOptions).DeleteNodePool):len((*c.CallOptions).DeleteNodePool)], opts...)
 	var resp *containerpb.Operation
@@ -1029,6 +1051,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId()), "node_pool_id", url.QueryEscape(req.GetNodePoolId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RollbackNodePoolUpgrade[0:len((*c.CallOptions).RollbackNodePoolUpgrade):len((*c.CallOptions).RollbackNodePoolUpgrade)], opts...)
 	var resp *containerpb.Operation
@@ -1050,6 +1073,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId()), "node_pool_id", url.QueryEscape(req.GetNodePoolId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetNodePoolManagement[0:len((*c.CallOptions).SetNodePoolManagement):len((*c.CallOptions).SetNodePoolManagement)], opts...)
 	var resp *containerpb.Operation
@@ -1071,6 +1095,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetLabels[0:len((*c.CallOptions).SetLabels):len((*c.CallOptions).SetLabels)], opts...)
 	var resp *containerpb.Operation
@@ -1092,6 +1117,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetLegacyAbac[0:len((*c.CallOptions).SetLegacyAbac):len((*c.CallOptions).SetLegacyAbac)], opts...)
 	var resp *containerpb.Operation
@@ -1113,6 +1139,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartIPRotation[0:len((*c.CallOptions).StartIPRotation):len((*c.CallOptions).StartIPRotation)], opts...)
 	var resp *containerpb.Operation
@@ -1134,6 +1161,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CompleteIPRotation[0:len((*c.CallOptions).CompleteIPRotation):len((*c.CallOptions).CompleteIPRotation)], opts...)
 	var resp *containerpb.Operation
@@ -1155,6 +1183,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId()), "node_pool_id", url.QueryEscape(req.GetNodePoolId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetNodePoolSize[0:len((*c.CallOptions).SetNodePoolSize):len((*c.CallOptions).SetNodePoolSize)], opts...)
 	var resp *containerpb.Operation
@@ -1176,6 +1205,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetNetworkPolicy[0:len((*c.CallOptions).SetNetworkPolicy):len((*c.CallOptions).SetNetworkPolicy)], opts...)
 	var resp *containerpb.Operation
@@ -1197,6 +1227,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "name", url.QueryEscape(req.GetName()), "project_id", url.QueryEscape(req.GetProjectId()), "zone", url.QueryEscape(req.GetZone()), "cluster_id", url.QueryEscape(req.GetClusterId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetMaintenancePolicy[0:len((*c.CallOptions).SetMaintenancePolicy):len((*c.CallOptions).SetMaintenancePolicy)], opts...)
 	var resp *containerpb.Operation
@@ -1213,6 +1244,7 @@
 
 func (c *clusterManagerGRPCClient) ListUsableSubnetworks(ctx context.Context, req *containerpb.ListUsableSubnetworksRequest, opts ...gax.CallOption) *UsableSubnetworkIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListUsableSubnetworks[0:len((*c.CallOptions).ListUsableSubnetworks):len((*c.CallOptions).ListUsableSubnetworks)], opts...)
 	it := &UsableSubnetworkIterator{}
diff --git a/container/apiv1/doc.go b/container/apiv1/doc.go
index 70ba55c..6086f39 100644
--- a/container/apiv1/doc.go
+++ b/container/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/container/apiv1/version.go b/container/apiv1/version.go
new file mode 100644
index 0000000..61ad7f9
--- /dev/null
+++ b/container/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package container
+
+import "cloud.google.com/go/container/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/containeranalysis/apiv1beta1/container_analysis_v1_beta1_client.go b/containeranalysis/apiv1beta1/container_analysis_v1_beta1_client.go
index 2c3d17b..0f4cf37 100644
--- a/containeranalysis/apiv1beta1/container_analysis_v1_beta1_client.go
+++ b/containeranalysis/apiv1beta1/container_analysis_v1_beta1_client.go
@@ -284,7 +284,7 @@
 // use by Google-written clients.
 func (c *containerAnalysisV1Beta1GRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -301,6 +301,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -322,6 +323,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -343,6 +345,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
@@ -364,6 +367,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetScanConfig[0:len((*c.CallOptions).GetScanConfig):len((*c.CallOptions).GetScanConfig)], opts...)
 	var resp *containeranalysispb.ScanConfig
@@ -380,6 +384,7 @@
 
 func (c *containerAnalysisV1Beta1GRPCClient) ListScanConfigs(ctx context.Context, req *containeranalysispb.ListScanConfigsRequest, opts ...gax.CallOption) *ScanConfigIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListScanConfigs[0:len((*c.CallOptions).ListScanConfigs):len((*c.CallOptions).ListScanConfigs)], opts...)
 	it := &ScanConfigIterator{}
@@ -429,6 +434,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateScanConfig[0:len((*c.CallOptions).UpdateScanConfig):len((*c.CallOptions).UpdateScanConfig)], opts...)
 	var resp *containeranalysispb.ScanConfig
diff --git a/containeranalysis/apiv1beta1/doc.go b/containeranalysis/apiv1beta1/doc.go
index 6c0c25a..426bf26 100644
--- a/containeranalysis/apiv1beta1/doc.go
+++ b/containeranalysis/apiv1beta1/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/containeranalysis/apiv1beta1/grafeas_v1_beta1_client.go b/containeranalysis/apiv1beta1/grafeas_v1_beta1_client.go
index 833de29..267300b 100644
--- a/containeranalysis/apiv1beta1/grafeas_v1_beta1_client.go
+++ b/containeranalysis/apiv1beta1/grafeas_v1_beta1_client.go
@@ -419,7 +419,7 @@
 // use by Google-written clients.
 func (c *grafeasV1Beta1GRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -436,6 +436,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetOccurrence[0:len((*c.CallOptions).GetOccurrence):len((*c.CallOptions).GetOccurrence)], opts...)
 	var resp *grafeaspb.Occurrence
@@ -452,6 +453,7 @@
 
 func (c *grafeasV1Beta1GRPCClient) ListOccurrences(ctx context.Context, req *grafeaspb.ListOccurrencesRequest, opts ...gax.CallOption) *OccurrenceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListOccurrences[0:len((*c.CallOptions).ListOccurrences):len((*c.CallOptions).ListOccurrences)], opts...)
 	it := &OccurrenceIterator{}
@@ -501,6 +503,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteOccurrence[0:len((*c.CallOptions).DeleteOccurrence):len((*c.CallOptions).DeleteOccurrence)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -518,6 +521,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateOccurrence[0:len((*c.CallOptions).CreateOccurrence):len((*c.CallOptions).CreateOccurrence)], opts...)
 	var resp *grafeaspb.Occurrence
@@ -539,6 +543,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCreateOccurrences[0:len((*c.CallOptions).BatchCreateOccurrences):len((*c.CallOptions).BatchCreateOccurrences)], opts...)
 	var resp *grafeaspb.BatchCreateOccurrencesResponse
@@ -560,6 +565,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateOccurrence[0:len((*c.CallOptions).UpdateOccurrence):len((*c.CallOptions).UpdateOccurrence)], opts...)
 	var resp *grafeaspb.Occurrence
@@ -581,6 +587,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetOccurrenceNote[0:len((*c.CallOptions).GetOccurrenceNote):len((*c.CallOptions).GetOccurrenceNote)], opts...)
 	var resp *grafeaspb.Note
@@ -602,6 +609,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetNote[0:len((*c.CallOptions).GetNote):len((*c.CallOptions).GetNote)], opts...)
 	var resp *grafeaspb.Note
@@ -618,6 +626,7 @@
 
 func (c *grafeasV1Beta1GRPCClient) ListNotes(ctx context.Context, req *grafeaspb.ListNotesRequest, opts ...gax.CallOption) *NoteIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListNotes[0:len((*c.CallOptions).ListNotes):len((*c.CallOptions).ListNotes)], opts...)
 	it := &NoteIterator{}
@@ -667,6 +676,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteNote[0:len((*c.CallOptions).DeleteNote):len((*c.CallOptions).DeleteNote)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -684,6 +694,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateNote[0:len((*c.CallOptions).CreateNote):len((*c.CallOptions).CreateNote)], opts...)
 	var resp *grafeaspb.Note
@@ -705,6 +716,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCreateNotes[0:len((*c.CallOptions).BatchCreateNotes):len((*c.CallOptions).BatchCreateNotes)], opts...)
 	var resp *grafeaspb.BatchCreateNotesResponse
@@ -726,6 +738,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateNote[0:len((*c.CallOptions).UpdateNote):len((*c.CallOptions).UpdateNote)], opts...)
 	var resp *grafeaspb.Note
@@ -742,6 +755,7 @@
 
 func (c *grafeasV1Beta1GRPCClient) ListNoteOccurrences(ctx context.Context, req *grafeaspb.ListNoteOccurrencesRequest, opts ...gax.CallOption) *OccurrenceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListNoteOccurrences[0:len((*c.CallOptions).ListNoteOccurrences):len((*c.CallOptions).ListNoteOccurrences)], opts...)
 	it := &OccurrenceIterator{}
@@ -791,6 +805,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetVulnerabilityOccurrencesSummary[0:len((*c.CallOptions).GetVulnerabilityOccurrencesSummary):len((*c.CallOptions).GetVulnerabilityOccurrencesSummary)], opts...)
 	var resp *grafeaspb.VulnerabilityOccurrencesSummary
diff --git a/containeranalysis/apiv1beta1/version.go b/containeranalysis/apiv1beta1/version.go
new file mode 100644
index 0000000..67bf734
--- /dev/null
+++ b/containeranalysis/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package containeranalysis
+
+import "cloud.google.com/go/containeranalysis/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/datacatalog/apiv1/data_catalog_client.go b/datacatalog/apiv1/data_catalog_client.go
index 5465c29..dd26641 100644
--- a/datacatalog/apiv1/data_catalog_client.go
+++ b/datacatalog/apiv1/data_catalog_client.go
@@ -708,7 +708,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -768,6 +768,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEntryGroup[0:len((*c.CallOptions).CreateEntryGroup):len((*c.CallOptions).CreateEntryGroup)], opts...)
 	var resp *datacatalogpb.EntryGroup
@@ -789,6 +790,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEntryGroup[0:len((*c.CallOptions).GetEntryGroup):len((*c.CallOptions).GetEntryGroup)], opts...)
 	var resp *datacatalogpb.EntryGroup
@@ -810,6 +812,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entry_group.name", url.QueryEscape(req.GetEntryGroup().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEntryGroup[0:len((*c.CallOptions).UpdateEntryGroup):len((*c.CallOptions).UpdateEntryGroup)], opts...)
 	var resp *datacatalogpb.EntryGroup
@@ -831,6 +834,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEntryGroup[0:len((*c.CallOptions).DeleteEntryGroup):len((*c.CallOptions).DeleteEntryGroup)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -843,6 +847,7 @@
 
 func (c *gRPCClient) ListEntryGroups(ctx context.Context, req *datacatalogpb.ListEntryGroupsRequest, opts ...gax.CallOption) *EntryGroupIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEntryGroups[0:len((*c.CallOptions).ListEntryGroups):len((*c.CallOptions).ListEntryGroups)], opts...)
 	it := &EntryGroupIterator{}
@@ -892,6 +897,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEntry[0:len((*c.CallOptions).CreateEntry):len((*c.CallOptions).CreateEntry)], opts...)
 	var resp *datacatalogpb.Entry
@@ -913,6 +919,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entry.name", url.QueryEscape(req.GetEntry().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEntry[0:len((*c.CallOptions).UpdateEntry):len((*c.CallOptions).UpdateEntry)], opts...)
 	var resp *datacatalogpb.Entry
@@ -934,6 +941,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEntry[0:len((*c.CallOptions).DeleteEntry):len((*c.CallOptions).DeleteEntry)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -951,6 +959,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEntry[0:len((*c.CallOptions).GetEntry):len((*c.CallOptions).GetEntry)], opts...)
 	var resp *datacatalogpb.Entry
@@ -987,6 +996,7 @@
 
 func (c *gRPCClient) ListEntries(ctx context.Context, req *datacatalogpb.ListEntriesRequest, opts ...gax.CallOption) *EntryIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEntries[0:len((*c.CallOptions).ListEntries):len((*c.CallOptions).ListEntries)], opts...)
 	it := &EntryIterator{}
@@ -1036,6 +1046,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ModifyEntryOverview[0:len((*c.CallOptions).ModifyEntryOverview):len((*c.CallOptions).ModifyEntryOverview)], opts...)
 	var resp *datacatalogpb.EntryOverview
@@ -1057,6 +1068,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ModifyEntryContacts[0:len((*c.CallOptions).ModifyEntryContacts):len((*c.CallOptions).ModifyEntryContacts)], opts...)
 	var resp *datacatalogpb.Contacts
@@ -1078,6 +1090,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTagTemplate[0:len((*c.CallOptions).CreateTagTemplate):len((*c.CallOptions).CreateTagTemplate)], opts...)
 	var resp *datacatalogpb.TagTemplate
@@ -1099,6 +1112,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTagTemplate[0:len((*c.CallOptions).GetTagTemplate):len((*c.CallOptions).GetTagTemplate)], opts...)
 	var resp *datacatalogpb.TagTemplate
@@ -1120,6 +1134,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tag_template.name", url.QueryEscape(req.GetTagTemplate().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTagTemplate[0:len((*c.CallOptions).UpdateTagTemplate):len((*c.CallOptions).UpdateTagTemplate)], opts...)
 	var resp *datacatalogpb.TagTemplate
@@ -1141,6 +1156,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTagTemplate[0:len((*c.CallOptions).DeleteTagTemplate):len((*c.CallOptions).DeleteTagTemplate)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1158,6 +1174,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTagTemplateField[0:len((*c.CallOptions).CreateTagTemplateField):len((*c.CallOptions).CreateTagTemplateField)], opts...)
 	var resp *datacatalogpb.TagTemplateField
@@ -1179,6 +1196,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTagTemplateField[0:len((*c.CallOptions).UpdateTagTemplateField):len((*c.CallOptions).UpdateTagTemplateField)], opts...)
 	var resp *datacatalogpb.TagTemplateField
@@ -1200,6 +1218,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RenameTagTemplateField[0:len((*c.CallOptions).RenameTagTemplateField):len((*c.CallOptions).RenameTagTemplateField)], opts...)
 	var resp *datacatalogpb.TagTemplateField
@@ -1221,6 +1240,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RenameTagTemplateFieldEnumValue[0:len((*c.CallOptions).RenameTagTemplateFieldEnumValue):len((*c.CallOptions).RenameTagTemplateFieldEnumValue)], opts...)
 	var resp *datacatalogpb.TagTemplateField
@@ -1242,6 +1262,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTagTemplateField[0:len((*c.CallOptions).DeleteTagTemplateField):len((*c.CallOptions).DeleteTagTemplateField)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1259,6 +1280,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTag[0:len((*c.CallOptions).CreateTag):len((*c.CallOptions).CreateTag)], opts...)
 	var resp *datacatalogpb.Tag
@@ -1280,6 +1302,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tag.name", url.QueryEscape(req.GetTag().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTag[0:len((*c.CallOptions).UpdateTag):len((*c.CallOptions).UpdateTag)], opts...)
 	var resp *datacatalogpb.Tag
@@ -1301,6 +1324,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTag[0:len((*c.CallOptions).DeleteTag):len((*c.CallOptions).DeleteTag)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1313,6 +1337,7 @@
 
 func (c *gRPCClient) ListTags(ctx context.Context, req *datacatalogpb.ListTagsRequest, opts ...gax.CallOption) *TagIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTags[0:len((*c.CallOptions).ListTags):len((*c.CallOptions).ListTags)], opts...)
 	it := &TagIterator{}
@@ -1362,6 +1387,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StarEntry[0:len((*c.CallOptions).StarEntry):len((*c.CallOptions).StarEntry)], opts...)
 	var resp *datacatalogpb.StarEntryResponse
@@ -1383,6 +1409,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UnstarEntry[0:len((*c.CallOptions).UnstarEntry):len((*c.CallOptions).UnstarEntry)], opts...)
 	var resp *datacatalogpb.UnstarEntryResponse
@@ -1404,6 +1431,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -1425,6 +1453,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -1446,6 +1475,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/datacatalog/apiv1/doc.go b/datacatalog/apiv1/doc.go
index 68f2c9e..a472c99 100644
--- a/datacatalog/apiv1/doc.go
+++ b/datacatalog/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/datacatalog/apiv1/policy_tag_manager_client.go b/datacatalog/apiv1/policy_tag_manager_client.go
index 8ccf0f2..2aea2c8 100644
--- a/datacatalog/apiv1/policy_tag_manager_client.go
+++ b/datacatalog/apiv1/policy_tag_manager_client.go
@@ -298,7 +298,7 @@
 // use by Google-written clients.
 func (c *policyTagManagerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -315,6 +315,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTaxonomy[0:len((*c.CallOptions).CreateTaxonomy):len((*c.CallOptions).CreateTaxonomy)], opts...)
 	var resp *datacatalogpb.Taxonomy
@@ -336,6 +337,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTaxonomy[0:len((*c.CallOptions).DeleteTaxonomy):len((*c.CallOptions).DeleteTaxonomy)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -353,6 +355,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "taxonomy.name", url.QueryEscape(req.GetTaxonomy().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTaxonomy[0:len((*c.CallOptions).UpdateTaxonomy):len((*c.CallOptions).UpdateTaxonomy)], opts...)
 	var resp *datacatalogpb.Taxonomy
@@ -369,6 +372,7 @@
 
 func (c *policyTagManagerGRPCClient) ListTaxonomies(ctx context.Context, req *datacatalogpb.ListTaxonomiesRequest, opts ...gax.CallOption) *TaxonomyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTaxonomies[0:len((*c.CallOptions).ListTaxonomies):len((*c.CallOptions).ListTaxonomies)], opts...)
 	it := &TaxonomyIterator{}
@@ -418,6 +422,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTaxonomy[0:len((*c.CallOptions).GetTaxonomy):len((*c.CallOptions).GetTaxonomy)], opts...)
 	var resp *datacatalogpb.Taxonomy
@@ -439,6 +444,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreatePolicyTag[0:len((*c.CallOptions).CreatePolicyTag):len((*c.CallOptions).CreatePolicyTag)], opts...)
 	var resp *datacatalogpb.PolicyTag
@@ -460,6 +466,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePolicyTag[0:len((*c.CallOptions).DeletePolicyTag):len((*c.CallOptions).DeletePolicyTag)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -477,6 +484,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "policy_tag.name", url.QueryEscape(req.GetPolicyTag().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdatePolicyTag[0:len((*c.CallOptions).UpdatePolicyTag):len((*c.CallOptions).UpdatePolicyTag)], opts...)
 	var resp *datacatalogpb.PolicyTag
@@ -493,6 +501,7 @@
 
 func (c *policyTagManagerGRPCClient) ListPolicyTags(ctx context.Context, req *datacatalogpb.ListPolicyTagsRequest, opts ...gax.CallOption) *PolicyTagIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPolicyTags[0:len((*c.CallOptions).ListPolicyTags):len((*c.CallOptions).ListPolicyTags)], opts...)
 	it := &PolicyTagIterator{}
@@ -542,6 +551,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPolicyTag[0:len((*c.CallOptions).GetPolicyTag):len((*c.CallOptions).GetPolicyTag)], opts...)
 	var resp *datacatalogpb.PolicyTag
@@ -563,6 +573,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -584,6 +595,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -605,6 +617,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/datacatalog/apiv1/policy_tag_manager_serialization_client.go b/datacatalog/apiv1/policy_tag_manager_serialization_client.go
index c6d3d69..a12a5a9 100644
--- a/datacatalog/apiv1/policy_tag_manager_serialization_client.go
+++ b/datacatalog/apiv1/policy_tag_manager_serialization_client.go
@@ -222,7 +222,7 @@
 // use by Google-written clients.
 func (c *policyTagManagerSerializationGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -239,6 +239,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReplaceTaxonomy[0:len((*c.CallOptions).ReplaceTaxonomy):len((*c.CallOptions).ReplaceTaxonomy)], opts...)
 	var resp *datacatalogpb.Taxonomy
@@ -260,6 +261,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportTaxonomies[0:len((*c.CallOptions).ImportTaxonomies):len((*c.CallOptions).ImportTaxonomies)], opts...)
 	var resp *datacatalogpb.ImportTaxonomiesResponse
@@ -281,6 +283,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportTaxonomies[0:len((*c.CallOptions).ExportTaxonomies):len((*c.CallOptions).ExportTaxonomies)], opts...)
 	var resp *datacatalogpb.ExportTaxonomiesResponse
diff --git a/datacatalog/apiv1/version.go b/datacatalog/apiv1/version.go
new file mode 100644
index 0000000..03870bd
--- /dev/null
+++ b/datacatalog/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package datacatalog
+
+import "cloud.google.com/go/datacatalog/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/datacatalog/apiv1beta1/data_catalog_client.go b/datacatalog/apiv1beta1/data_catalog_client.go
index 9479a92..b26eb07 100644
--- a/datacatalog/apiv1beta1/data_catalog_client.go
+++ b/datacatalog/apiv1beta1/data_catalog_client.go
@@ -638,7 +638,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -698,6 +698,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEntryGroup[0:len((*c.CallOptions).CreateEntryGroup):len((*c.CallOptions).CreateEntryGroup)], opts...)
 	var resp *datacatalogpb.EntryGroup
@@ -719,6 +720,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entry_group.name", url.QueryEscape(req.GetEntryGroup().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEntryGroup[0:len((*c.CallOptions).UpdateEntryGroup):len((*c.CallOptions).UpdateEntryGroup)], opts...)
 	var resp *datacatalogpb.EntryGroup
@@ -740,6 +742,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEntryGroup[0:len((*c.CallOptions).GetEntryGroup):len((*c.CallOptions).GetEntryGroup)], opts...)
 	var resp *datacatalogpb.EntryGroup
@@ -761,6 +764,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEntryGroup[0:len((*c.CallOptions).DeleteEntryGroup):len((*c.CallOptions).DeleteEntryGroup)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -773,6 +777,7 @@
 
 func (c *gRPCClient) ListEntryGroups(ctx context.Context, req *datacatalogpb.ListEntryGroupsRequest, opts ...gax.CallOption) *EntryGroupIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEntryGroups[0:len((*c.CallOptions).ListEntryGroups):len((*c.CallOptions).ListEntryGroups)], opts...)
 	it := &EntryGroupIterator{}
@@ -822,6 +827,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEntry[0:len((*c.CallOptions).CreateEntry):len((*c.CallOptions).CreateEntry)], opts...)
 	var resp *datacatalogpb.Entry
@@ -843,6 +849,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entry.name", url.QueryEscape(req.GetEntry().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEntry[0:len((*c.CallOptions).UpdateEntry):len((*c.CallOptions).UpdateEntry)], opts...)
 	var resp *datacatalogpb.Entry
@@ -864,6 +871,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEntry[0:len((*c.CallOptions).DeleteEntry):len((*c.CallOptions).DeleteEntry)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -881,6 +889,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEntry[0:len((*c.CallOptions).GetEntry):len((*c.CallOptions).GetEntry)], opts...)
 	var resp *datacatalogpb.Entry
@@ -917,6 +926,7 @@
 
 func (c *gRPCClient) ListEntries(ctx context.Context, req *datacatalogpb.ListEntriesRequest, opts ...gax.CallOption) *EntryIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEntries[0:len((*c.CallOptions).ListEntries):len((*c.CallOptions).ListEntries)], opts...)
 	it := &EntryIterator{}
@@ -966,6 +976,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTagTemplate[0:len((*c.CallOptions).CreateTagTemplate):len((*c.CallOptions).CreateTagTemplate)], opts...)
 	var resp *datacatalogpb.TagTemplate
@@ -987,6 +998,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTagTemplate[0:len((*c.CallOptions).GetTagTemplate):len((*c.CallOptions).GetTagTemplate)], opts...)
 	var resp *datacatalogpb.TagTemplate
@@ -1008,6 +1020,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tag_template.name", url.QueryEscape(req.GetTagTemplate().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTagTemplate[0:len((*c.CallOptions).UpdateTagTemplate):len((*c.CallOptions).UpdateTagTemplate)], opts...)
 	var resp *datacatalogpb.TagTemplate
@@ -1029,6 +1042,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTagTemplate[0:len((*c.CallOptions).DeleteTagTemplate):len((*c.CallOptions).DeleteTagTemplate)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1046,6 +1060,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTagTemplateField[0:len((*c.CallOptions).CreateTagTemplateField):len((*c.CallOptions).CreateTagTemplateField)], opts...)
 	var resp *datacatalogpb.TagTemplateField
@@ -1067,6 +1082,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTagTemplateField[0:len((*c.CallOptions).UpdateTagTemplateField):len((*c.CallOptions).UpdateTagTemplateField)], opts...)
 	var resp *datacatalogpb.TagTemplateField
@@ -1088,6 +1104,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RenameTagTemplateField[0:len((*c.CallOptions).RenameTagTemplateField):len((*c.CallOptions).RenameTagTemplateField)], opts...)
 	var resp *datacatalogpb.TagTemplateField
@@ -1109,6 +1126,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTagTemplateField[0:len((*c.CallOptions).DeleteTagTemplateField):len((*c.CallOptions).DeleteTagTemplateField)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1126,6 +1144,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTag[0:len((*c.CallOptions).CreateTag):len((*c.CallOptions).CreateTag)], opts...)
 	var resp *datacatalogpb.Tag
@@ -1147,6 +1166,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tag.name", url.QueryEscape(req.GetTag().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTag[0:len((*c.CallOptions).UpdateTag):len((*c.CallOptions).UpdateTag)], opts...)
 	var resp *datacatalogpb.Tag
@@ -1168,6 +1188,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTag[0:len((*c.CallOptions).DeleteTag):len((*c.CallOptions).DeleteTag)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1180,6 +1201,7 @@
 
 func (c *gRPCClient) ListTags(ctx context.Context, req *datacatalogpb.ListTagsRequest, opts ...gax.CallOption) *TagIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTags[0:len((*c.CallOptions).ListTags):len((*c.CallOptions).ListTags)], opts...)
 	it := &TagIterator{}
@@ -1229,6 +1251,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -1250,6 +1273,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -1271,6 +1295,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/datacatalog/apiv1beta1/doc.go b/datacatalog/apiv1beta1/doc.go
index 61c674d..e99ec7e 100644
--- a/datacatalog/apiv1beta1/doc.go
+++ b/datacatalog/apiv1beta1/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/datacatalog/apiv1beta1/policy_tag_manager_client.go b/datacatalog/apiv1beta1/policy_tag_manager_client.go
index 6127dd3..9ae5bcc 100644
--- a/datacatalog/apiv1beta1/policy_tag_manager_client.go
+++ b/datacatalog/apiv1beta1/policy_tag_manager_client.go
@@ -277,7 +277,7 @@
 // use by Google-written clients.
 func (c *policyTagManagerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -289,6 +289,7 @@
 
 func (c *policyTagManagerGRPCClient) CreateTaxonomy(ctx context.Context, req *datacatalogpb.CreateTaxonomyRequest, opts ...gax.CallOption) (*datacatalogpb.Taxonomy, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTaxonomy[0:len((*c.CallOptions).CreateTaxonomy):len((*c.CallOptions).CreateTaxonomy)], opts...)
 	var resp *datacatalogpb.Taxonomy
@@ -305,6 +306,7 @@
 
 func (c *policyTagManagerGRPCClient) DeleteTaxonomy(ctx context.Context, req *datacatalogpb.DeleteTaxonomyRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTaxonomy[0:len((*c.CallOptions).DeleteTaxonomy):len((*c.CallOptions).DeleteTaxonomy)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -317,6 +319,7 @@
 
 func (c *policyTagManagerGRPCClient) UpdateTaxonomy(ctx context.Context, req *datacatalogpb.UpdateTaxonomyRequest, opts ...gax.CallOption) (*datacatalogpb.Taxonomy, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "taxonomy.name", url.QueryEscape(req.GetTaxonomy().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTaxonomy[0:len((*c.CallOptions).UpdateTaxonomy):len((*c.CallOptions).UpdateTaxonomy)], opts...)
 	var resp *datacatalogpb.Taxonomy
@@ -333,6 +336,7 @@
 
 func (c *policyTagManagerGRPCClient) ListTaxonomies(ctx context.Context, req *datacatalogpb.ListTaxonomiesRequest, opts ...gax.CallOption) *TaxonomyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTaxonomies[0:len((*c.CallOptions).ListTaxonomies):len((*c.CallOptions).ListTaxonomies)], opts...)
 	it := &TaxonomyIterator{}
@@ -377,6 +381,7 @@
 
 func (c *policyTagManagerGRPCClient) GetTaxonomy(ctx context.Context, req *datacatalogpb.GetTaxonomyRequest, opts ...gax.CallOption) (*datacatalogpb.Taxonomy, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTaxonomy[0:len((*c.CallOptions).GetTaxonomy):len((*c.CallOptions).GetTaxonomy)], opts...)
 	var resp *datacatalogpb.Taxonomy
@@ -393,6 +398,7 @@
 
 func (c *policyTagManagerGRPCClient) CreatePolicyTag(ctx context.Context, req *datacatalogpb.CreatePolicyTagRequest, opts ...gax.CallOption) (*datacatalogpb.PolicyTag, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreatePolicyTag[0:len((*c.CallOptions).CreatePolicyTag):len((*c.CallOptions).CreatePolicyTag)], opts...)
 	var resp *datacatalogpb.PolicyTag
@@ -409,6 +415,7 @@
 
 func (c *policyTagManagerGRPCClient) DeletePolicyTag(ctx context.Context, req *datacatalogpb.DeletePolicyTagRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePolicyTag[0:len((*c.CallOptions).DeletePolicyTag):len((*c.CallOptions).DeletePolicyTag)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -421,6 +428,7 @@
 
 func (c *policyTagManagerGRPCClient) UpdatePolicyTag(ctx context.Context, req *datacatalogpb.UpdatePolicyTagRequest, opts ...gax.CallOption) (*datacatalogpb.PolicyTag, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "policy_tag.name", url.QueryEscape(req.GetPolicyTag().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdatePolicyTag[0:len((*c.CallOptions).UpdatePolicyTag):len((*c.CallOptions).UpdatePolicyTag)], opts...)
 	var resp *datacatalogpb.PolicyTag
@@ -437,6 +445,7 @@
 
 func (c *policyTagManagerGRPCClient) ListPolicyTags(ctx context.Context, req *datacatalogpb.ListPolicyTagsRequest, opts ...gax.CallOption) *PolicyTagIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPolicyTags[0:len((*c.CallOptions).ListPolicyTags):len((*c.CallOptions).ListPolicyTags)], opts...)
 	it := &PolicyTagIterator{}
@@ -481,6 +490,7 @@
 
 func (c *policyTagManagerGRPCClient) GetPolicyTag(ctx context.Context, req *datacatalogpb.GetPolicyTagRequest, opts ...gax.CallOption) (*datacatalogpb.PolicyTag, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPolicyTag[0:len((*c.CallOptions).GetPolicyTag):len((*c.CallOptions).GetPolicyTag)], opts...)
 	var resp *datacatalogpb.PolicyTag
@@ -497,6 +507,7 @@
 
 func (c *policyTagManagerGRPCClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -513,6 +524,7 @@
 
 func (c *policyTagManagerGRPCClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -529,6 +541,7 @@
 
 func (c *policyTagManagerGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/datacatalog/apiv1beta1/policy_tag_manager_serialization_client.go b/datacatalog/apiv1beta1/policy_tag_manager_serialization_client.go
index b1eca20..3670b71 100644
--- a/datacatalog/apiv1beta1/policy_tag_manager_serialization_client.go
+++ b/datacatalog/apiv1beta1/policy_tag_manager_serialization_client.go
@@ -190,7 +190,7 @@
 // use by Google-written clients.
 func (c *policyTagManagerSerializationGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -202,6 +202,7 @@
 
 func (c *policyTagManagerSerializationGRPCClient) ImportTaxonomies(ctx context.Context, req *datacatalogpb.ImportTaxonomiesRequest, opts ...gax.CallOption) (*datacatalogpb.ImportTaxonomiesResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportTaxonomies[0:len((*c.CallOptions).ImportTaxonomies):len((*c.CallOptions).ImportTaxonomies)], opts...)
 	var resp *datacatalogpb.ImportTaxonomiesResponse
@@ -218,6 +219,7 @@
 
 func (c *policyTagManagerSerializationGRPCClient) ExportTaxonomies(ctx context.Context, req *datacatalogpb.ExportTaxonomiesRequest, opts ...gax.CallOption) (*datacatalogpb.ExportTaxonomiesResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportTaxonomies[0:len((*c.CallOptions).ExportTaxonomies):len((*c.CallOptions).ExportTaxonomies)], opts...)
 	var resp *datacatalogpb.ExportTaxonomiesResponse
diff --git a/datacatalog/apiv1beta1/version.go b/datacatalog/apiv1beta1/version.go
new file mode 100644
index 0000000..03870bd
--- /dev/null
+++ b/datacatalog/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package datacatalog
+
+import "cloud.google.com/go/datacatalog/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/dataflow/apiv1beta3/doc.go b/dataflow/apiv1beta3/doc.go
index a79d3cd..74b0cae 100644
--- a/dataflow/apiv1beta3/doc.go
+++ b/dataflow/apiv1beta3/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dataflow/apiv1beta3/flex_templates_client.go b/dataflow/apiv1beta3/flex_templates_client.go
index 0fe06d1..bf6bb64 100644
--- a/dataflow/apiv1beta3/flex_templates_client.go
+++ b/dataflow/apiv1beta3/flex_templates_client.go
@@ -173,7 +173,7 @@
 // use by Google-written clients.
 func (c *flexTemplatesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -185,6 +185,7 @@
 
 func (c *flexTemplatesGRPCClient) LaunchFlexTemplate(ctx context.Context, req *dataflowpb.LaunchFlexTemplateRequest, opts ...gax.CallOption) (*dataflowpb.LaunchFlexTemplateResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LaunchFlexTemplate[0:len((*c.CallOptions).LaunchFlexTemplate):len((*c.CallOptions).LaunchFlexTemplate)], opts...)
 	var resp *dataflowpb.LaunchFlexTemplateResponse
diff --git a/dataflow/apiv1beta3/jobs_v1_beta3_client.go b/dataflow/apiv1beta3/jobs_v1_beta3_client.go
index 1784daf..654e3f3 100644
--- a/dataflow/apiv1beta3/jobs_v1_beta3_client.go
+++ b/dataflow/apiv1beta3/jobs_v1_beta3_client.go
@@ -251,7 +251,7 @@
 // use by Google-written clients.
 func (c *jobsV1Beta3GRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -268,6 +268,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateJob[0:len((*c.CallOptions).CreateJob):len((*c.CallOptions).CreateJob)], opts...)
 	var resp *dataflowpb.Job
@@ -288,7 +289,8 @@
 		defer cancel()
 		ctx = cctx
 	}
-	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "job_id", url.QueryEscape(req.GetJobId()), "location", url.QueryEscape(req.GetLocation())))
+	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation()), "job_id", url.QueryEscape(req.GetJobId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJob[0:len((*c.CallOptions).GetJob):len((*c.CallOptions).GetJob)], opts...)
 	var resp *dataflowpb.Job
@@ -309,7 +311,8 @@
 		defer cancel()
 		ctx = cctx
 	}
-	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "job_id", url.QueryEscape(req.GetJobId()), "location", url.QueryEscape(req.GetLocation())))
+	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation()), "job_id", url.QueryEscape(req.GetJobId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateJob[0:len((*c.CallOptions).UpdateJob):len((*c.CallOptions).UpdateJob)], opts...)
 	var resp *dataflowpb.Job
@@ -326,6 +329,7 @@
 
 func (c *jobsV1Beta3GRPCClient) ListJobs(ctx context.Context, req *dataflowpb.ListJobsRequest, opts ...gax.CallOption) *JobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListJobs[0:len((*c.CallOptions).ListJobs):len((*c.CallOptions).ListJobs)], opts...)
 	it := &JobIterator{}
@@ -370,6 +374,7 @@
 
 func (c *jobsV1Beta3GRPCClient) AggregatedListJobs(ctx context.Context, req *dataflowpb.ListJobsRequest, opts ...gax.CallOption) *JobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AggregatedListJobs[0:len((*c.CallOptions).AggregatedListJobs):len((*c.CallOptions).AggregatedListJobs)], opts...)
 	it := &JobIterator{}
@@ -438,7 +443,8 @@
 		defer cancel()
 		ctx = cctx
 	}
-	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "job_id", url.QueryEscape(req.GetJobId()), "location", url.QueryEscape(req.GetLocation())))
+	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation()), "job_id", url.QueryEscape(req.GetJobId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SnapshotJob[0:len((*c.CallOptions).SnapshotJob):len((*c.CallOptions).SnapshotJob)], opts...)
 	var resp *dataflowpb.Snapshot
diff --git a/dataflow/apiv1beta3/messages_v1_beta3_client.go b/dataflow/apiv1beta3/messages_v1_beta3_client.go
index bba50fb..9981883 100644
--- a/dataflow/apiv1beta3/messages_v1_beta3_client.go
+++ b/dataflow/apiv1beta3/messages_v1_beta3_client.go
@@ -183,7 +183,7 @@
 // use by Google-written clients.
 func (c *messagesV1Beta3GRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -194,7 +194,8 @@
 }
 
 func (c *messagesV1Beta3GRPCClient) ListJobMessages(ctx context.Context, req *dataflowpb.ListJobMessagesRequest, opts ...gax.CallOption) *JobMessageIterator {
-	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "job_id", url.QueryEscape(req.GetJobId()), "location", url.QueryEscape(req.GetLocation())))
+	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation()), "job_id", url.QueryEscape(req.GetJobId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListJobMessages[0:len((*c.CallOptions).ListJobMessages):len((*c.CallOptions).ListJobMessages)], opts...)
 	it := &JobMessageIterator{}
diff --git a/dataflow/apiv1beta3/metrics_v1_beta3_client.go b/dataflow/apiv1beta3/metrics_v1_beta3_client.go
index 850d6ab..ee48a7b 100644
--- a/dataflow/apiv1beta3/metrics_v1_beta3_client.go
+++ b/dataflow/apiv1beta3/metrics_v1_beta3_client.go
@@ -205,7 +205,7 @@
 // use by Google-written clients.
 func (c *metricsV1Beta3GRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -221,7 +221,8 @@
 		defer cancel()
 		ctx = cctx
 	}
-	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "job_id", url.QueryEscape(req.GetJobId()), "location", url.QueryEscape(req.GetLocation())))
+	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation()), "job_id", url.QueryEscape(req.GetJobId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJobMetrics[0:len((*c.CallOptions).GetJobMetrics):len((*c.CallOptions).GetJobMetrics)], opts...)
 	var resp *dataflowpb.JobMetrics
@@ -238,6 +239,7 @@
 
 func (c *metricsV1Beta3GRPCClient) GetJobExecutionDetails(ctx context.Context, req *dataflowpb.GetJobExecutionDetailsRequest, opts ...gax.CallOption) *StageSummaryIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation()), "job_id", url.QueryEscape(req.GetJobId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJobExecutionDetails[0:len((*c.CallOptions).GetJobExecutionDetails):len((*c.CallOptions).GetJobExecutionDetails)], opts...)
 	it := &StageSummaryIterator{}
@@ -282,6 +284,7 @@
 
 func (c *metricsV1Beta3GRPCClient) GetStageExecutionDetails(ctx context.Context, req *dataflowpb.GetStageExecutionDetailsRequest, opts ...gax.CallOption) *WorkerDetailsIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation()), "job_id", url.QueryEscape(req.GetJobId()), "stage_id", url.QueryEscape(req.GetStageId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetStageExecutionDetails[0:len((*c.CallOptions).GetStageExecutionDetails):len((*c.CallOptions).GetStageExecutionDetails)], opts...)
 	it := &WorkerDetailsIterator{}
diff --git a/dataflow/apiv1beta3/snapshots_v1_beta3_client.go b/dataflow/apiv1beta3/snapshots_v1_beta3_client.go
index 880b7ef..9019cf6 100644
--- a/dataflow/apiv1beta3/snapshots_v1_beta3_client.go
+++ b/dataflow/apiv1beta3/snapshots_v1_beta3_client.go
@@ -190,7 +190,7 @@
 // use by Google-written clients.
 func (c *snapshotsV1Beta3GRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -206,7 +206,8 @@
 		defer cancel()
 		ctx = cctx
 	}
-	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "snapshot_id", url.QueryEscape(req.GetSnapshotId()), "location", url.QueryEscape(req.GetLocation())))
+	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation()), "snapshot_id", url.QueryEscape(req.GetSnapshotId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSnapshot[0:len((*c.CallOptions).GetSnapshot):len((*c.CallOptions).GetSnapshot)], opts...)
 	var resp *dataflowpb.Snapshot
@@ -228,6 +229,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation()), "snapshot_id", url.QueryEscape(req.GetSnapshotId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSnapshot[0:len((*c.CallOptions).DeleteSnapshot):len((*c.CallOptions).DeleteSnapshot)], opts...)
 	var resp *dataflowpb.DeleteSnapshotResponse
@@ -249,6 +251,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation()), "job_id", url.QueryEscape(req.GetJobId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSnapshots[0:len((*c.CallOptions).ListSnapshots):len((*c.CallOptions).ListSnapshots)], opts...)
 	var resp *dataflowpb.ListSnapshotsResponse
diff --git a/dataflow/apiv1beta3/templates_client.go b/dataflow/apiv1beta3/templates_client.go
index 60f6349..bbec4d4 100644
--- a/dataflow/apiv1beta3/templates_client.go
+++ b/dataflow/apiv1beta3/templates_client.go
@@ -190,7 +190,7 @@
 // use by Google-written clients.
 func (c *templatesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -207,6 +207,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateJobFromTemplate[0:len((*c.CallOptions).CreateJobFromTemplate):len((*c.CallOptions).CreateJobFromTemplate)], opts...)
 	var resp *dataflowpb.Job
@@ -228,6 +229,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LaunchTemplate[0:len((*c.CallOptions).LaunchTemplate):len((*c.CallOptions).LaunchTemplate)], opts...)
 	var resp *dataflowpb.LaunchTemplateResponse
@@ -249,6 +251,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTemplate[0:len((*c.CallOptions).GetTemplate):len((*c.CallOptions).GetTemplate)], opts...)
 	var resp *dataflowpb.GetTemplateResponse
diff --git a/dataflow/apiv1beta3/version.go b/dataflow/apiv1beta3/version.go
new file mode 100644
index 0000000..db89334
--- /dev/null
+++ b/dataflow/apiv1beta3/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package dataflow
+
+import "cloud.google.com/go/dataflow/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/datafusion/apiv1/data_fusion_client.go b/datafusion/apiv1/data_fusion_client.go
index e7cbdb3..bb15ca3 100644
--- a/datafusion/apiv1/data_fusion_client.go
+++ b/datafusion/apiv1/data_fusion_client.go
@@ -282,7 +282,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -294,6 +294,7 @@
 
 func (c *gRPCClient) ListAvailableVersions(ctx context.Context, req *datafusionpb.ListAvailableVersionsRequest, opts ...gax.CallOption) *VersionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAvailableVersions[0:len((*c.CallOptions).ListAvailableVersions):len((*c.CallOptions).ListAvailableVersions)], opts...)
 	it := &VersionIterator{}
@@ -338,6 +339,7 @@
 
 func (c *gRPCClient) ListInstances(ctx context.Context, req *datafusionpb.ListInstancesRequest, opts ...gax.CallOption) *InstanceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInstances[0:len((*c.CallOptions).ListInstances):len((*c.CallOptions).ListInstances)], opts...)
 	it := &InstanceIterator{}
@@ -387,6 +389,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstance[0:len((*c.CallOptions).GetInstance):len((*c.CallOptions).GetInstance)], opts...)
 	var resp *datafusionpb.Instance
@@ -408,6 +411,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateInstance[0:len((*c.CallOptions).CreateInstance):len((*c.CallOptions).CreateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -431,6 +435,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteInstance[0:len((*c.CallOptions).DeleteInstance):len((*c.CallOptions).DeleteInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -454,6 +459,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "instance.name", url.QueryEscape(req.GetInstance().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateInstance[0:len((*c.CallOptions).UpdateInstance):len((*c.CallOptions).UpdateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -477,6 +483,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RestartInstance[0:len((*c.CallOptions).RestartInstance):len((*c.CallOptions).RestartInstance)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/datafusion/apiv1/doc.go b/datafusion/apiv1/doc.go
index 3ddbb5f..ccf67f7 100644
--- a/datafusion/apiv1/doc.go
+++ b/datafusion/apiv1/doc.go
@@ -96,7 +96,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/datafusion/apiv1/version.go b/datafusion/apiv1/version.go
new file mode 100644
index 0000000..05df5be
--- /dev/null
+++ b/datafusion/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package datafusion
+
+import "cloud.google.com/go/datafusion/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/datalabeling/apiv1beta1/data_labeling_client.go b/datalabeling/apiv1beta1/data_labeling_client.go
index abe5a4b..4a6866a 100644
--- a/datalabeling/apiv1beta1/data_labeling_client.go
+++ b/datalabeling/apiv1beta1/data_labeling_client.go
@@ -758,7 +758,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -775,6 +775,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDataset[0:len((*c.CallOptions).CreateDataset):len((*c.CallOptions).CreateDataset)], opts...)
 	var resp *datalabelingpb.Dataset
@@ -796,6 +797,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDataset[0:len((*c.CallOptions).GetDataset):len((*c.CallOptions).GetDataset)], opts...)
 	var resp *datalabelingpb.Dataset
@@ -812,6 +814,7 @@
 
 func (c *gRPCClient) ListDatasets(ctx context.Context, req *datalabelingpb.ListDatasetsRequest, opts ...gax.CallOption) *DatasetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDatasets[0:len((*c.CallOptions).ListDatasets):len((*c.CallOptions).ListDatasets)], opts...)
 	it := &DatasetIterator{}
@@ -861,6 +864,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDataset[0:len((*c.CallOptions).DeleteDataset):len((*c.CallOptions).DeleteDataset)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -878,6 +882,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportData[0:len((*c.CallOptions).ImportData):len((*c.CallOptions).ImportData)], opts...)
 	var resp *longrunningpb.Operation
@@ -901,6 +906,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportData[0:len((*c.CallOptions).ExportData):len((*c.CallOptions).ExportData)], opts...)
 	var resp *longrunningpb.Operation
@@ -924,6 +930,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDataItem[0:len((*c.CallOptions).GetDataItem):len((*c.CallOptions).GetDataItem)], opts...)
 	var resp *datalabelingpb.DataItem
@@ -940,6 +947,7 @@
 
 func (c *gRPCClient) ListDataItems(ctx context.Context, req *datalabelingpb.ListDataItemsRequest, opts ...gax.CallOption) *DataItemIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDataItems[0:len((*c.CallOptions).ListDataItems):len((*c.CallOptions).ListDataItems)], opts...)
 	it := &DataItemIterator{}
@@ -989,6 +997,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAnnotatedDataset[0:len((*c.CallOptions).GetAnnotatedDataset):len((*c.CallOptions).GetAnnotatedDataset)], opts...)
 	var resp *datalabelingpb.AnnotatedDataset
@@ -1005,6 +1014,7 @@
 
 func (c *gRPCClient) ListAnnotatedDatasets(ctx context.Context, req *datalabelingpb.ListAnnotatedDatasetsRequest, opts ...gax.CallOption) *AnnotatedDatasetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAnnotatedDatasets[0:len((*c.CallOptions).ListAnnotatedDatasets):len((*c.CallOptions).ListAnnotatedDatasets)], opts...)
 	it := &AnnotatedDatasetIterator{}
@@ -1049,6 +1059,7 @@
 
 func (c *gRPCClient) DeleteAnnotatedDataset(ctx context.Context, req *datalabelingpb.DeleteAnnotatedDatasetRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAnnotatedDataset[0:len((*c.CallOptions).DeleteAnnotatedDataset):len((*c.CallOptions).DeleteAnnotatedDataset)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1066,6 +1077,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LabelImage[0:len((*c.CallOptions).LabelImage):len((*c.CallOptions).LabelImage)], opts...)
 	var resp *longrunningpb.Operation
@@ -1089,6 +1101,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LabelVideo[0:len((*c.CallOptions).LabelVideo):len((*c.CallOptions).LabelVideo)], opts...)
 	var resp *longrunningpb.Operation
@@ -1112,6 +1125,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LabelText[0:len((*c.CallOptions).LabelText):len((*c.CallOptions).LabelText)], opts...)
 	var resp *longrunningpb.Operation
@@ -1135,6 +1149,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetExample[0:len((*c.CallOptions).GetExample):len((*c.CallOptions).GetExample)], opts...)
 	var resp *datalabelingpb.Example
@@ -1151,6 +1166,7 @@
 
 func (c *gRPCClient) ListExamples(ctx context.Context, req *datalabelingpb.ListExamplesRequest, opts ...gax.CallOption) *ExampleIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListExamples[0:len((*c.CallOptions).ListExamples):len((*c.CallOptions).ListExamples)], opts...)
 	it := &ExampleIterator{}
@@ -1200,6 +1216,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAnnotationSpecSet[0:len((*c.CallOptions).CreateAnnotationSpecSet):len((*c.CallOptions).CreateAnnotationSpecSet)], opts...)
 	var resp *datalabelingpb.AnnotationSpecSet
@@ -1221,6 +1238,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAnnotationSpecSet[0:len((*c.CallOptions).GetAnnotationSpecSet):len((*c.CallOptions).GetAnnotationSpecSet)], opts...)
 	var resp *datalabelingpb.AnnotationSpecSet
@@ -1237,6 +1255,7 @@
 
 func (c *gRPCClient) ListAnnotationSpecSets(ctx context.Context, req *datalabelingpb.ListAnnotationSpecSetsRequest, opts ...gax.CallOption) *AnnotationSpecSetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAnnotationSpecSets[0:len((*c.CallOptions).ListAnnotationSpecSets):len((*c.CallOptions).ListAnnotationSpecSets)], opts...)
 	it := &AnnotationSpecSetIterator{}
@@ -1286,6 +1305,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAnnotationSpecSet[0:len((*c.CallOptions).DeleteAnnotationSpecSet):len((*c.CallOptions).DeleteAnnotationSpecSet)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1303,6 +1323,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateInstruction[0:len((*c.CallOptions).CreateInstruction):len((*c.CallOptions).CreateInstruction)], opts...)
 	var resp *longrunningpb.Operation
@@ -1326,6 +1347,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstruction[0:len((*c.CallOptions).GetInstruction):len((*c.CallOptions).GetInstruction)], opts...)
 	var resp *datalabelingpb.Instruction
@@ -1342,6 +1364,7 @@
 
 func (c *gRPCClient) ListInstructions(ctx context.Context, req *datalabelingpb.ListInstructionsRequest, opts ...gax.CallOption) *InstructionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInstructions[0:len((*c.CallOptions).ListInstructions):len((*c.CallOptions).ListInstructions)], opts...)
 	it := &InstructionIterator{}
@@ -1391,6 +1414,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteInstruction[0:len((*c.CallOptions).DeleteInstruction):len((*c.CallOptions).DeleteInstruction)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1408,6 +1432,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEvaluation[0:len((*c.CallOptions).GetEvaluation):len((*c.CallOptions).GetEvaluation)], opts...)
 	var resp *datalabelingpb.Evaluation
@@ -1424,6 +1449,7 @@
 
 func (c *gRPCClient) SearchEvaluations(ctx context.Context, req *datalabelingpb.SearchEvaluationsRequest, opts ...gax.CallOption) *EvaluationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchEvaluations[0:len((*c.CallOptions).SearchEvaluations):len((*c.CallOptions).SearchEvaluations)], opts...)
 	it := &EvaluationIterator{}
@@ -1468,6 +1494,7 @@
 
 func (c *gRPCClient) SearchExampleComparisons(ctx context.Context, req *datalabelingpb.SearchExampleComparisonsRequest, opts ...gax.CallOption) *SearchExampleComparisonsResponse_ExampleComparisonIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchExampleComparisons[0:len((*c.CallOptions).SearchExampleComparisons):len((*c.CallOptions).SearchExampleComparisons)], opts...)
 	it := &SearchExampleComparisonsResponse_ExampleComparisonIterator{}
@@ -1517,6 +1544,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEvaluationJob[0:len((*c.CallOptions).CreateEvaluationJob):len((*c.CallOptions).CreateEvaluationJob)], opts...)
 	var resp *datalabelingpb.EvaluationJob
@@ -1538,6 +1566,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "evaluation_job.name", url.QueryEscape(req.GetEvaluationJob().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEvaluationJob[0:len((*c.CallOptions).UpdateEvaluationJob):len((*c.CallOptions).UpdateEvaluationJob)], opts...)
 	var resp *datalabelingpb.EvaluationJob
@@ -1559,6 +1588,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEvaluationJob[0:len((*c.CallOptions).GetEvaluationJob):len((*c.CallOptions).GetEvaluationJob)], opts...)
 	var resp *datalabelingpb.EvaluationJob
@@ -1580,6 +1610,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PauseEvaluationJob[0:len((*c.CallOptions).PauseEvaluationJob):len((*c.CallOptions).PauseEvaluationJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1597,6 +1628,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResumeEvaluationJob[0:len((*c.CallOptions).ResumeEvaluationJob):len((*c.CallOptions).ResumeEvaluationJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1614,6 +1646,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEvaluationJob[0:len((*c.CallOptions).DeleteEvaluationJob):len((*c.CallOptions).DeleteEvaluationJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1626,6 +1659,7 @@
 
 func (c *gRPCClient) ListEvaluationJobs(ctx context.Context, req *datalabelingpb.ListEvaluationJobsRequest, opts ...gax.CallOption) *EvaluationJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEvaluationJobs[0:len((*c.CallOptions).ListEvaluationJobs):len((*c.CallOptions).ListEvaluationJobs)], opts...)
 	it := &EvaluationJobIterator{}
diff --git a/datalabeling/apiv1beta1/doc.go b/datalabeling/apiv1beta1/doc.go
index 086f18e..25b40c7 100644
--- a/datalabeling/apiv1beta1/doc.go
+++ b/datalabeling/apiv1beta1/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/datalabeling/apiv1beta1/version.go b/datalabeling/apiv1beta1/version.go
new file mode 100644
index 0000000..cb81283
--- /dev/null
+++ b/datalabeling/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package datalabeling
+
+import "cloud.google.com/go/datalabeling/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/dataplex/apiv1/content_client.go b/dataplex/apiv1/content_client.go
index 17dfdd8..d8990b6 100644
--- a/dataplex/apiv1/content_client.go
+++ b/dataplex/apiv1/content_client.go
@@ -207,7 +207,7 @@
 // use by Google-written clients.
 func (c *contentGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -219,6 +219,7 @@
 
 func (c *contentGRPCClient) CreateContent(ctx context.Context, req *dataplexpb.CreateContentRequest, opts ...gax.CallOption) (*dataplexpb.Content, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateContent[0:len((*c.CallOptions).CreateContent):len((*c.CallOptions).CreateContent)], opts...)
 	var resp *dataplexpb.Content
@@ -235,6 +236,7 @@
 
 func (c *contentGRPCClient) UpdateContent(ctx context.Context, req *dataplexpb.UpdateContentRequest, opts ...gax.CallOption) (*dataplexpb.Content, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "content.name", url.QueryEscape(req.GetContent().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateContent[0:len((*c.CallOptions).UpdateContent):len((*c.CallOptions).UpdateContent)], opts...)
 	var resp *dataplexpb.Content
@@ -251,6 +253,7 @@
 
 func (c *contentGRPCClient) DeleteContent(ctx context.Context, req *dataplexpb.DeleteContentRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteContent[0:len((*c.CallOptions).DeleteContent):len((*c.CallOptions).DeleteContent)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -263,6 +266,7 @@
 
 func (c *contentGRPCClient) GetContent(ctx context.Context, req *dataplexpb.GetContentRequest, opts ...gax.CallOption) (*dataplexpb.Content, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetContent[0:len((*c.CallOptions).GetContent):len((*c.CallOptions).GetContent)], opts...)
 	var resp *dataplexpb.Content
@@ -279,6 +283,7 @@
 
 func (c *contentGRPCClient) ListContent(ctx context.Context, req *dataplexpb.ListContentRequest, opts ...gax.CallOption) *ContentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListContent[0:len((*c.CallOptions).ListContent):len((*c.CallOptions).ListContent)], opts...)
 	it := &ContentIterator{}
diff --git a/dataplex/apiv1/dataplex_client.go b/dataplex/apiv1/dataplex_client.go
index aa1b643..7cb8988 100644
--- a/dataplex/apiv1/dataplex_client.go
+++ b/dataplex/apiv1/dataplex_client.go
@@ -696,7 +696,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -713,6 +713,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateLake[0:len((*c.CallOptions).CreateLake):len((*c.CallOptions).CreateLake)], opts...)
 	var resp *longrunningpb.Operation
@@ -736,6 +737,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "lake.name", url.QueryEscape(req.GetLake().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateLake[0:len((*c.CallOptions).UpdateLake):len((*c.CallOptions).UpdateLake)], opts...)
 	var resp *longrunningpb.Operation
@@ -759,6 +761,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteLake[0:len((*c.CallOptions).DeleteLake):len((*c.CallOptions).DeleteLake)], opts...)
 	var resp *longrunningpb.Operation
@@ -777,6 +780,7 @@
 
 func (c *gRPCClient) ListLakes(ctx context.Context, req *dataplexpb.ListLakesRequest, opts ...gax.CallOption) *LakeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListLakes[0:len((*c.CallOptions).ListLakes):len((*c.CallOptions).ListLakes)], opts...)
 	it := &LakeIterator{}
@@ -826,6 +830,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetLake[0:len((*c.CallOptions).GetLake):len((*c.CallOptions).GetLake)], opts...)
 	var resp *dataplexpb.Lake
@@ -842,6 +847,7 @@
 
 func (c *gRPCClient) ListLakeActions(ctx context.Context, req *dataplexpb.ListLakeActionsRequest, opts ...gax.CallOption) *ActionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListLakeActions[0:len((*c.CallOptions).ListLakeActions):len((*c.CallOptions).ListLakeActions)], opts...)
 	it := &ActionIterator{}
@@ -891,6 +897,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateZone[0:len((*c.CallOptions).CreateZone):len((*c.CallOptions).CreateZone)], opts...)
 	var resp *longrunningpb.Operation
@@ -914,6 +921,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "zone.name", url.QueryEscape(req.GetZone().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateZone[0:len((*c.CallOptions).UpdateZone):len((*c.CallOptions).UpdateZone)], opts...)
 	var resp *longrunningpb.Operation
@@ -937,6 +945,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteZone[0:len((*c.CallOptions).DeleteZone):len((*c.CallOptions).DeleteZone)], opts...)
 	var resp *longrunningpb.Operation
@@ -955,6 +964,7 @@
 
 func (c *gRPCClient) ListZones(ctx context.Context, req *dataplexpb.ListZonesRequest, opts ...gax.CallOption) *ZoneIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListZones[0:len((*c.CallOptions).ListZones):len((*c.CallOptions).ListZones)], opts...)
 	it := &ZoneIterator{}
@@ -1004,6 +1014,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetZone[0:len((*c.CallOptions).GetZone):len((*c.CallOptions).GetZone)], opts...)
 	var resp *dataplexpb.Zone
@@ -1020,6 +1031,7 @@
 
 func (c *gRPCClient) ListZoneActions(ctx context.Context, req *dataplexpb.ListZoneActionsRequest, opts ...gax.CallOption) *ActionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListZoneActions[0:len((*c.CallOptions).ListZoneActions):len((*c.CallOptions).ListZoneActions)], opts...)
 	it := &ActionIterator{}
@@ -1069,6 +1081,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAsset[0:len((*c.CallOptions).CreateAsset):len((*c.CallOptions).CreateAsset)], opts...)
 	var resp *longrunningpb.Operation
@@ -1092,6 +1105,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "asset.name", url.QueryEscape(req.GetAsset().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAsset[0:len((*c.CallOptions).UpdateAsset):len((*c.CallOptions).UpdateAsset)], opts...)
 	var resp *longrunningpb.Operation
@@ -1115,6 +1129,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAsset[0:len((*c.CallOptions).DeleteAsset):len((*c.CallOptions).DeleteAsset)], opts...)
 	var resp *longrunningpb.Operation
@@ -1133,6 +1148,7 @@
 
 func (c *gRPCClient) ListAssets(ctx context.Context, req *dataplexpb.ListAssetsRequest, opts ...gax.CallOption) *AssetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAssets[0:len((*c.CallOptions).ListAssets):len((*c.CallOptions).ListAssets)], opts...)
 	it := &AssetIterator{}
@@ -1182,6 +1198,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAsset[0:len((*c.CallOptions).GetAsset):len((*c.CallOptions).GetAsset)], opts...)
 	var resp *dataplexpb.Asset
@@ -1198,6 +1215,7 @@
 
 func (c *gRPCClient) ListAssetActions(ctx context.Context, req *dataplexpb.ListAssetActionsRequest, opts ...gax.CallOption) *ActionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAssetActions[0:len((*c.CallOptions).ListAssetActions):len((*c.CallOptions).ListAssetActions)], opts...)
 	it := &ActionIterator{}
@@ -1247,6 +1265,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTask[0:len((*c.CallOptions).CreateTask):len((*c.CallOptions).CreateTask)], opts...)
 	var resp *longrunningpb.Operation
@@ -1270,6 +1289,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "task.name", url.QueryEscape(req.GetTask().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTask[0:len((*c.CallOptions).UpdateTask):len((*c.CallOptions).UpdateTask)], opts...)
 	var resp *longrunningpb.Operation
@@ -1293,6 +1313,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTask[0:len((*c.CallOptions).DeleteTask):len((*c.CallOptions).DeleteTask)], opts...)
 	var resp *longrunningpb.Operation
@@ -1311,6 +1332,7 @@
 
 func (c *gRPCClient) ListTasks(ctx context.Context, req *dataplexpb.ListTasksRequest, opts ...gax.CallOption) *TaskIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTasks[0:len((*c.CallOptions).ListTasks):len((*c.CallOptions).ListTasks)], opts...)
 	it := &TaskIterator{}
@@ -1360,6 +1382,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTask[0:len((*c.CallOptions).GetTask):len((*c.CallOptions).GetTask)], opts...)
 	var resp *dataplexpb.Task
@@ -1376,6 +1399,7 @@
 
 func (c *gRPCClient) ListJobs(ctx context.Context, req *dataplexpb.ListJobsRequest, opts ...gax.CallOption) *JobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListJobs[0:len((*c.CallOptions).ListJobs):len((*c.CallOptions).ListJobs)], opts...)
 	it := &JobIterator{}
@@ -1425,6 +1449,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJob[0:len((*c.CallOptions).GetJob):len((*c.CallOptions).GetJob)], opts...)
 	var resp *dataplexpb.Job
@@ -1446,6 +1471,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelJob[0:len((*c.CallOptions).CancelJob):len((*c.CallOptions).CancelJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1458,6 +1484,7 @@
 
 func (c *gRPCClient) CreateEnvironment(ctx context.Context, req *dataplexpb.CreateEnvironmentRequest, opts ...gax.CallOption) (*CreateEnvironmentOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEnvironment[0:len((*c.CallOptions).CreateEnvironment):len((*c.CallOptions).CreateEnvironment)], opts...)
 	var resp *longrunningpb.Operation
@@ -1476,6 +1503,7 @@
 
 func (c *gRPCClient) UpdateEnvironment(ctx context.Context, req *dataplexpb.UpdateEnvironmentRequest, opts ...gax.CallOption) (*UpdateEnvironmentOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "environment.name", url.QueryEscape(req.GetEnvironment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEnvironment[0:len((*c.CallOptions).UpdateEnvironment):len((*c.CallOptions).UpdateEnvironment)], opts...)
 	var resp *longrunningpb.Operation
@@ -1494,6 +1522,7 @@
 
 func (c *gRPCClient) DeleteEnvironment(ctx context.Context, req *dataplexpb.DeleteEnvironmentRequest, opts ...gax.CallOption) (*DeleteEnvironmentOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEnvironment[0:len((*c.CallOptions).DeleteEnvironment):len((*c.CallOptions).DeleteEnvironment)], opts...)
 	var resp *longrunningpb.Operation
@@ -1512,6 +1541,7 @@
 
 func (c *gRPCClient) ListEnvironments(ctx context.Context, req *dataplexpb.ListEnvironmentsRequest, opts ...gax.CallOption) *EnvironmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEnvironments[0:len((*c.CallOptions).ListEnvironments):len((*c.CallOptions).ListEnvironments)], opts...)
 	it := &EnvironmentIterator{}
@@ -1556,6 +1586,7 @@
 
 func (c *gRPCClient) GetEnvironment(ctx context.Context, req *dataplexpb.GetEnvironmentRequest, opts ...gax.CallOption) (*dataplexpb.Environment, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEnvironment[0:len((*c.CallOptions).GetEnvironment):len((*c.CallOptions).GetEnvironment)], opts...)
 	var resp *dataplexpb.Environment
@@ -1572,6 +1603,7 @@
 
 func (c *gRPCClient) ListSessions(ctx context.Context, req *dataplexpb.ListSessionsRequest, opts ...gax.CallOption) *SessionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSessions[0:len((*c.CallOptions).ListSessions):len((*c.CallOptions).ListSessions)], opts...)
 	it := &SessionIterator{}
diff --git a/dataplex/apiv1/doc.go b/dataplex/apiv1/doc.go
index 0d71a1d..5419628 100644
--- a/dataplex/apiv1/doc.go
+++ b/dataplex/apiv1/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dataplex/apiv1/metadata_client.go b/dataplex/apiv1/metadata_client.go
index aa35dbe..a590771 100644
--- a/dataplex/apiv1/metadata_client.go
+++ b/dataplex/apiv1/metadata_client.go
@@ -283,7 +283,7 @@
 // use by Google-written clients.
 func (c *metadataGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -300,6 +300,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEntity[0:len((*c.CallOptions).CreateEntity):len((*c.CallOptions).CreateEntity)], opts...)
 	var resp *dataplexpb.Entity
@@ -321,6 +322,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entity.name", url.QueryEscape(req.GetEntity().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEntity[0:len((*c.CallOptions).UpdateEntity):len((*c.CallOptions).UpdateEntity)], opts...)
 	var resp *dataplexpb.Entity
@@ -342,6 +344,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEntity[0:len((*c.CallOptions).DeleteEntity):len((*c.CallOptions).DeleteEntity)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -359,6 +362,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEntity[0:len((*c.CallOptions).GetEntity):len((*c.CallOptions).GetEntity)], opts...)
 	var resp *dataplexpb.Entity
@@ -375,6 +379,7 @@
 
 func (c *metadataGRPCClient) ListEntities(ctx context.Context, req *dataplexpb.ListEntitiesRequest, opts ...gax.CallOption) *EntityIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEntities[0:len((*c.CallOptions).ListEntities):len((*c.CallOptions).ListEntities)], opts...)
 	it := &EntityIterator{}
@@ -424,6 +429,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreatePartition[0:len((*c.CallOptions).CreatePartition):len((*c.CallOptions).CreatePartition)], opts...)
 	var resp *dataplexpb.Partition
@@ -445,6 +451,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePartition[0:len((*c.CallOptions).DeletePartition):len((*c.CallOptions).DeletePartition)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -462,6 +469,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPartition[0:len((*c.CallOptions).GetPartition):len((*c.CallOptions).GetPartition)], opts...)
 	var resp *dataplexpb.Partition
@@ -478,6 +486,7 @@
 
 func (c *metadataGRPCClient) ListPartitions(ctx context.Context, req *dataplexpb.ListPartitionsRequest, opts ...gax.CallOption) *PartitionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPartitions[0:len((*c.CallOptions).ListPartitions):len((*c.CallOptions).ListPartitions)], opts...)
 	it := &PartitionIterator{}
diff --git a/dataplex/apiv1/version.go b/dataplex/apiv1/version.go
new file mode 100644
index 0000000..64c14ad
--- /dev/null
+++ b/dataplex/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package dataplex
+
+import "cloud.google.com/go/dataplex/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/dataproc/apiv1/autoscaling_policy_client.go b/dataproc/apiv1/autoscaling_policy_client.go
index a63b50a..0925fc4 100644
--- a/dataproc/apiv1/autoscaling_policy_client.go
+++ b/dataproc/apiv1/autoscaling_policy_client.go
@@ -248,7 +248,7 @@
 // use by Google-written clients.
 func (c *autoscalingPolicyGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -265,6 +265,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAutoscalingPolicy[0:len((*c.CallOptions).CreateAutoscalingPolicy):len((*c.CallOptions).CreateAutoscalingPolicy)], opts...)
 	var resp *dataprocpb.AutoscalingPolicy
@@ -286,6 +287,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "policy.name", url.QueryEscape(req.GetPolicy().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAutoscalingPolicy[0:len((*c.CallOptions).UpdateAutoscalingPolicy):len((*c.CallOptions).UpdateAutoscalingPolicy)], opts...)
 	var resp *dataprocpb.AutoscalingPolicy
@@ -307,6 +309,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAutoscalingPolicy[0:len((*c.CallOptions).GetAutoscalingPolicy):len((*c.CallOptions).GetAutoscalingPolicy)], opts...)
 	var resp *dataprocpb.AutoscalingPolicy
@@ -323,6 +326,7 @@
 
 func (c *autoscalingPolicyGRPCClient) ListAutoscalingPolicies(ctx context.Context, req *dataprocpb.ListAutoscalingPoliciesRequest, opts ...gax.CallOption) *AutoscalingPolicyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAutoscalingPolicies[0:len((*c.CallOptions).ListAutoscalingPolicies):len((*c.CallOptions).ListAutoscalingPolicies)], opts...)
 	it := &AutoscalingPolicyIterator{}
@@ -372,6 +376,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAutoscalingPolicy[0:len((*c.CallOptions).DeleteAutoscalingPolicy):len((*c.CallOptions).DeleteAutoscalingPolicy)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dataproc/apiv1/batch_controller_client.go b/dataproc/apiv1/batch_controller_client.go
index bf8b5a0..d0c5c85 100644
--- a/dataproc/apiv1/batch_controller_client.go
+++ b/dataproc/apiv1/batch_controller_client.go
@@ -232,7 +232,7 @@
 // use by Google-written clients.
 func (c *batchControllerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -244,6 +244,7 @@
 
 func (c *batchControllerGRPCClient) CreateBatch(ctx context.Context, req *dataprocpb.CreateBatchRequest, opts ...gax.CallOption) (*CreateBatchOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBatch[0:len((*c.CallOptions).CreateBatch):len((*c.CallOptions).CreateBatch)], opts...)
 	var resp *longrunningpb.Operation
@@ -262,6 +263,7 @@
 
 func (c *batchControllerGRPCClient) GetBatch(ctx context.Context, req *dataprocpb.GetBatchRequest, opts ...gax.CallOption) (*dataprocpb.Batch, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBatch[0:len((*c.CallOptions).GetBatch):len((*c.CallOptions).GetBatch)], opts...)
 	var resp *dataprocpb.Batch
@@ -278,6 +280,7 @@
 
 func (c *batchControllerGRPCClient) ListBatches(ctx context.Context, req *dataprocpb.ListBatchesRequest, opts ...gax.CallOption) *BatchIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBatches[0:len((*c.CallOptions).ListBatches):len((*c.CallOptions).ListBatches)], opts...)
 	it := &BatchIterator{}
@@ -322,6 +325,7 @@
 
 func (c *batchControllerGRPCClient) DeleteBatch(ctx context.Context, req *dataprocpb.DeleteBatchRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteBatch[0:len((*c.CallOptions).DeleteBatch):len((*c.CallOptions).DeleteBatch)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dataproc/apiv1/cluster_controller_client.go b/dataproc/apiv1/cluster_controller_client.go
index 39f04df..e020275 100644
--- a/dataproc/apiv1/cluster_controller_client.go
+++ b/dataproc/apiv1/cluster_controller_client.go
@@ -379,7 +379,7 @@
 // use by Google-written clients.
 func (c *clusterControllerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -396,6 +396,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCluster[0:len((*c.CallOptions).CreateCluster):len((*c.CallOptions).CreateCluster)], opts...)
 	var resp *longrunningpb.Operation
@@ -419,6 +420,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion()), "cluster_name", url.QueryEscape(req.GetClusterName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCluster[0:len((*c.CallOptions).UpdateCluster):len((*c.CallOptions).UpdateCluster)], opts...)
 	var resp *longrunningpb.Operation
@@ -437,6 +439,7 @@
 
 func (c *clusterControllerGRPCClient) StopCluster(ctx context.Context, req *dataprocpb.StopClusterRequest, opts ...gax.CallOption) (*StopClusterOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion()), "cluster_name", url.QueryEscape(req.GetClusterName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StopCluster[0:len((*c.CallOptions).StopCluster):len((*c.CallOptions).StopCluster)], opts...)
 	var resp *longrunningpb.Operation
@@ -455,6 +458,7 @@
 
 func (c *clusterControllerGRPCClient) StartCluster(ctx context.Context, req *dataprocpb.StartClusterRequest, opts ...gax.CallOption) (*StartClusterOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion()), "cluster_name", url.QueryEscape(req.GetClusterName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartCluster[0:len((*c.CallOptions).StartCluster):len((*c.CallOptions).StartCluster)], opts...)
 	var resp *longrunningpb.Operation
@@ -478,6 +482,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion()), "cluster_name", url.QueryEscape(req.GetClusterName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteCluster[0:len((*c.CallOptions).DeleteCluster):len((*c.CallOptions).DeleteCluster)], opts...)
 	var resp *longrunningpb.Operation
@@ -501,6 +506,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion()), "cluster_name", url.QueryEscape(req.GetClusterName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCluster[0:len((*c.CallOptions).GetCluster):len((*c.CallOptions).GetCluster)], opts...)
 	var resp *dataprocpb.Cluster
@@ -517,6 +523,7 @@
 
 func (c *clusterControllerGRPCClient) ListClusters(ctx context.Context, req *dataprocpb.ListClustersRequest, opts ...gax.CallOption) *ClusterIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListClusters[0:len((*c.CallOptions).ListClusters):len((*c.CallOptions).ListClusters)], opts...)
 	it := &ClusterIterator{}
@@ -566,6 +573,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion()), "cluster_name", url.QueryEscape(req.GetClusterName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DiagnoseCluster[0:len((*c.CallOptions).DiagnoseCluster):len((*c.CallOptions).DiagnoseCluster)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/dataproc/apiv1/doc.go b/dataproc/apiv1/doc.go
index b2e2f06..720f8e1 100644
--- a/dataproc/apiv1/doc.go
+++ b/dataproc/apiv1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dataproc/apiv1/job_controller_client.go b/dataproc/apiv1/job_controller_client.go
index 2e98366..be436b4 100644
--- a/dataproc/apiv1/job_controller_client.go
+++ b/dataproc/apiv1/job_controller_client.go
@@ -337,7 +337,7 @@
 // use by Google-written clients.
 func (c *jobControllerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -354,6 +354,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SubmitJob[0:len((*c.CallOptions).SubmitJob):len((*c.CallOptions).SubmitJob)], opts...)
 	var resp *dataprocpb.Job
@@ -375,6 +376,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SubmitJobAsOperation[0:len((*c.CallOptions).SubmitJobAsOperation):len((*c.CallOptions).SubmitJobAsOperation)], opts...)
 	var resp *longrunningpb.Operation
@@ -398,6 +400,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion()), "job_id", url.QueryEscape(req.GetJobId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJob[0:len((*c.CallOptions).GetJob):len((*c.CallOptions).GetJob)], opts...)
 	var resp *dataprocpb.Job
@@ -414,6 +417,7 @@
 
 func (c *jobControllerGRPCClient) ListJobs(ctx context.Context, req *dataprocpb.ListJobsRequest, opts ...gax.CallOption) *JobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListJobs[0:len((*c.CallOptions).ListJobs):len((*c.CallOptions).ListJobs)], opts...)
 	it := &JobIterator{}
@@ -463,6 +467,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion()), "job_id", url.QueryEscape(req.GetJobId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateJob[0:len((*c.CallOptions).UpdateJob):len((*c.CallOptions).UpdateJob)], opts...)
 	var resp *dataprocpb.Job
@@ -484,6 +489,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion()), "job_id", url.QueryEscape(req.GetJobId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelJob[0:len((*c.CallOptions).CancelJob):len((*c.CallOptions).CancelJob)], opts...)
 	var resp *dataprocpb.Job
@@ -505,6 +511,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "region", url.QueryEscape(req.GetRegion()), "job_id", url.QueryEscape(req.GetJobId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteJob[0:len((*c.CallOptions).DeleteJob):len((*c.CallOptions).DeleteJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dataproc/apiv1/version.go b/dataproc/apiv1/version.go
new file mode 100644
index 0000000..186d727
--- /dev/null
+++ b/dataproc/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package dataproc
+
+import "cloud.google.com/go/dataproc/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/dataproc/apiv1/workflow_template_client.go b/dataproc/apiv1/workflow_template_client.go
index ddfcc6c..0b97be5 100644
--- a/dataproc/apiv1/workflow_template_client.go
+++ b/dataproc/apiv1/workflow_template_client.go
@@ -385,7 +385,7 @@
 // use by Google-written clients.
 func (c *workflowTemplateGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -402,6 +402,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateWorkflowTemplate[0:len((*c.CallOptions).CreateWorkflowTemplate):len((*c.CallOptions).CreateWorkflowTemplate)], opts...)
 	var resp *dataprocpb.WorkflowTemplate
@@ -423,6 +424,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetWorkflowTemplate[0:len((*c.CallOptions).GetWorkflowTemplate):len((*c.CallOptions).GetWorkflowTemplate)], opts...)
 	var resp *dataprocpb.WorkflowTemplate
@@ -444,6 +446,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).InstantiateWorkflowTemplate[0:len((*c.CallOptions).InstantiateWorkflowTemplate):len((*c.CallOptions).InstantiateWorkflowTemplate)], opts...)
 	var resp *longrunningpb.Operation
@@ -467,6 +470,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).InstantiateInlineWorkflowTemplate[0:len((*c.CallOptions).InstantiateInlineWorkflowTemplate):len((*c.CallOptions).InstantiateInlineWorkflowTemplate)], opts...)
 	var resp *longrunningpb.Operation
@@ -490,6 +494,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "template.name", url.QueryEscape(req.GetTemplate().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateWorkflowTemplate[0:len((*c.CallOptions).UpdateWorkflowTemplate):len((*c.CallOptions).UpdateWorkflowTemplate)], opts...)
 	var resp *dataprocpb.WorkflowTemplate
@@ -506,6 +511,7 @@
 
 func (c *workflowTemplateGRPCClient) ListWorkflowTemplates(ctx context.Context, req *dataprocpb.ListWorkflowTemplatesRequest, opts ...gax.CallOption) *WorkflowTemplateIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListWorkflowTemplates[0:len((*c.CallOptions).ListWorkflowTemplates):len((*c.CallOptions).ListWorkflowTemplates)], opts...)
 	it := &WorkflowTemplateIterator{}
@@ -555,6 +561,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteWorkflowTemplate[0:len((*c.CallOptions).DeleteWorkflowTemplate):len((*c.CallOptions).DeleteWorkflowTemplate)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dataqna/apiv1alpha/auto_suggestion_client.go b/dataqna/apiv1alpha/auto_suggestion_client.go
index 88ea5fe..9996e36 100644
--- a/dataqna/apiv1alpha/auto_suggestion_client.go
+++ b/dataqna/apiv1alpha/auto_suggestion_client.go
@@ -203,7 +203,7 @@
 // use by Google-written clients.
 func (c *autoSuggestionGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -220,6 +220,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SuggestQueries[0:len((*c.CallOptions).SuggestQueries):len((*c.CallOptions).SuggestQueries)], opts...)
 	var resp *dataqnapb.SuggestQueriesResponse
diff --git a/dataqna/apiv1alpha/doc.go b/dataqna/apiv1alpha/doc.go
index d0f29a8..9cba3c6 100644
--- a/dataqna/apiv1alpha/doc.go
+++ b/dataqna/apiv1alpha/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dataqna/apiv1alpha/question_client.go b/dataqna/apiv1alpha/question_client.go
index 4f3f037..3c04816 100644
--- a/dataqna/apiv1alpha/question_client.go
+++ b/dataqna/apiv1alpha/question_client.go
@@ -256,7 +256,7 @@
 // use by Google-written clients.
 func (c *questionGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -273,6 +273,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetQuestion[0:len((*c.CallOptions).GetQuestion):len((*c.CallOptions).GetQuestion)], opts...)
 	var resp *dataqnapb.Question
@@ -294,6 +295,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateQuestion[0:len((*c.CallOptions).CreateQuestion):len((*c.CallOptions).CreateQuestion)], opts...)
 	var resp *dataqnapb.Question
@@ -315,6 +317,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExecuteQuestion[0:len((*c.CallOptions).ExecuteQuestion):len((*c.CallOptions).ExecuteQuestion)], opts...)
 	var resp *dataqnapb.Question
@@ -336,6 +339,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetUserFeedback[0:len((*c.CallOptions).GetUserFeedback):len((*c.CallOptions).GetUserFeedback)], opts...)
 	var resp *dataqnapb.UserFeedback
@@ -357,6 +361,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "user_feedback.name", url.QueryEscape(req.GetUserFeedback().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateUserFeedback[0:len((*c.CallOptions).UpdateUserFeedback):len((*c.CallOptions).UpdateUserFeedback)], opts...)
 	var resp *dataqnapb.UserFeedback
diff --git a/dataqna/apiv1alpha/version.go b/dataqna/apiv1alpha/version.go
new file mode 100644
index 0000000..ed609da
--- /dev/null
+++ b/dataqna/apiv1alpha/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package dataqna
+
+import "cloud.google.com/go/dataqna/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/datastore/admin/apiv1/datastore_admin_client.go b/datastore/admin/apiv1/datastore_admin_client.go
index 27cd62d..1cfdb0d 100644
--- a/datastore/admin/apiv1/datastore_admin_client.go
+++ b/datastore/admin/apiv1/datastore_admin_client.go
@@ -420,7 +420,7 @@
 // use by Google-written clients.
 func (c *datastoreAdminGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -437,6 +437,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportEntities[0:len((*c.CallOptions).ExportEntities):len((*c.CallOptions).ExportEntities)], opts...)
 	var resp *longrunningpb.Operation
@@ -460,6 +461,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportEntities[0:len((*c.CallOptions).ImportEntities):len((*c.CallOptions).ImportEntities)], opts...)
 	var resp *longrunningpb.Operation
@@ -483,6 +485,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateIndex[0:len((*c.CallOptions).CreateIndex):len((*c.CallOptions).CreateIndex)], opts...)
 	var resp *longrunningpb.Operation
@@ -506,6 +509,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "index_id", url.QueryEscape(req.GetIndexId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteIndex[0:len((*c.CallOptions).DeleteIndex):len((*c.CallOptions).DeleteIndex)], opts...)
 	var resp *longrunningpb.Operation
@@ -529,6 +533,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "index_id", url.QueryEscape(req.GetIndexId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIndex[0:len((*c.CallOptions).GetIndex):len((*c.CallOptions).GetIndex)], opts...)
 	var resp *adminpb.Index
@@ -545,6 +550,7 @@
 
 func (c *datastoreAdminGRPCClient) ListIndexes(ctx context.Context, req *adminpb.ListIndexesRequest, opts ...gax.CallOption) *IndexIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListIndexes[0:len((*c.CallOptions).ListIndexes):len((*c.CallOptions).ListIndexes)], opts...)
 	it := &IndexIterator{}
diff --git a/datastore/admin/apiv1/doc.go b/datastore/admin/apiv1/doc.go
index 4271156..d687f28 100644
--- a/datastore/admin/apiv1/doc.go
+++ b/datastore/admin/apiv1/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/datastore/admin/apiv1/version.go b/datastore/admin/apiv1/version.go
new file mode 100644
index 0000000..0b4275e
--- /dev/null
+++ b/datastore/admin/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package admin
+
+import "cloud.google.com/go/datastore/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/datastream/apiv1alpha1/datastream_client.go b/datastream/apiv1alpha1/datastream_client.go
index b00f6bb..a64f934 100644
--- a/datastream/apiv1alpha1/datastream_client.go
+++ b/datastream/apiv1alpha1/datastream_client.go
@@ -557,7 +557,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -569,6 +569,7 @@
 
 func (c *gRPCClient) ListConnectionProfiles(ctx context.Context, req *datastreampb.ListConnectionProfilesRequest, opts ...gax.CallOption) *ConnectionProfileIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListConnectionProfiles[0:len((*c.CallOptions).ListConnectionProfiles):len((*c.CallOptions).ListConnectionProfiles)], opts...)
 	it := &ConnectionProfileIterator{}
@@ -618,6 +619,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetConnectionProfile[0:len((*c.CallOptions).GetConnectionProfile):len((*c.CallOptions).GetConnectionProfile)], opts...)
 	var resp *datastreampb.ConnectionProfile
@@ -639,6 +641,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateConnectionProfile[0:len((*c.CallOptions).CreateConnectionProfile):len((*c.CallOptions).CreateConnectionProfile)], opts...)
 	var resp *longrunningpb.Operation
@@ -662,6 +665,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "connection_profile.name", url.QueryEscape(req.GetConnectionProfile().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateConnectionProfile[0:len((*c.CallOptions).UpdateConnectionProfile):len((*c.CallOptions).UpdateConnectionProfile)], opts...)
 	var resp *longrunningpb.Operation
@@ -685,6 +689,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteConnectionProfile[0:len((*c.CallOptions).DeleteConnectionProfile):len((*c.CallOptions).DeleteConnectionProfile)], opts...)
 	var resp *longrunningpb.Operation
@@ -708,6 +713,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DiscoverConnectionProfile[0:len((*c.CallOptions).DiscoverConnectionProfile):len((*c.CallOptions).DiscoverConnectionProfile)], opts...)
 	var resp *datastreampb.DiscoverConnectionProfileResponse
@@ -724,6 +730,7 @@
 
 func (c *gRPCClient) ListStreams(ctx context.Context, req *datastreampb.ListStreamsRequest, opts ...gax.CallOption) *StreamIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListStreams[0:len((*c.CallOptions).ListStreams):len((*c.CallOptions).ListStreams)], opts...)
 	it := &StreamIterator{}
@@ -773,6 +780,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetStream[0:len((*c.CallOptions).GetStream):len((*c.CallOptions).GetStream)], opts...)
 	var resp *datastreampb.Stream
@@ -794,6 +802,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateStream[0:len((*c.CallOptions).CreateStream):len((*c.CallOptions).CreateStream)], opts...)
 	var resp *longrunningpb.Operation
@@ -817,6 +826,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "stream.name", url.QueryEscape(req.GetStream().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateStream[0:len((*c.CallOptions).UpdateStream):len((*c.CallOptions).UpdateStream)], opts...)
 	var resp *longrunningpb.Operation
@@ -840,6 +850,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteStream[0:len((*c.CallOptions).DeleteStream):len((*c.CallOptions).DeleteStream)], opts...)
 	var resp *longrunningpb.Operation
@@ -863,6 +874,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "stream", url.QueryEscape(req.GetStream())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FetchErrors[0:len((*c.CallOptions).FetchErrors):len((*c.CallOptions).FetchErrors)], opts...)
 	var resp *longrunningpb.Operation
@@ -881,6 +893,7 @@
 
 func (c *gRPCClient) FetchStaticIps(ctx context.Context, req *datastreampb.FetchStaticIpsRequest, opts ...gax.CallOption) *StringIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FetchStaticIps[0:len((*c.CallOptions).FetchStaticIps):len((*c.CallOptions).FetchStaticIps)], opts...)
 	it := &StringIterator{}
@@ -930,6 +943,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreatePrivateConnection[0:len((*c.CallOptions).CreatePrivateConnection):len((*c.CallOptions).CreatePrivateConnection)], opts...)
 	var resp *longrunningpb.Operation
@@ -953,6 +967,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPrivateConnection[0:len((*c.CallOptions).GetPrivateConnection):len((*c.CallOptions).GetPrivateConnection)], opts...)
 	var resp *datastreampb.PrivateConnection
@@ -969,6 +984,7 @@
 
 func (c *gRPCClient) ListPrivateConnections(ctx context.Context, req *datastreampb.ListPrivateConnectionsRequest, opts ...gax.CallOption) *PrivateConnectionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPrivateConnections[0:len((*c.CallOptions).ListPrivateConnections):len((*c.CallOptions).ListPrivateConnections)], opts...)
 	it := &PrivateConnectionIterator{}
@@ -1018,6 +1034,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePrivateConnection[0:len((*c.CallOptions).DeletePrivateConnection):len((*c.CallOptions).DeletePrivateConnection)], opts...)
 	var resp *longrunningpb.Operation
@@ -1041,6 +1058,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateRoute[0:len((*c.CallOptions).CreateRoute):len((*c.CallOptions).CreateRoute)], opts...)
 	var resp *longrunningpb.Operation
@@ -1064,6 +1082,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetRoute[0:len((*c.CallOptions).GetRoute):len((*c.CallOptions).GetRoute)], opts...)
 	var resp *datastreampb.Route
@@ -1080,6 +1099,7 @@
 
 func (c *gRPCClient) ListRoutes(ctx context.Context, req *datastreampb.ListRoutesRequest, opts ...gax.CallOption) *RouteIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListRoutes[0:len((*c.CallOptions).ListRoutes):len((*c.CallOptions).ListRoutes)], opts...)
 	it := &RouteIterator{}
@@ -1129,6 +1149,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteRoute[0:len((*c.CallOptions).DeleteRoute):len((*c.CallOptions).DeleteRoute)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/datastream/apiv1alpha1/doc.go b/datastream/apiv1alpha1/doc.go
index d59dd21..67061c9 100644
--- a/datastream/apiv1alpha1/doc.go
+++ b/datastream/apiv1alpha1/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/datastream/apiv1alpha1/version.go b/datastream/apiv1alpha1/version.go
new file mode 100644
index 0000000..26929fc
--- /dev/null
+++ b/datastream/apiv1alpha1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package datastream
+
+import "cloud.google.com/go/datastream/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/deploy/apiv1/cloud_deploy_client.go b/deploy/apiv1/cloud_deploy_client.go
index e1b452d..b4c13da 100644
--- a/deploy/apiv1/cloud_deploy_client.go
+++ b/deploy/apiv1/cloud_deploy_client.go
@@ -485,7 +485,7 @@
 // use by Google-written clients.
 func (c *cloudDeployGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -497,6 +497,7 @@
 
 func (c *cloudDeployGRPCClient) ListDeliveryPipelines(ctx context.Context, req *deploypb.ListDeliveryPipelinesRequest, opts ...gax.CallOption) *DeliveryPipelineIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDeliveryPipelines[0:len((*c.CallOptions).ListDeliveryPipelines):len((*c.CallOptions).ListDeliveryPipelines)], opts...)
 	it := &DeliveryPipelineIterator{}
@@ -546,6 +547,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDeliveryPipeline[0:len((*c.CallOptions).GetDeliveryPipeline):len((*c.CallOptions).GetDeliveryPipeline)], opts...)
 	var resp *deploypb.DeliveryPipeline
@@ -567,6 +569,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDeliveryPipeline[0:len((*c.CallOptions).CreateDeliveryPipeline):len((*c.CallOptions).CreateDeliveryPipeline)], opts...)
 	var resp *longrunningpb.Operation
@@ -590,6 +593,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "delivery_pipeline.name", url.QueryEscape(req.GetDeliveryPipeline().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDeliveryPipeline[0:len((*c.CallOptions).UpdateDeliveryPipeline):len((*c.CallOptions).UpdateDeliveryPipeline)], opts...)
 	var resp *longrunningpb.Operation
@@ -613,6 +617,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDeliveryPipeline[0:len((*c.CallOptions).DeleteDeliveryPipeline):len((*c.CallOptions).DeleteDeliveryPipeline)], opts...)
 	var resp *longrunningpb.Operation
@@ -631,6 +636,7 @@
 
 func (c *cloudDeployGRPCClient) ListTargets(ctx context.Context, req *deploypb.ListTargetsRequest, opts ...gax.CallOption) *TargetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTargets[0:len((*c.CallOptions).ListTargets):len((*c.CallOptions).ListTargets)], opts...)
 	it := &TargetIterator{}
@@ -680,6 +686,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTarget[0:len((*c.CallOptions).GetTarget):len((*c.CallOptions).GetTarget)], opts...)
 	var resp *deploypb.Target
@@ -701,6 +708,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTarget[0:len((*c.CallOptions).CreateTarget):len((*c.CallOptions).CreateTarget)], opts...)
 	var resp *longrunningpb.Operation
@@ -724,6 +732,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "target.name", url.QueryEscape(req.GetTarget().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTarget[0:len((*c.CallOptions).UpdateTarget):len((*c.CallOptions).UpdateTarget)], opts...)
 	var resp *longrunningpb.Operation
@@ -747,6 +756,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTarget[0:len((*c.CallOptions).DeleteTarget):len((*c.CallOptions).DeleteTarget)], opts...)
 	var resp *longrunningpb.Operation
@@ -765,6 +775,7 @@
 
 func (c *cloudDeployGRPCClient) ListReleases(ctx context.Context, req *deploypb.ListReleasesRequest, opts ...gax.CallOption) *ReleaseIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListReleases[0:len((*c.CallOptions).ListReleases):len((*c.CallOptions).ListReleases)], opts...)
 	it := &ReleaseIterator{}
@@ -814,6 +825,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetRelease[0:len((*c.CallOptions).GetRelease):len((*c.CallOptions).GetRelease)], opts...)
 	var resp *deploypb.Release
@@ -835,6 +847,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateRelease[0:len((*c.CallOptions).CreateRelease):len((*c.CallOptions).CreateRelease)], opts...)
 	var resp *longrunningpb.Operation
@@ -858,6 +871,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ApproveRollout[0:len((*c.CallOptions).ApproveRollout):len((*c.CallOptions).ApproveRollout)], opts...)
 	var resp *deploypb.ApproveRolloutResponse
@@ -874,6 +888,7 @@
 
 func (c *cloudDeployGRPCClient) ListRollouts(ctx context.Context, req *deploypb.ListRolloutsRequest, opts ...gax.CallOption) *RolloutIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListRollouts[0:len((*c.CallOptions).ListRollouts):len((*c.CallOptions).ListRollouts)], opts...)
 	it := &RolloutIterator{}
@@ -923,6 +938,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetRollout[0:len((*c.CallOptions).GetRollout):len((*c.CallOptions).GetRollout)], opts...)
 	var resp *deploypb.Rollout
@@ -944,6 +960,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateRollout[0:len((*c.CallOptions).CreateRollout):len((*c.CallOptions).CreateRollout)], opts...)
 	var resp *longrunningpb.Operation
@@ -967,6 +984,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetConfig[0:len((*c.CallOptions).GetConfig):len((*c.CallOptions).GetConfig)], opts...)
 	var resp *deploypb.Config
diff --git a/deploy/apiv1/doc.go b/deploy/apiv1/doc.go
index b359c71..f366a6b 100644
--- a/deploy/apiv1/doc.go
+++ b/deploy/apiv1/doc.go
@@ -88,7 +88,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/deploy/apiv1/version.go b/deploy/apiv1/version.go
new file mode 100644
index 0000000..6a53a8e
--- /dev/null
+++ b/deploy/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package deploy
+
+import "cloud.google.com/go/deploy/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/dialogflow/apiv2/agents_client.go b/dialogflow/apiv2/agents_client.go
index 331f8fb..df546da 100644
--- a/dialogflow/apiv2/agents_client.go
+++ b/dialogflow/apiv2/agents_client.go
@@ -467,7 +467,7 @@
 // use by Google-written clients.
 func (c *agentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -484,6 +484,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAgent[0:len((*c.CallOptions).GetAgent):len((*c.CallOptions).GetAgent)], opts...)
 	var resp *dialogflowpb.Agent
@@ -505,6 +506,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "agent.parent", url.QueryEscape(req.GetAgent().GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetAgent[0:len((*c.CallOptions).SetAgent):len((*c.CallOptions).SetAgent)], opts...)
 	var resp *dialogflowpb.Agent
@@ -526,6 +528,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAgent[0:len((*c.CallOptions).DeleteAgent):len((*c.CallOptions).DeleteAgent)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -538,6 +541,7 @@
 
 func (c *agentsGRPCClient) SearchAgents(ctx context.Context, req *dialogflowpb.SearchAgentsRequest, opts ...gax.CallOption) *AgentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchAgents[0:len((*c.CallOptions).SearchAgents):len((*c.CallOptions).SearchAgents)], opts...)
 	it := &AgentIterator{}
@@ -587,6 +591,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TrainAgent[0:len((*c.CallOptions).TrainAgent):len((*c.CallOptions).TrainAgent)], opts...)
 	var resp *longrunningpb.Operation
@@ -610,6 +615,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportAgent[0:len((*c.CallOptions).ExportAgent):len((*c.CallOptions).ExportAgent)], opts...)
 	var resp *longrunningpb.Operation
@@ -633,6 +639,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportAgent[0:len((*c.CallOptions).ImportAgent):len((*c.CallOptions).ImportAgent)], opts...)
 	var resp *longrunningpb.Operation
@@ -656,6 +663,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RestoreAgent[0:len((*c.CallOptions).RestoreAgent):len((*c.CallOptions).RestoreAgent)], opts...)
 	var resp *longrunningpb.Operation
@@ -679,6 +687,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetValidationResult[0:len((*c.CallOptions).GetValidationResult):len((*c.CallOptions).GetValidationResult)], opts...)
 	var resp *dialogflowpb.ValidationResult
diff --git a/dialogflow/apiv2/answer_records_client.go b/dialogflow/apiv2/answer_records_client.go
index e0a2149..d3d7e2b 100644
--- a/dialogflow/apiv2/answer_records_client.go
+++ b/dialogflow/apiv2/answer_records_client.go
@@ -206,7 +206,7 @@
 // use by Google-written clients.
 func (c *answerRecordsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -218,6 +218,7 @@
 
 func (c *answerRecordsGRPCClient) ListAnswerRecords(ctx context.Context, req *dialogflowpb.ListAnswerRecordsRequest, opts ...gax.CallOption) *AnswerRecordIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAnswerRecords[0:len((*c.CallOptions).ListAnswerRecords):len((*c.CallOptions).ListAnswerRecords)], opts...)
 	it := &AnswerRecordIterator{}
@@ -267,6 +268,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "answer_record.name", url.QueryEscape(req.GetAnswerRecord().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAnswerRecord[0:len((*c.CallOptions).UpdateAnswerRecord):len((*c.CallOptions).UpdateAnswerRecord)], opts...)
 	var resp *dialogflowpb.AnswerRecord
diff --git a/dialogflow/apiv2/contexts_client.go b/dialogflow/apiv2/contexts_client.go
index f82a260..93fa8e3 100644
--- a/dialogflow/apiv2/contexts_client.go
+++ b/dialogflow/apiv2/contexts_client.go
@@ -279,7 +279,7 @@
 // use by Google-written clients.
 func (c *contextsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -291,6 +291,7 @@
 
 func (c *contextsGRPCClient) ListContexts(ctx context.Context, req *dialogflowpb.ListContextsRequest, opts ...gax.CallOption) *ContextIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListContexts[0:len((*c.CallOptions).ListContexts):len((*c.CallOptions).ListContexts)], opts...)
 	it := &ContextIterator{}
@@ -340,6 +341,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetContext[0:len((*c.CallOptions).GetContext):len((*c.CallOptions).GetContext)], opts...)
 	var resp *dialogflowpb.Context
@@ -361,6 +363,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateContext[0:len((*c.CallOptions).CreateContext):len((*c.CallOptions).CreateContext)], opts...)
 	var resp *dialogflowpb.Context
@@ -382,6 +385,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "context.name", url.QueryEscape(req.GetContext().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateContext[0:len((*c.CallOptions).UpdateContext):len((*c.CallOptions).UpdateContext)], opts...)
 	var resp *dialogflowpb.Context
@@ -403,6 +407,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteContext[0:len((*c.CallOptions).DeleteContext):len((*c.CallOptions).DeleteContext)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -420,6 +425,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAllContexts[0:len((*c.CallOptions).DeleteAllContexts):len((*c.CallOptions).DeleteAllContexts)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/apiv2/conversation_profiles_client.go b/dialogflow/apiv2/conversation_profiles_client.go
index 8cfea59..0614326 100644
--- a/dialogflow/apiv2/conversation_profiles_client.go
+++ b/dialogflow/apiv2/conversation_profiles_client.go
@@ -267,7 +267,7 @@
 // use by Google-written clients.
 func (c *conversationProfilesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -279,6 +279,7 @@
 
 func (c *conversationProfilesGRPCClient) ListConversationProfiles(ctx context.Context, req *dialogflowpb.ListConversationProfilesRequest, opts ...gax.CallOption) *ConversationProfileIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListConversationProfiles[0:len((*c.CallOptions).ListConversationProfiles):len((*c.CallOptions).ListConversationProfiles)], opts...)
 	it := &ConversationProfileIterator{}
@@ -328,6 +329,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetConversationProfile[0:len((*c.CallOptions).GetConversationProfile):len((*c.CallOptions).GetConversationProfile)], opts...)
 	var resp *dialogflowpb.ConversationProfile
@@ -349,6 +351,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateConversationProfile[0:len((*c.CallOptions).CreateConversationProfile):len((*c.CallOptions).CreateConversationProfile)], opts...)
 	var resp *dialogflowpb.ConversationProfile
@@ -370,6 +373,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "conversation_profile.name", url.QueryEscape(req.GetConversationProfile().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateConversationProfile[0:len((*c.CallOptions).UpdateConversationProfile):len((*c.CallOptions).UpdateConversationProfile)], opts...)
 	var resp *dialogflowpb.ConversationProfile
@@ -391,6 +395,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteConversationProfile[0:len((*c.CallOptions).DeleteConversationProfile):len((*c.CallOptions).DeleteConversationProfile)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/apiv2/conversations_client.go b/dialogflow/apiv2/conversations_client.go
index ccd5db8..3b556a9 100644
--- a/dialogflow/apiv2/conversations_client.go
+++ b/dialogflow/apiv2/conversations_client.go
@@ -280,7 +280,7 @@
 // use by Google-written clients.
 func (c *conversationsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -297,6 +297,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateConversation[0:len((*c.CallOptions).CreateConversation):len((*c.CallOptions).CreateConversation)], opts...)
 	var resp *dialogflowpb.Conversation
@@ -313,6 +314,7 @@
 
 func (c *conversationsGRPCClient) ListConversations(ctx context.Context, req *dialogflowpb.ListConversationsRequest, opts ...gax.CallOption) *ConversationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListConversations[0:len((*c.CallOptions).ListConversations):len((*c.CallOptions).ListConversations)], opts...)
 	it := &ConversationIterator{}
@@ -362,6 +364,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetConversation[0:len((*c.CallOptions).GetConversation):len((*c.CallOptions).GetConversation)], opts...)
 	var resp *dialogflowpb.Conversation
@@ -383,6 +386,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CompleteConversation[0:len((*c.CallOptions).CompleteConversation):len((*c.CallOptions).CompleteConversation)], opts...)
 	var resp *dialogflowpb.Conversation
@@ -399,6 +403,7 @@
 
 func (c *conversationsGRPCClient) ListMessages(ctx context.Context, req *dialogflowpb.ListMessagesRequest, opts ...gax.CallOption) *MessageIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMessages[0:len((*c.CallOptions).ListMessages):len((*c.CallOptions).ListMessages)], opts...)
 	it := &MessageIterator{}
diff --git a/dialogflow/apiv2/doc.go b/dialogflow/apiv2/doc.go
index b7807d1..f3f9d84 100644
--- a/dialogflow/apiv2/doc.go
+++ b/dialogflow/apiv2/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dialogflow/apiv2/documents_client.go b/dialogflow/apiv2/documents_client.go
index bd50f35..0aeb7f8 100644
--- a/dialogflow/apiv2/documents_client.go
+++ b/dialogflow/apiv2/documents_client.go
@@ -437,7 +437,7 @@
 // use by Google-written clients.
 func (c *documentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -449,6 +449,7 @@
 
 func (c *documentsGRPCClient) ListDocuments(ctx context.Context, req *dialogflowpb.ListDocumentsRequest, opts ...gax.CallOption) *DocumentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDocuments[0:len((*c.CallOptions).ListDocuments):len((*c.CallOptions).ListDocuments)], opts...)
 	it := &DocumentIterator{}
@@ -498,6 +499,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDocument[0:len((*c.CallOptions).GetDocument):len((*c.CallOptions).GetDocument)], opts...)
 	var resp *dialogflowpb.Document
@@ -519,6 +521,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDocument[0:len((*c.CallOptions).CreateDocument):len((*c.CallOptions).CreateDocument)], opts...)
 	var resp *longrunningpb.Operation
@@ -542,6 +545,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportDocuments[0:len((*c.CallOptions).ImportDocuments):len((*c.CallOptions).ImportDocuments)], opts...)
 	var resp *longrunningpb.Operation
@@ -565,6 +569,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDocument[0:len((*c.CallOptions).DeleteDocument):len((*c.CallOptions).DeleteDocument)], opts...)
 	var resp *longrunningpb.Operation
@@ -588,6 +593,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "document.name", url.QueryEscape(req.GetDocument().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDocument[0:len((*c.CallOptions).UpdateDocument):len((*c.CallOptions).UpdateDocument)], opts...)
 	var resp *longrunningpb.Operation
@@ -611,6 +617,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReloadDocument[0:len((*c.CallOptions).ReloadDocument):len((*c.CallOptions).ReloadDocument)], opts...)
 	var resp *longrunningpb.Operation
@@ -634,6 +641,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportDocument[0:len((*c.CallOptions).ExportDocument):len((*c.CallOptions).ExportDocument)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/dialogflow/apiv2/entity_types_client.go b/dialogflow/apiv2/entity_types_client.go
index 7199743..6bdc011 100644
--- a/dialogflow/apiv2/entity_types_client.go
+++ b/dialogflow/apiv2/entity_types_client.go
@@ -492,7 +492,7 @@
 // use by Google-written clients.
 func (c *entityTypesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -504,6 +504,7 @@
 
 func (c *entityTypesGRPCClient) ListEntityTypes(ctx context.Context, req *dialogflowpb.ListEntityTypesRequest, opts ...gax.CallOption) *EntityTypeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEntityTypes[0:len((*c.CallOptions).ListEntityTypes):len((*c.CallOptions).ListEntityTypes)], opts...)
 	it := &EntityTypeIterator{}
@@ -553,6 +554,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEntityType[0:len((*c.CallOptions).GetEntityType):len((*c.CallOptions).GetEntityType)], opts...)
 	var resp *dialogflowpb.EntityType
@@ -574,6 +576,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEntityType[0:len((*c.CallOptions).CreateEntityType):len((*c.CallOptions).CreateEntityType)], opts...)
 	var resp *dialogflowpb.EntityType
@@ -595,6 +598,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entity_type.name", url.QueryEscape(req.GetEntityType().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEntityType[0:len((*c.CallOptions).UpdateEntityType):len((*c.CallOptions).UpdateEntityType)], opts...)
 	var resp *dialogflowpb.EntityType
@@ -616,6 +620,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEntityType[0:len((*c.CallOptions).DeleteEntityType):len((*c.CallOptions).DeleteEntityType)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -633,6 +638,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchUpdateEntityTypes[0:len((*c.CallOptions).BatchUpdateEntityTypes):len((*c.CallOptions).BatchUpdateEntityTypes)], opts...)
 	var resp *longrunningpb.Operation
@@ -656,6 +662,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchDeleteEntityTypes[0:len((*c.CallOptions).BatchDeleteEntityTypes):len((*c.CallOptions).BatchDeleteEntityTypes)], opts...)
 	var resp *longrunningpb.Operation
@@ -679,6 +686,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCreateEntities[0:len((*c.CallOptions).BatchCreateEntities):len((*c.CallOptions).BatchCreateEntities)], opts...)
 	var resp *longrunningpb.Operation
@@ -702,6 +710,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchUpdateEntities[0:len((*c.CallOptions).BatchUpdateEntities):len((*c.CallOptions).BatchUpdateEntities)], opts...)
 	var resp *longrunningpb.Operation
@@ -725,6 +734,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchDeleteEntities[0:len((*c.CallOptions).BatchDeleteEntities):len((*c.CallOptions).BatchDeleteEntities)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/dialogflow/apiv2/environments_client.go b/dialogflow/apiv2/environments_client.go
index 56b9e64..fbabdd3 100644
--- a/dialogflow/apiv2/environments_client.go
+++ b/dialogflow/apiv2/environments_client.go
@@ -288,7 +288,7 @@
 // use by Google-written clients.
 func (c *environmentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -300,6 +300,7 @@
 
 func (c *environmentsGRPCClient) ListEnvironments(ctx context.Context, req *dialogflowpb.ListEnvironmentsRequest, opts ...gax.CallOption) *EnvironmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEnvironments[0:len((*c.CallOptions).ListEnvironments):len((*c.CallOptions).ListEnvironments)], opts...)
 	it := &EnvironmentIterator{}
@@ -349,6 +350,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEnvironment[0:len((*c.CallOptions).GetEnvironment):len((*c.CallOptions).GetEnvironment)], opts...)
 	var resp *dialogflowpb.Environment
@@ -370,6 +372,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEnvironment[0:len((*c.CallOptions).CreateEnvironment):len((*c.CallOptions).CreateEnvironment)], opts...)
 	var resp *dialogflowpb.Environment
@@ -391,6 +394,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "environment.name", url.QueryEscape(req.GetEnvironment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEnvironment[0:len((*c.CallOptions).UpdateEnvironment):len((*c.CallOptions).UpdateEnvironment)], opts...)
 	var resp *dialogflowpb.Environment
@@ -412,6 +416,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEnvironment[0:len((*c.CallOptions).DeleteEnvironment):len((*c.CallOptions).DeleteEnvironment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -424,6 +429,7 @@
 
 func (c *environmentsGRPCClient) GetEnvironmentHistory(ctx context.Context, req *dialogflowpb.GetEnvironmentHistoryRequest, opts ...gax.CallOption) *EnvironmentHistory_EntryIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEnvironmentHistory[0:len((*c.CallOptions).GetEnvironmentHistory):len((*c.CallOptions).GetEnvironmentHistory)], opts...)
 	it := &EnvironmentHistory_EntryIterator{}
diff --git a/dialogflow/apiv2/fulfillments_client.go b/dialogflow/apiv2/fulfillments_client.go
index 9607f42..50eb9f5 100644
--- a/dialogflow/apiv2/fulfillments_client.go
+++ b/dialogflow/apiv2/fulfillments_client.go
@@ -203,7 +203,7 @@
 // use by Google-written clients.
 func (c *fulfillmentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -220,6 +220,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFulfillment[0:len((*c.CallOptions).GetFulfillment):len((*c.CallOptions).GetFulfillment)], opts...)
 	var resp *dialogflowpb.Fulfillment
@@ -241,6 +242,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "fulfillment.name", url.QueryEscape(req.GetFulfillment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFulfillment[0:len((*c.CallOptions).UpdateFulfillment):len((*c.CallOptions).UpdateFulfillment)], opts...)
 	var resp *dialogflowpb.Fulfillment
diff --git a/dialogflow/apiv2/intents_client.go b/dialogflow/apiv2/intents_client.go
index 9a413b3..a621660 100644
--- a/dialogflow/apiv2/intents_client.go
+++ b/dialogflow/apiv2/intents_client.go
@@ -373,7 +373,7 @@
 // use by Google-written clients.
 func (c *intentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -385,6 +385,7 @@
 
 func (c *intentsGRPCClient) ListIntents(ctx context.Context, req *dialogflowpb.ListIntentsRequest, opts ...gax.CallOption) *IntentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListIntents[0:len((*c.CallOptions).ListIntents):len((*c.CallOptions).ListIntents)], opts...)
 	it := &IntentIterator{}
@@ -434,6 +435,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIntent[0:len((*c.CallOptions).GetIntent):len((*c.CallOptions).GetIntent)], opts...)
 	var resp *dialogflowpb.Intent
@@ -455,6 +457,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateIntent[0:len((*c.CallOptions).CreateIntent):len((*c.CallOptions).CreateIntent)], opts...)
 	var resp *dialogflowpb.Intent
@@ -476,6 +479,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "intent.name", url.QueryEscape(req.GetIntent().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateIntent[0:len((*c.CallOptions).UpdateIntent):len((*c.CallOptions).UpdateIntent)], opts...)
 	var resp *dialogflowpb.Intent
@@ -497,6 +501,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteIntent[0:len((*c.CallOptions).DeleteIntent):len((*c.CallOptions).DeleteIntent)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -514,6 +519,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchUpdateIntents[0:len((*c.CallOptions).BatchUpdateIntents):len((*c.CallOptions).BatchUpdateIntents)], opts...)
 	var resp *longrunningpb.Operation
@@ -537,6 +543,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchDeleteIntents[0:len((*c.CallOptions).BatchDeleteIntents):len((*c.CallOptions).BatchDeleteIntents)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/dialogflow/apiv2/knowledge_bases_client.go b/dialogflow/apiv2/knowledge_bases_client.go
index d095ab3..0e7625b 100644
--- a/dialogflow/apiv2/knowledge_bases_client.go
+++ b/dialogflow/apiv2/knowledge_bases_client.go
@@ -259,7 +259,7 @@
 // use by Google-written clients.
 func (c *knowledgeBasesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -271,6 +271,7 @@
 
 func (c *knowledgeBasesGRPCClient) ListKnowledgeBases(ctx context.Context, req *dialogflowpb.ListKnowledgeBasesRequest, opts ...gax.CallOption) *KnowledgeBaseIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListKnowledgeBases[0:len((*c.CallOptions).ListKnowledgeBases):len((*c.CallOptions).ListKnowledgeBases)], opts...)
 	it := &KnowledgeBaseIterator{}
@@ -320,6 +321,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetKnowledgeBase[0:len((*c.CallOptions).GetKnowledgeBase):len((*c.CallOptions).GetKnowledgeBase)], opts...)
 	var resp *dialogflowpb.KnowledgeBase
@@ -341,6 +343,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateKnowledgeBase[0:len((*c.CallOptions).CreateKnowledgeBase):len((*c.CallOptions).CreateKnowledgeBase)], opts...)
 	var resp *dialogflowpb.KnowledgeBase
@@ -362,6 +365,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteKnowledgeBase[0:len((*c.CallOptions).DeleteKnowledgeBase):len((*c.CallOptions).DeleteKnowledgeBase)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -379,6 +383,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "knowledge_base.name", url.QueryEscape(req.GetKnowledgeBase().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateKnowledgeBase[0:len((*c.CallOptions).UpdateKnowledgeBase):len((*c.CallOptions).UpdateKnowledgeBase)], opts...)
 	var resp *dialogflowpb.KnowledgeBase
diff --git a/dialogflow/apiv2/participants_client.go b/dialogflow/apiv2/participants_client.go
index 97fdf62..4974c96 100644
--- a/dialogflow/apiv2/participants_client.go
+++ b/dialogflow/apiv2/participants_client.go
@@ -321,7 +321,7 @@
 // use by Google-written clients.
 func (c *participantsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -338,6 +338,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateParticipant[0:len((*c.CallOptions).CreateParticipant):len((*c.CallOptions).CreateParticipant)], opts...)
 	var resp *dialogflowpb.Participant
@@ -359,6 +360,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetParticipant[0:len((*c.CallOptions).GetParticipant):len((*c.CallOptions).GetParticipant)], opts...)
 	var resp *dialogflowpb.Participant
@@ -375,6 +377,7 @@
 
 func (c *participantsGRPCClient) ListParticipants(ctx context.Context, req *dialogflowpb.ListParticipantsRequest, opts ...gax.CallOption) *ParticipantIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListParticipants[0:len((*c.CallOptions).ListParticipants):len((*c.CallOptions).ListParticipants)], opts...)
 	it := &ParticipantIterator{}
@@ -424,6 +427,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "participant.name", url.QueryEscape(req.GetParticipant().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateParticipant[0:len((*c.CallOptions).UpdateParticipant):len((*c.CallOptions).UpdateParticipant)], opts...)
 	var resp *dialogflowpb.Participant
@@ -445,6 +449,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "participant", url.QueryEscape(req.GetParticipant())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AnalyzeContent[0:len((*c.CallOptions).AnalyzeContent):len((*c.CallOptions).AnalyzeContent)], opts...)
 	var resp *dialogflowpb.AnalyzeContentResponse
@@ -466,6 +471,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SuggestArticles[0:len((*c.CallOptions).SuggestArticles):len((*c.CallOptions).SuggestArticles)], opts...)
 	var resp *dialogflowpb.SuggestArticlesResponse
@@ -487,6 +493,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SuggestFaqAnswers[0:len((*c.CallOptions).SuggestFaqAnswers):len((*c.CallOptions).SuggestFaqAnswers)], opts...)
 	var resp *dialogflowpb.SuggestFaqAnswersResponse
@@ -508,6 +515,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SuggestSmartReplies[0:len((*c.CallOptions).SuggestSmartReplies):len((*c.CallOptions).SuggestSmartReplies)], opts...)
 	var resp *dialogflowpb.SuggestSmartRepliesResponse
diff --git a/dialogflow/apiv2/session_entity_types_client.go b/dialogflow/apiv2/session_entity_types_client.go
index 0a93858..4b5509e 100644
--- a/dialogflow/apiv2/session_entity_types_client.go
+++ b/dialogflow/apiv2/session_entity_types_client.go
@@ -282,7 +282,7 @@
 // use by Google-written clients.
 func (c *sessionEntityTypesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -294,6 +294,7 @@
 
 func (c *sessionEntityTypesGRPCClient) ListSessionEntityTypes(ctx context.Context, req *dialogflowpb.ListSessionEntityTypesRequest, opts ...gax.CallOption) *SessionEntityTypeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSessionEntityTypes[0:len((*c.CallOptions).ListSessionEntityTypes):len((*c.CallOptions).ListSessionEntityTypes)], opts...)
 	it := &SessionEntityTypeIterator{}
@@ -343,6 +344,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSessionEntityType[0:len((*c.CallOptions).GetSessionEntityType):len((*c.CallOptions).GetSessionEntityType)], opts...)
 	var resp *dialogflowpb.SessionEntityType
@@ -364,6 +366,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSessionEntityType[0:len((*c.CallOptions).CreateSessionEntityType):len((*c.CallOptions).CreateSessionEntityType)], opts...)
 	var resp *dialogflowpb.SessionEntityType
@@ -385,6 +388,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session_entity_type.name", url.QueryEscape(req.GetSessionEntityType().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSessionEntityType[0:len((*c.CallOptions).UpdateSessionEntityType):len((*c.CallOptions).UpdateSessionEntityType)], opts...)
 	var resp *dialogflowpb.SessionEntityType
@@ -406,6 +410,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSessionEntityType[0:len((*c.CallOptions).DeleteSessionEntityType):len((*c.CallOptions).DeleteSessionEntityType)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/apiv2/sessions_client.go b/dialogflow/apiv2/sessions_client.go
index 97c21c6..98a3bb0 100644
--- a/dialogflow/apiv2/sessions_client.go
+++ b/dialogflow/apiv2/sessions_client.go
@@ -226,7 +226,7 @@
 // use by Google-written clients.
 func (c *sessionsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -243,6 +243,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DetectIntent[0:len((*c.CallOptions).DetectIntent):len((*c.CallOptions).DetectIntent)], opts...)
 	var resp *dialogflowpb.DetectIntentResponse
diff --git a/dialogflow/apiv2/version.go b/dialogflow/apiv2/version.go
new file mode 100644
index 0000000..50eb6dd
--- /dev/null
+++ b/dialogflow/apiv2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package dialogflow
+
+import "cloud.google.com/go/dialogflow/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/dialogflow/apiv2/versions_client.go b/dialogflow/apiv2/versions_client.go
index 16b020a..586599e 100644
--- a/dialogflow/apiv2/versions_client.go
+++ b/dialogflow/apiv2/versions_client.go
@@ -265,7 +265,7 @@
 // use by Google-written clients.
 func (c *versionsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -277,6 +277,7 @@
 
 func (c *versionsGRPCClient) ListVersions(ctx context.Context, req *dialogflowpb.ListVersionsRequest, opts ...gax.CallOption) *VersionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListVersions[0:len((*c.CallOptions).ListVersions):len((*c.CallOptions).ListVersions)], opts...)
 	it := &VersionIterator{}
@@ -326,6 +327,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetVersion[0:len((*c.CallOptions).GetVersion):len((*c.CallOptions).GetVersion)], opts...)
 	var resp *dialogflowpb.Version
@@ -347,6 +349,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateVersion[0:len((*c.CallOptions).CreateVersion):len((*c.CallOptions).CreateVersion)], opts...)
 	var resp *dialogflowpb.Version
@@ -368,6 +371,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "version.name", url.QueryEscape(req.GetVersion().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateVersion[0:len((*c.CallOptions).UpdateVersion):len((*c.CallOptions).UpdateVersion)], opts...)
 	var resp *dialogflowpb.Version
@@ -389,6 +393,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteVersion[0:len((*c.CallOptions).DeleteVersion):len((*c.CallOptions).DeleteVersion)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3/agents_client.go b/dialogflow/cx/apiv3/agents_client.go
index 987f1cf..2ca5f64 100644
--- a/dialogflow/cx/apiv3/agents_client.go
+++ b/dialogflow/cx/apiv3/agents_client.go
@@ -407,7 +407,7 @@
 // use by Google-written clients.
 func (c *agentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -419,6 +419,7 @@
 
 func (c *agentsGRPCClient) ListAgents(ctx context.Context, req *cxpb.ListAgentsRequest, opts ...gax.CallOption) *AgentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAgents[0:len((*c.CallOptions).ListAgents):len((*c.CallOptions).ListAgents)], opts...)
 	it := &AgentIterator{}
@@ -468,6 +469,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAgent[0:len((*c.CallOptions).GetAgent):len((*c.CallOptions).GetAgent)], opts...)
 	var resp *cxpb.Agent
@@ -489,6 +491,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAgent[0:len((*c.CallOptions).CreateAgent):len((*c.CallOptions).CreateAgent)], opts...)
 	var resp *cxpb.Agent
@@ -510,6 +513,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "agent.name", url.QueryEscape(req.GetAgent().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAgent[0:len((*c.CallOptions).UpdateAgent):len((*c.CallOptions).UpdateAgent)], opts...)
 	var resp *cxpb.Agent
@@ -531,6 +535,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAgent[0:len((*c.CallOptions).DeleteAgent):len((*c.CallOptions).DeleteAgent)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -548,6 +553,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportAgent[0:len((*c.CallOptions).ExportAgent):len((*c.CallOptions).ExportAgent)], opts...)
 	var resp *longrunningpb.Operation
@@ -571,6 +577,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RestoreAgent[0:len((*c.CallOptions).RestoreAgent):len((*c.CallOptions).RestoreAgent)], opts...)
 	var resp *longrunningpb.Operation
@@ -594,6 +601,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ValidateAgent[0:len((*c.CallOptions).ValidateAgent):len((*c.CallOptions).ValidateAgent)], opts...)
 	var resp *cxpb.AgentValidationResult
@@ -615,6 +623,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAgentValidationResult[0:len((*c.CallOptions).GetAgentValidationResult):len((*c.CallOptions).GetAgentValidationResult)], opts...)
 	var resp *cxpb.AgentValidationResult
diff --git a/dialogflow/cx/apiv3/changelogs_client.go b/dialogflow/cx/apiv3/changelogs_client.go
index 16f51fb..73af6f6 100644
--- a/dialogflow/cx/apiv3/changelogs_client.go
+++ b/dialogflow/cx/apiv3/changelogs_client.go
@@ -205,7 +205,7 @@
 // use by Google-written clients.
 func (c *changelogsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -217,6 +217,7 @@
 
 func (c *changelogsGRPCClient) ListChangelogs(ctx context.Context, req *cxpb.ListChangelogsRequest, opts ...gax.CallOption) *ChangelogIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListChangelogs[0:len((*c.CallOptions).ListChangelogs):len((*c.CallOptions).ListChangelogs)], opts...)
 	it := &ChangelogIterator{}
@@ -266,6 +267,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetChangelog[0:len((*c.CallOptions).GetChangelog):len((*c.CallOptions).GetChangelog)], opts...)
 	var resp *cxpb.Changelog
diff --git a/dialogflow/cx/apiv3/deployments_client.go b/dialogflow/cx/apiv3/deployments_client.go
index 6f529d0..e2d69d1 100644
--- a/dialogflow/cx/apiv3/deployments_client.go
+++ b/dialogflow/cx/apiv3/deployments_client.go
@@ -205,7 +205,7 @@
 // use by Google-written clients.
 func (c *deploymentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -217,6 +217,7 @@
 
 func (c *deploymentsGRPCClient) ListDeployments(ctx context.Context, req *cxpb.ListDeploymentsRequest, opts ...gax.CallOption) *DeploymentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDeployments[0:len((*c.CallOptions).ListDeployments):len((*c.CallOptions).ListDeployments)], opts...)
 	it := &DeploymentIterator{}
@@ -266,6 +267,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDeployment[0:len((*c.CallOptions).GetDeployment):len((*c.CallOptions).GetDeployment)], opts...)
 	var resp *cxpb.Deployment
diff --git a/dialogflow/cx/apiv3/doc.go b/dialogflow/cx/apiv3/doc.go
index 39803fc..4cb0f40 100644
--- a/dialogflow/cx/apiv3/doc.go
+++ b/dialogflow/cx/apiv3/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dialogflow/cx/apiv3/entity_types_client.go b/dialogflow/cx/apiv3/entity_types_client.go
index cdf8599..670b7a4 100644
--- a/dialogflow/cx/apiv3/entity_types_client.go
+++ b/dialogflow/cx/apiv3/entity_types_client.go
@@ -271,7 +271,7 @@
 // use by Google-written clients.
 func (c *entityTypesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -283,6 +283,7 @@
 
 func (c *entityTypesGRPCClient) ListEntityTypes(ctx context.Context, req *cxpb.ListEntityTypesRequest, opts ...gax.CallOption) *EntityTypeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEntityTypes[0:len((*c.CallOptions).ListEntityTypes):len((*c.CallOptions).ListEntityTypes)], opts...)
 	it := &EntityTypeIterator{}
@@ -332,6 +333,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEntityType[0:len((*c.CallOptions).GetEntityType):len((*c.CallOptions).GetEntityType)], opts...)
 	var resp *cxpb.EntityType
@@ -353,6 +355,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEntityType[0:len((*c.CallOptions).CreateEntityType):len((*c.CallOptions).CreateEntityType)], opts...)
 	var resp *cxpb.EntityType
@@ -374,6 +377,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entity_type.name", url.QueryEscape(req.GetEntityType().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEntityType[0:len((*c.CallOptions).UpdateEntityType):len((*c.CallOptions).UpdateEntityType)], opts...)
 	var resp *cxpb.EntityType
@@ -395,6 +399,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEntityType[0:len((*c.CallOptions).DeleteEntityType):len((*c.CallOptions).DeleteEntityType)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3/environments_client.go b/dialogflow/cx/apiv3/environments_client.go
index 9ed8e2d..695d4bf 100644
--- a/dialogflow/cx/apiv3/environments_client.go
+++ b/dialogflow/cx/apiv3/environments_client.go
@@ -418,7 +418,7 @@
 // use by Google-written clients.
 func (c *environmentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -430,6 +430,7 @@
 
 func (c *environmentsGRPCClient) ListEnvironments(ctx context.Context, req *cxpb.ListEnvironmentsRequest, opts ...gax.CallOption) *EnvironmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEnvironments[0:len((*c.CallOptions).ListEnvironments):len((*c.CallOptions).ListEnvironments)], opts...)
 	it := &EnvironmentIterator{}
@@ -479,6 +480,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEnvironment[0:len((*c.CallOptions).GetEnvironment):len((*c.CallOptions).GetEnvironment)], opts...)
 	var resp *cxpb.Environment
@@ -500,6 +502,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEnvironment[0:len((*c.CallOptions).CreateEnvironment):len((*c.CallOptions).CreateEnvironment)], opts...)
 	var resp *longrunningpb.Operation
@@ -523,6 +526,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "environment.name", url.QueryEscape(req.GetEnvironment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEnvironment[0:len((*c.CallOptions).UpdateEnvironment):len((*c.CallOptions).UpdateEnvironment)], opts...)
 	var resp *longrunningpb.Operation
@@ -546,6 +550,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEnvironment[0:len((*c.CallOptions).DeleteEnvironment):len((*c.CallOptions).DeleteEnvironment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -558,6 +563,7 @@
 
 func (c *environmentsGRPCClient) LookupEnvironmentHistory(ctx context.Context, req *cxpb.LookupEnvironmentHistoryRequest, opts ...gax.CallOption) *EnvironmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LookupEnvironmentHistory[0:len((*c.CallOptions).LookupEnvironmentHistory):len((*c.CallOptions).LookupEnvironmentHistory)], opts...)
 	it := &EnvironmentIterator{}
@@ -607,6 +613,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "environment", url.QueryEscape(req.GetEnvironment())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunContinuousTest[0:len((*c.CallOptions).RunContinuousTest):len((*c.CallOptions).RunContinuousTest)], opts...)
 	var resp *longrunningpb.Operation
@@ -625,6 +632,7 @@
 
 func (c *environmentsGRPCClient) ListContinuousTestResults(ctx context.Context, req *cxpb.ListContinuousTestResultsRequest, opts ...gax.CallOption) *ContinuousTestResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListContinuousTestResults[0:len((*c.CallOptions).ListContinuousTestResults):len((*c.CallOptions).ListContinuousTestResults)], opts...)
 	it := &ContinuousTestResultIterator{}
@@ -674,6 +682,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "environment", url.QueryEscape(req.GetEnvironment())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeployFlow[0:len((*c.CallOptions).DeployFlow):len((*c.CallOptions).DeployFlow)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/dialogflow/cx/apiv3/experiments_client.go b/dialogflow/cx/apiv3/experiments_client.go
index 9f9f09e..1850c37 100644
--- a/dialogflow/cx/apiv3/experiments_client.go
+++ b/dialogflow/cx/apiv3/experiments_client.go
@@ -297,7 +297,7 @@
 // use by Google-written clients.
 func (c *experimentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -309,6 +309,7 @@
 
 func (c *experimentsGRPCClient) ListExperiments(ctx context.Context, req *cxpb.ListExperimentsRequest, opts ...gax.CallOption) *ExperimentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListExperiments[0:len((*c.CallOptions).ListExperiments):len((*c.CallOptions).ListExperiments)], opts...)
 	it := &ExperimentIterator{}
@@ -358,6 +359,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetExperiment[0:len((*c.CallOptions).GetExperiment):len((*c.CallOptions).GetExperiment)], opts...)
 	var resp *cxpb.Experiment
@@ -379,6 +381,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateExperiment[0:len((*c.CallOptions).CreateExperiment):len((*c.CallOptions).CreateExperiment)], opts...)
 	var resp *cxpb.Experiment
@@ -400,6 +403,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "experiment.name", url.QueryEscape(req.GetExperiment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateExperiment[0:len((*c.CallOptions).UpdateExperiment):len((*c.CallOptions).UpdateExperiment)], opts...)
 	var resp *cxpb.Experiment
@@ -421,6 +425,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteExperiment[0:len((*c.CallOptions).DeleteExperiment):len((*c.CallOptions).DeleteExperiment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -438,6 +443,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartExperiment[0:len((*c.CallOptions).StartExperiment):len((*c.CallOptions).StartExperiment)], opts...)
 	var resp *cxpb.Experiment
@@ -459,6 +465,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StopExperiment[0:len((*c.CallOptions).StopExperiment):len((*c.CallOptions).StopExperiment)], opts...)
 	var resp *cxpb.Experiment
diff --git a/dialogflow/cx/apiv3/flows_client.go b/dialogflow/cx/apiv3/flows_client.go
index 2514bb9..fcea342 100644
--- a/dialogflow/cx/apiv3/flows_client.go
+++ b/dialogflow/cx/apiv3/flows_client.go
@@ -446,7 +446,7 @@
 // use by Google-written clients.
 func (c *flowsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -463,6 +463,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateFlow[0:len((*c.CallOptions).CreateFlow):len((*c.CallOptions).CreateFlow)], opts...)
 	var resp *cxpb.Flow
@@ -484,6 +485,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteFlow[0:len((*c.CallOptions).DeleteFlow):len((*c.CallOptions).DeleteFlow)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -496,6 +498,7 @@
 
 func (c *flowsGRPCClient) ListFlows(ctx context.Context, req *cxpb.ListFlowsRequest, opts ...gax.CallOption) *FlowIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFlows[0:len((*c.CallOptions).ListFlows):len((*c.CallOptions).ListFlows)], opts...)
 	it := &FlowIterator{}
@@ -545,6 +548,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFlow[0:len((*c.CallOptions).GetFlow):len((*c.CallOptions).GetFlow)], opts...)
 	var resp *cxpb.Flow
@@ -566,6 +570,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "flow.name", url.QueryEscape(req.GetFlow().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFlow[0:len((*c.CallOptions).UpdateFlow):len((*c.CallOptions).UpdateFlow)], opts...)
 	var resp *cxpb.Flow
@@ -587,6 +592,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TrainFlow[0:len((*c.CallOptions).TrainFlow):len((*c.CallOptions).TrainFlow)], opts...)
 	var resp *longrunningpb.Operation
@@ -610,6 +616,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ValidateFlow[0:len((*c.CallOptions).ValidateFlow):len((*c.CallOptions).ValidateFlow)], opts...)
 	var resp *cxpb.FlowValidationResult
@@ -631,6 +638,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFlowValidationResult[0:len((*c.CallOptions).GetFlowValidationResult):len((*c.CallOptions).GetFlowValidationResult)], opts...)
 	var resp *cxpb.FlowValidationResult
@@ -652,6 +660,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportFlow[0:len((*c.CallOptions).ImportFlow):len((*c.CallOptions).ImportFlow)], opts...)
 	var resp *longrunningpb.Operation
@@ -675,6 +684,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportFlow[0:len((*c.CallOptions).ExportFlow):len((*c.CallOptions).ExportFlow)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/dialogflow/cx/apiv3/intents_client.go b/dialogflow/cx/apiv3/intents_client.go
index a9c26a3..df55338 100644
--- a/dialogflow/cx/apiv3/intents_client.go
+++ b/dialogflow/cx/apiv3/intents_client.go
@@ -271,7 +271,7 @@
 // use by Google-written clients.
 func (c *intentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -283,6 +283,7 @@
 
 func (c *intentsGRPCClient) ListIntents(ctx context.Context, req *cxpb.ListIntentsRequest, opts ...gax.CallOption) *IntentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListIntents[0:len((*c.CallOptions).ListIntents):len((*c.CallOptions).ListIntents)], opts...)
 	it := &IntentIterator{}
@@ -332,6 +333,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIntent[0:len((*c.CallOptions).GetIntent):len((*c.CallOptions).GetIntent)], opts...)
 	var resp *cxpb.Intent
@@ -353,6 +355,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateIntent[0:len((*c.CallOptions).CreateIntent):len((*c.CallOptions).CreateIntent)], opts...)
 	var resp *cxpb.Intent
@@ -374,6 +377,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "intent.name", url.QueryEscape(req.GetIntent().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateIntent[0:len((*c.CallOptions).UpdateIntent):len((*c.CallOptions).UpdateIntent)], opts...)
 	var resp *cxpb.Intent
@@ -395,6 +399,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteIntent[0:len((*c.CallOptions).DeleteIntent):len((*c.CallOptions).DeleteIntent)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3/pages_client.go b/dialogflow/cx/apiv3/pages_client.go
index 3c9e5a9..5ce75b3 100644
--- a/dialogflow/cx/apiv3/pages_client.go
+++ b/dialogflow/cx/apiv3/pages_client.go
@@ -271,7 +271,7 @@
 // use by Google-written clients.
 func (c *pagesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -283,6 +283,7 @@
 
 func (c *pagesGRPCClient) ListPages(ctx context.Context, req *cxpb.ListPagesRequest, opts ...gax.CallOption) *PageIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPages[0:len((*c.CallOptions).ListPages):len((*c.CallOptions).ListPages)], opts...)
 	it := &PageIterator{}
@@ -332,6 +333,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPage[0:len((*c.CallOptions).GetPage):len((*c.CallOptions).GetPage)], opts...)
 	var resp *cxpb.Page
@@ -353,6 +355,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreatePage[0:len((*c.CallOptions).CreatePage):len((*c.CallOptions).CreatePage)], opts...)
 	var resp *cxpb.Page
@@ -374,6 +377,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "page.name", url.QueryEscape(req.GetPage().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdatePage[0:len((*c.CallOptions).UpdatePage):len((*c.CallOptions).UpdatePage)], opts...)
 	var resp *cxpb.Page
@@ -395,6 +399,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePage[0:len((*c.CallOptions).DeletePage):len((*c.CallOptions).DeletePage)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3/security_settings_client.go b/dialogflow/cx/apiv3/security_settings_client.go
index cb042e9..fb0c246 100644
--- a/dialogflow/cx/apiv3/security_settings_client.go
+++ b/dialogflow/cx/apiv3/security_settings_client.go
@@ -260,7 +260,7 @@
 // use by Google-written clients.
 func (c *securitySettingsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -277,6 +277,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSecuritySettings[0:len((*c.CallOptions).CreateSecuritySettings):len((*c.CallOptions).CreateSecuritySettings)], opts...)
 	var resp *cxpb.SecuritySettings
@@ -298,6 +299,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSecuritySettings[0:len((*c.CallOptions).GetSecuritySettings):len((*c.CallOptions).GetSecuritySettings)], opts...)
 	var resp *cxpb.SecuritySettings
@@ -319,6 +321,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "security_settings.name", url.QueryEscape(req.GetSecuritySettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSecuritySettings[0:len((*c.CallOptions).UpdateSecuritySettings):len((*c.CallOptions).UpdateSecuritySettings)], opts...)
 	var resp *cxpb.SecuritySettings
@@ -335,6 +338,7 @@
 
 func (c *securitySettingsGRPCClient) ListSecuritySettings(ctx context.Context, req *cxpb.ListSecuritySettingsRequest, opts ...gax.CallOption) *SecuritySettingsIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSecuritySettings[0:len((*c.CallOptions).ListSecuritySettings):len((*c.CallOptions).ListSecuritySettings)], opts...)
 	it := &SecuritySettingsIterator{}
@@ -384,6 +388,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSecuritySettings[0:len((*c.CallOptions).DeleteSecuritySettings):len((*c.CallOptions).DeleteSecuritySettings)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3/session_entity_types_client.go b/dialogflow/cx/apiv3/session_entity_types_client.go
index e98202a..7847a5c 100644
--- a/dialogflow/cx/apiv3/session_entity_types_client.go
+++ b/dialogflow/cx/apiv3/session_entity_types_client.go
@@ -259,7 +259,7 @@
 // use by Google-written clients.
 func (c *sessionEntityTypesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -271,6 +271,7 @@
 
 func (c *sessionEntityTypesGRPCClient) ListSessionEntityTypes(ctx context.Context, req *cxpb.ListSessionEntityTypesRequest, opts ...gax.CallOption) *SessionEntityTypeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSessionEntityTypes[0:len((*c.CallOptions).ListSessionEntityTypes):len((*c.CallOptions).ListSessionEntityTypes)], opts...)
 	it := &SessionEntityTypeIterator{}
@@ -320,6 +321,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSessionEntityType[0:len((*c.CallOptions).GetSessionEntityType):len((*c.CallOptions).GetSessionEntityType)], opts...)
 	var resp *cxpb.SessionEntityType
@@ -341,6 +343,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSessionEntityType[0:len((*c.CallOptions).CreateSessionEntityType):len((*c.CallOptions).CreateSessionEntityType)], opts...)
 	var resp *cxpb.SessionEntityType
@@ -362,6 +365,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session_entity_type.name", url.QueryEscape(req.GetSessionEntityType().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSessionEntityType[0:len((*c.CallOptions).UpdateSessionEntityType):len((*c.CallOptions).UpdateSessionEntityType)], opts...)
 	var resp *cxpb.SessionEntityType
@@ -383,6 +387,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSessionEntityType[0:len((*c.CallOptions).DeleteSessionEntityType):len((*c.CallOptions).DeleteSessionEntityType)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3/sessions_client.go b/dialogflow/cx/apiv3/sessions_client.go
index 007fac8..aa6aaa6 100644
--- a/dialogflow/cx/apiv3/sessions_client.go
+++ b/dialogflow/cx/apiv3/sessions_client.go
@@ -249,7 +249,7 @@
 // use by Google-written clients.
 func (c *sessionsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -266,6 +266,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DetectIntent[0:len((*c.CallOptions).DetectIntent):len((*c.CallOptions).DetectIntent)], opts...)
 	var resp *cxpb.DetectIntentResponse
@@ -302,6 +303,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MatchIntent[0:len((*c.CallOptions).MatchIntent):len((*c.CallOptions).MatchIntent)], opts...)
 	var resp *cxpb.MatchIntentResponse
@@ -323,6 +325,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "match_intent_request.session", url.QueryEscape(req.GetMatchIntentRequest().GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FulfillIntent[0:len((*c.CallOptions).FulfillIntent):len((*c.CallOptions).FulfillIntent)], opts...)
 	var resp *cxpb.FulfillIntentResponse
diff --git a/dialogflow/cx/apiv3/test_cases_client.go b/dialogflow/cx/apiv3/test_cases_client.go
index 8a603bd..be503ae 100644
--- a/dialogflow/cx/apiv3/test_cases_client.go
+++ b/dialogflow/cx/apiv3/test_cases_client.go
@@ -474,7 +474,7 @@
 // use by Google-written clients.
 func (c *testCasesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -486,6 +486,7 @@
 
 func (c *testCasesGRPCClient) ListTestCases(ctx context.Context, req *cxpb.ListTestCasesRequest, opts ...gax.CallOption) *TestCaseIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTestCases[0:len((*c.CallOptions).ListTestCases):len((*c.CallOptions).ListTestCases)], opts...)
 	it := &TestCaseIterator{}
@@ -535,6 +536,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchDeleteTestCases[0:len((*c.CallOptions).BatchDeleteTestCases):len((*c.CallOptions).BatchDeleteTestCases)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -552,6 +554,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTestCase[0:len((*c.CallOptions).GetTestCase):len((*c.CallOptions).GetTestCase)], opts...)
 	var resp *cxpb.TestCase
@@ -573,6 +576,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTestCase[0:len((*c.CallOptions).CreateTestCase):len((*c.CallOptions).CreateTestCase)], opts...)
 	var resp *cxpb.TestCase
@@ -594,6 +598,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "test_case.name", url.QueryEscape(req.GetTestCase().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTestCase[0:len((*c.CallOptions).UpdateTestCase):len((*c.CallOptions).UpdateTestCase)], opts...)
 	var resp *cxpb.TestCase
@@ -615,6 +620,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunTestCase[0:len((*c.CallOptions).RunTestCase):len((*c.CallOptions).RunTestCase)], opts...)
 	var resp *longrunningpb.Operation
@@ -638,6 +644,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchRunTestCases[0:len((*c.CallOptions).BatchRunTestCases):len((*c.CallOptions).BatchRunTestCases)], opts...)
 	var resp *longrunningpb.Operation
@@ -661,6 +668,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "agent", url.QueryEscape(req.GetAgent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CalculateCoverage[0:len((*c.CallOptions).CalculateCoverage):len((*c.CallOptions).CalculateCoverage)], opts...)
 	var resp *cxpb.CalculateCoverageResponse
@@ -682,6 +690,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportTestCases[0:len((*c.CallOptions).ImportTestCases):len((*c.CallOptions).ImportTestCases)], opts...)
 	var resp *longrunningpb.Operation
@@ -705,6 +714,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportTestCases[0:len((*c.CallOptions).ExportTestCases):len((*c.CallOptions).ExportTestCases)], opts...)
 	var resp *longrunningpb.Operation
@@ -723,6 +733,7 @@
 
 func (c *testCasesGRPCClient) ListTestCaseResults(ctx context.Context, req *cxpb.ListTestCaseResultsRequest, opts ...gax.CallOption) *TestCaseResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTestCaseResults[0:len((*c.CallOptions).ListTestCaseResults):len((*c.CallOptions).ListTestCaseResults)], opts...)
 	it := &TestCaseResultIterator{}
@@ -772,6 +783,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTestCaseResult[0:len((*c.CallOptions).GetTestCaseResult):len((*c.CallOptions).GetTestCaseResult)], opts...)
 	var resp *cxpb.TestCaseResult
diff --git a/dialogflow/cx/apiv3/transition_route_groups_client.go b/dialogflow/cx/apiv3/transition_route_groups_client.go
index bdb7395..f4cd7cd 100644
--- a/dialogflow/cx/apiv3/transition_route_groups_client.go
+++ b/dialogflow/cx/apiv3/transition_route_groups_client.go
@@ -271,7 +271,7 @@
 // use by Google-written clients.
 func (c *transitionRouteGroupsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -283,6 +283,7 @@
 
 func (c *transitionRouteGroupsGRPCClient) ListTransitionRouteGroups(ctx context.Context, req *cxpb.ListTransitionRouteGroupsRequest, opts ...gax.CallOption) *TransitionRouteGroupIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTransitionRouteGroups[0:len((*c.CallOptions).ListTransitionRouteGroups):len((*c.CallOptions).ListTransitionRouteGroups)], opts...)
 	it := &TransitionRouteGroupIterator{}
@@ -332,6 +333,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTransitionRouteGroup[0:len((*c.CallOptions).GetTransitionRouteGroup):len((*c.CallOptions).GetTransitionRouteGroup)], opts...)
 	var resp *cxpb.TransitionRouteGroup
@@ -353,6 +355,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTransitionRouteGroup[0:len((*c.CallOptions).CreateTransitionRouteGroup):len((*c.CallOptions).CreateTransitionRouteGroup)], opts...)
 	var resp *cxpb.TransitionRouteGroup
@@ -374,6 +377,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "transition_route_group.name", url.QueryEscape(req.GetTransitionRouteGroup().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTransitionRouteGroup[0:len((*c.CallOptions).UpdateTransitionRouteGroup):len((*c.CallOptions).UpdateTransitionRouteGroup)], opts...)
 	var resp *cxpb.TransitionRouteGroup
@@ -395,6 +399,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTransitionRouteGroup[0:len((*c.CallOptions).DeleteTransitionRouteGroup):len((*c.CallOptions).DeleteTransitionRouteGroup)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3/version.go b/dialogflow/cx/apiv3/version.go
new file mode 100644
index 0000000..b959cb6
--- /dev/null
+++ b/dialogflow/cx/apiv3/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package cx
+
+import "cloud.google.com/go/dialogflow/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/dialogflow/cx/apiv3/versions_client.go b/dialogflow/cx/apiv3/versions_client.go
index 6e134af..573b713 100644
--- a/dialogflow/cx/apiv3/versions_client.go
+++ b/dialogflow/cx/apiv3/versions_client.go
@@ -352,7 +352,7 @@
 // use by Google-written clients.
 func (c *versionsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -364,6 +364,7 @@
 
 func (c *versionsGRPCClient) ListVersions(ctx context.Context, req *cxpb.ListVersionsRequest, opts ...gax.CallOption) *VersionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListVersions[0:len((*c.CallOptions).ListVersions):len((*c.CallOptions).ListVersions)], opts...)
 	it := &VersionIterator{}
@@ -413,6 +414,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetVersion[0:len((*c.CallOptions).GetVersion):len((*c.CallOptions).GetVersion)], opts...)
 	var resp *cxpb.Version
@@ -434,6 +436,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateVersion[0:len((*c.CallOptions).CreateVersion):len((*c.CallOptions).CreateVersion)], opts...)
 	var resp *longrunningpb.Operation
@@ -457,6 +460,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "version.name", url.QueryEscape(req.GetVersion().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateVersion[0:len((*c.CallOptions).UpdateVersion):len((*c.CallOptions).UpdateVersion)], opts...)
 	var resp *cxpb.Version
@@ -478,6 +482,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteVersion[0:len((*c.CallOptions).DeleteVersion):len((*c.CallOptions).DeleteVersion)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -495,6 +500,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LoadVersion[0:len((*c.CallOptions).LoadVersion):len((*c.CallOptions).LoadVersion)], opts...)
 	var resp *longrunningpb.Operation
@@ -518,6 +524,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "base_version", url.QueryEscape(req.GetBaseVersion())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CompareVersions[0:len((*c.CallOptions).CompareVersions):len((*c.CallOptions).CompareVersions)], opts...)
 	var resp *cxpb.CompareVersionsResponse
diff --git a/dialogflow/cx/apiv3/webhooks_client.go b/dialogflow/cx/apiv3/webhooks_client.go
index 0477ba2..4972900 100644
--- a/dialogflow/cx/apiv3/webhooks_client.go
+++ b/dialogflow/cx/apiv3/webhooks_client.go
@@ -259,7 +259,7 @@
 // use by Google-written clients.
 func (c *webhooksGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -271,6 +271,7 @@
 
 func (c *webhooksGRPCClient) ListWebhooks(ctx context.Context, req *cxpb.ListWebhooksRequest, opts ...gax.CallOption) *WebhookIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListWebhooks[0:len((*c.CallOptions).ListWebhooks):len((*c.CallOptions).ListWebhooks)], opts...)
 	it := &WebhookIterator{}
@@ -320,6 +321,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetWebhook[0:len((*c.CallOptions).GetWebhook):len((*c.CallOptions).GetWebhook)], opts...)
 	var resp *cxpb.Webhook
@@ -341,6 +343,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateWebhook[0:len((*c.CallOptions).CreateWebhook):len((*c.CallOptions).CreateWebhook)], opts...)
 	var resp *cxpb.Webhook
@@ -362,6 +365,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "webhook.name", url.QueryEscape(req.GetWebhook().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateWebhook[0:len((*c.CallOptions).UpdateWebhook):len((*c.CallOptions).UpdateWebhook)], opts...)
 	var resp *cxpb.Webhook
@@ -383,6 +387,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteWebhook[0:len((*c.CallOptions).DeleteWebhook):len((*c.CallOptions).DeleteWebhook)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3beta1/agents_client.go b/dialogflow/cx/apiv3beta1/agents_client.go
index 74d7aae..552e925 100644
--- a/dialogflow/cx/apiv3beta1/agents_client.go
+++ b/dialogflow/cx/apiv3beta1/agents_client.go
@@ -407,7 +407,7 @@
 // use by Google-written clients.
 func (c *agentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -419,6 +419,7 @@
 
 func (c *agentsGRPCClient) ListAgents(ctx context.Context, req *cxpb.ListAgentsRequest, opts ...gax.CallOption) *AgentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAgents[0:len((*c.CallOptions).ListAgents):len((*c.CallOptions).ListAgents)], opts...)
 	it := &AgentIterator{}
@@ -468,6 +469,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAgent[0:len((*c.CallOptions).GetAgent):len((*c.CallOptions).GetAgent)], opts...)
 	var resp *cxpb.Agent
@@ -489,6 +491,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAgent[0:len((*c.CallOptions).CreateAgent):len((*c.CallOptions).CreateAgent)], opts...)
 	var resp *cxpb.Agent
@@ -510,6 +513,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "agent.name", url.QueryEscape(req.GetAgent().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAgent[0:len((*c.CallOptions).UpdateAgent):len((*c.CallOptions).UpdateAgent)], opts...)
 	var resp *cxpb.Agent
@@ -531,6 +535,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAgent[0:len((*c.CallOptions).DeleteAgent):len((*c.CallOptions).DeleteAgent)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -548,6 +553,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportAgent[0:len((*c.CallOptions).ExportAgent):len((*c.CallOptions).ExportAgent)], opts...)
 	var resp *longrunningpb.Operation
@@ -571,6 +577,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RestoreAgent[0:len((*c.CallOptions).RestoreAgent):len((*c.CallOptions).RestoreAgent)], opts...)
 	var resp *longrunningpb.Operation
@@ -594,6 +601,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ValidateAgent[0:len((*c.CallOptions).ValidateAgent):len((*c.CallOptions).ValidateAgent)], opts...)
 	var resp *cxpb.AgentValidationResult
@@ -615,6 +623,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAgentValidationResult[0:len((*c.CallOptions).GetAgentValidationResult):len((*c.CallOptions).GetAgentValidationResult)], opts...)
 	var resp *cxpb.AgentValidationResult
diff --git a/dialogflow/cx/apiv3beta1/changelogs_client.go b/dialogflow/cx/apiv3beta1/changelogs_client.go
index e6432b2..e36a8f3 100644
--- a/dialogflow/cx/apiv3beta1/changelogs_client.go
+++ b/dialogflow/cx/apiv3beta1/changelogs_client.go
@@ -205,7 +205,7 @@
 // use by Google-written clients.
 func (c *changelogsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -217,6 +217,7 @@
 
 func (c *changelogsGRPCClient) ListChangelogs(ctx context.Context, req *cxpb.ListChangelogsRequest, opts ...gax.CallOption) *ChangelogIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListChangelogs[0:len((*c.CallOptions).ListChangelogs):len((*c.CallOptions).ListChangelogs)], opts...)
 	it := &ChangelogIterator{}
@@ -266,6 +267,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetChangelog[0:len((*c.CallOptions).GetChangelog):len((*c.CallOptions).GetChangelog)], opts...)
 	var resp *cxpb.Changelog
diff --git a/dialogflow/cx/apiv3beta1/deployments_client.go b/dialogflow/cx/apiv3beta1/deployments_client.go
index a20cffd..1fa15fa 100644
--- a/dialogflow/cx/apiv3beta1/deployments_client.go
+++ b/dialogflow/cx/apiv3beta1/deployments_client.go
@@ -205,7 +205,7 @@
 // use by Google-written clients.
 func (c *deploymentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -217,6 +217,7 @@
 
 func (c *deploymentsGRPCClient) ListDeployments(ctx context.Context, req *cxpb.ListDeploymentsRequest, opts ...gax.CallOption) *DeploymentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDeployments[0:len((*c.CallOptions).ListDeployments):len((*c.CallOptions).ListDeployments)], opts...)
 	it := &DeploymentIterator{}
@@ -266,6 +267,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDeployment[0:len((*c.CallOptions).GetDeployment):len((*c.CallOptions).GetDeployment)], opts...)
 	var resp *cxpb.Deployment
diff --git a/dialogflow/cx/apiv3beta1/doc.go b/dialogflow/cx/apiv3beta1/doc.go
index d24bf3a..9c6f633 100644
--- a/dialogflow/cx/apiv3beta1/doc.go
+++ b/dialogflow/cx/apiv3beta1/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dialogflow/cx/apiv3beta1/entity_types_client.go b/dialogflow/cx/apiv3beta1/entity_types_client.go
index 2422def..03230e9 100644
--- a/dialogflow/cx/apiv3beta1/entity_types_client.go
+++ b/dialogflow/cx/apiv3beta1/entity_types_client.go
@@ -267,7 +267,7 @@
 // use by Google-written clients.
 func (c *entityTypesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -279,6 +279,7 @@
 
 func (c *entityTypesGRPCClient) ListEntityTypes(ctx context.Context, req *cxpb.ListEntityTypesRequest, opts ...gax.CallOption) *EntityTypeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEntityTypes[0:len((*c.CallOptions).ListEntityTypes):len((*c.CallOptions).ListEntityTypes)], opts...)
 	it := &EntityTypeIterator{}
@@ -328,6 +329,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEntityType[0:len((*c.CallOptions).GetEntityType):len((*c.CallOptions).GetEntityType)], opts...)
 	var resp *cxpb.EntityType
@@ -349,6 +351,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEntityType[0:len((*c.CallOptions).CreateEntityType):len((*c.CallOptions).CreateEntityType)], opts...)
 	var resp *cxpb.EntityType
@@ -370,6 +373,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entity_type.name", url.QueryEscape(req.GetEntityType().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEntityType[0:len((*c.CallOptions).UpdateEntityType):len((*c.CallOptions).UpdateEntityType)], opts...)
 	var resp *cxpb.EntityType
@@ -391,6 +395,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEntityType[0:len((*c.CallOptions).DeleteEntityType):len((*c.CallOptions).DeleteEntityType)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3beta1/environments_client.go b/dialogflow/cx/apiv3beta1/environments_client.go
index 4205d47..2ed249f 100644
--- a/dialogflow/cx/apiv3beta1/environments_client.go
+++ b/dialogflow/cx/apiv3beta1/environments_client.go
@@ -418,7 +418,7 @@
 // use by Google-written clients.
 func (c *environmentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -430,6 +430,7 @@
 
 func (c *environmentsGRPCClient) ListEnvironments(ctx context.Context, req *cxpb.ListEnvironmentsRequest, opts ...gax.CallOption) *EnvironmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEnvironments[0:len((*c.CallOptions).ListEnvironments):len((*c.CallOptions).ListEnvironments)], opts...)
 	it := &EnvironmentIterator{}
@@ -479,6 +480,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEnvironment[0:len((*c.CallOptions).GetEnvironment):len((*c.CallOptions).GetEnvironment)], opts...)
 	var resp *cxpb.Environment
@@ -500,6 +502,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEnvironment[0:len((*c.CallOptions).CreateEnvironment):len((*c.CallOptions).CreateEnvironment)], opts...)
 	var resp *longrunningpb.Operation
@@ -523,6 +526,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "environment.name", url.QueryEscape(req.GetEnvironment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEnvironment[0:len((*c.CallOptions).UpdateEnvironment):len((*c.CallOptions).UpdateEnvironment)], opts...)
 	var resp *longrunningpb.Operation
@@ -546,6 +550,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEnvironment[0:len((*c.CallOptions).DeleteEnvironment):len((*c.CallOptions).DeleteEnvironment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -558,6 +563,7 @@
 
 func (c *environmentsGRPCClient) LookupEnvironmentHistory(ctx context.Context, req *cxpb.LookupEnvironmentHistoryRequest, opts ...gax.CallOption) *EnvironmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LookupEnvironmentHistory[0:len((*c.CallOptions).LookupEnvironmentHistory):len((*c.CallOptions).LookupEnvironmentHistory)], opts...)
 	it := &EnvironmentIterator{}
@@ -607,6 +613,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "environment", url.QueryEscape(req.GetEnvironment())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunContinuousTest[0:len((*c.CallOptions).RunContinuousTest):len((*c.CallOptions).RunContinuousTest)], opts...)
 	var resp *longrunningpb.Operation
@@ -625,6 +632,7 @@
 
 func (c *environmentsGRPCClient) ListContinuousTestResults(ctx context.Context, req *cxpb.ListContinuousTestResultsRequest, opts ...gax.CallOption) *ContinuousTestResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListContinuousTestResults[0:len((*c.CallOptions).ListContinuousTestResults):len((*c.CallOptions).ListContinuousTestResults)], opts...)
 	it := &ContinuousTestResultIterator{}
@@ -674,6 +682,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "environment", url.QueryEscape(req.GetEnvironment())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeployFlow[0:len((*c.CallOptions).DeployFlow):len((*c.CallOptions).DeployFlow)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/dialogflow/cx/apiv3beta1/experiments_client.go b/dialogflow/cx/apiv3beta1/experiments_client.go
index 279b608..1f2be90 100644
--- a/dialogflow/cx/apiv3beta1/experiments_client.go
+++ b/dialogflow/cx/apiv3beta1/experiments_client.go
@@ -297,7 +297,7 @@
 // use by Google-written clients.
 func (c *experimentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -309,6 +309,7 @@
 
 func (c *experimentsGRPCClient) ListExperiments(ctx context.Context, req *cxpb.ListExperimentsRequest, opts ...gax.CallOption) *ExperimentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListExperiments[0:len((*c.CallOptions).ListExperiments):len((*c.CallOptions).ListExperiments)], opts...)
 	it := &ExperimentIterator{}
@@ -358,6 +359,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetExperiment[0:len((*c.CallOptions).GetExperiment):len((*c.CallOptions).GetExperiment)], opts...)
 	var resp *cxpb.Experiment
@@ -379,6 +381,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateExperiment[0:len((*c.CallOptions).CreateExperiment):len((*c.CallOptions).CreateExperiment)], opts...)
 	var resp *cxpb.Experiment
@@ -400,6 +403,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "experiment.name", url.QueryEscape(req.GetExperiment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateExperiment[0:len((*c.CallOptions).UpdateExperiment):len((*c.CallOptions).UpdateExperiment)], opts...)
 	var resp *cxpb.Experiment
@@ -421,6 +425,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteExperiment[0:len((*c.CallOptions).DeleteExperiment):len((*c.CallOptions).DeleteExperiment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -438,6 +443,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartExperiment[0:len((*c.CallOptions).StartExperiment):len((*c.CallOptions).StartExperiment)], opts...)
 	var resp *cxpb.Experiment
@@ -459,6 +465,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StopExperiment[0:len((*c.CallOptions).StopExperiment):len((*c.CallOptions).StopExperiment)], opts...)
 	var resp *cxpb.Experiment
diff --git a/dialogflow/cx/apiv3beta1/flows_client.go b/dialogflow/cx/apiv3beta1/flows_client.go
index 560eb3c..f202196 100644
--- a/dialogflow/cx/apiv3beta1/flows_client.go
+++ b/dialogflow/cx/apiv3beta1/flows_client.go
@@ -446,7 +446,7 @@
 // use by Google-written clients.
 func (c *flowsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -463,6 +463,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateFlow[0:len((*c.CallOptions).CreateFlow):len((*c.CallOptions).CreateFlow)], opts...)
 	var resp *cxpb.Flow
@@ -484,6 +485,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteFlow[0:len((*c.CallOptions).DeleteFlow):len((*c.CallOptions).DeleteFlow)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -496,6 +498,7 @@
 
 func (c *flowsGRPCClient) ListFlows(ctx context.Context, req *cxpb.ListFlowsRequest, opts ...gax.CallOption) *FlowIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFlows[0:len((*c.CallOptions).ListFlows):len((*c.CallOptions).ListFlows)], opts...)
 	it := &FlowIterator{}
@@ -545,6 +548,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFlow[0:len((*c.CallOptions).GetFlow):len((*c.CallOptions).GetFlow)], opts...)
 	var resp *cxpb.Flow
@@ -566,6 +570,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "flow.name", url.QueryEscape(req.GetFlow().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFlow[0:len((*c.CallOptions).UpdateFlow):len((*c.CallOptions).UpdateFlow)], opts...)
 	var resp *cxpb.Flow
@@ -587,6 +592,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TrainFlow[0:len((*c.CallOptions).TrainFlow):len((*c.CallOptions).TrainFlow)], opts...)
 	var resp *longrunningpb.Operation
@@ -610,6 +616,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ValidateFlow[0:len((*c.CallOptions).ValidateFlow):len((*c.CallOptions).ValidateFlow)], opts...)
 	var resp *cxpb.FlowValidationResult
@@ -631,6 +638,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFlowValidationResult[0:len((*c.CallOptions).GetFlowValidationResult):len((*c.CallOptions).GetFlowValidationResult)], opts...)
 	var resp *cxpb.FlowValidationResult
@@ -652,6 +660,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportFlow[0:len((*c.CallOptions).ImportFlow):len((*c.CallOptions).ImportFlow)], opts...)
 	var resp *longrunningpb.Operation
@@ -675,6 +684,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportFlow[0:len((*c.CallOptions).ExportFlow):len((*c.CallOptions).ExportFlow)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/dialogflow/cx/apiv3beta1/intents_client.go b/dialogflow/cx/apiv3beta1/intents_client.go
index 7d3d84e..9c8b11d 100644
--- a/dialogflow/cx/apiv3beta1/intents_client.go
+++ b/dialogflow/cx/apiv3beta1/intents_client.go
@@ -271,7 +271,7 @@
 // use by Google-written clients.
 func (c *intentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -283,6 +283,7 @@
 
 func (c *intentsGRPCClient) ListIntents(ctx context.Context, req *cxpb.ListIntentsRequest, opts ...gax.CallOption) *IntentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListIntents[0:len((*c.CallOptions).ListIntents):len((*c.CallOptions).ListIntents)], opts...)
 	it := &IntentIterator{}
@@ -332,6 +333,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIntent[0:len((*c.CallOptions).GetIntent):len((*c.CallOptions).GetIntent)], opts...)
 	var resp *cxpb.Intent
@@ -353,6 +355,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateIntent[0:len((*c.CallOptions).CreateIntent):len((*c.CallOptions).CreateIntent)], opts...)
 	var resp *cxpb.Intent
@@ -374,6 +377,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "intent.name", url.QueryEscape(req.GetIntent().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateIntent[0:len((*c.CallOptions).UpdateIntent):len((*c.CallOptions).UpdateIntent)], opts...)
 	var resp *cxpb.Intent
@@ -395,6 +399,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteIntent[0:len((*c.CallOptions).DeleteIntent):len((*c.CallOptions).DeleteIntent)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3beta1/pages_client.go b/dialogflow/cx/apiv3beta1/pages_client.go
index 8965753..764d10a 100644
--- a/dialogflow/cx/apiv3beta1/pages_client.go
+++ b/dialogflow/cx/apiv3beta1/pages_client.go
@@ -259,7 +259,7 @@
 // use by Google-written clients.
 func (c *pagesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -271,6 +271,7 @@
 
 func (c *pagesGRPCClient) ListPages(ctx context.Context, req *cxpb.ListPagesRequest, opts ...gax.CallOption) *PageIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPages[0:len((*c.CallOptions).ListPages):len((*c.CallOptions).ListPages)], opts...)
 	it := &PageIterator{}
@@ -320,6 +321,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPage[0:len((*c.CallOptions).GetPage):len((*c.CallOptions).GetPage)], opts...)
 	var resp *cxpb.Page
@@ -341,6 +343,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreatePage[0:len((*c.CallOptions).CreatePage):len((*c.CallOptions).CreatePage)], opts...)
 	var resp *cxpb.Page
@@ -362,6 +365,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "page.name", url.QueryEscape(req.GetPage().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdatePage[0:len((*c.CallOptions).UpdatePage):len((*c.CallOptions).UpdatePage)], opts...)
 	var resp *cxpb.Page
@@ -383,6 +387,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePage[0:len((*c.CallOptions).DeletePage):len((*c.CallOptions).DeletePage)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3beta1/security_settings_client.go b/dialogflow/cx/apiv3beta1/security_settings_client.go
index cf9e02e..467eac9 100644
--- a/dialogflow/cx/apiv3beta1/security_settings_client.go
+++ b/dialogflow/cx/apiv3beta1/security_settings_client.go
@@ -260,7 +260,7 @@
 // use by Google-written clients.
 func (c *securitySettingsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -277,6 +277,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSecuritySettings[0:len((*c.CallOptions).CreateSecuritySettings):len((*c.CallOptions).CreateSecuritySettings)], opts...)
 	var resp *cxpb.SecuritySettings
@@ -298,6 +299,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSecuritySettings[0:len((*c.CallOptions).GetSecuritySettings):len((*c.CallOptions).GetSecuritySettings)], opts...)
 	var resp *cxpb.SecuritySettings
@@ -319,6 +321,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "security_settings.name", url.QueryEscape(req.GetSecuritySettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSecuritySettings[0:len((*c.CallOptions).UpdateSecuritySettings):len((*c.CallOptions).UpdateSecuritySettings)], opts...)
 	var resp *cxpb.SecuritySettings
@@ -335,6 +338,7 @@
 
 func (c *securitySettingsGRPCClient) ListSecuritySettings(ctx context.Context, req *cxpb.ListSecuritySettingsRequest, opts ...gax.CallOption) *SecuritySettingsIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSecuritySettings[0:len((*c.CallOptions).ListSecuritySettings):len((*c.CallOptions).ListSecuritySettings)], opts...)
 	it := &SecuritySettingsIterator{}
@@ -384,6 +388,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSecuritySettings[0:len((*c.CallOptions).DeleteSecuritySettings):len((*c.CallOptions).DeleteSecuritySettings)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3beta1/session_entity_types_client.go b/dialogflow/cx/apiv3beta1/session_entity_types_client.go
index 141e852..c8aa67c 100644
--- a/dialogflow/cx/apiv3beta1/session_entity_types_client.go
+++ b/dialogflow/cx/apiv3beta1/session_entity_types_client.go
@@ -259,7 +259,7 @@
 // use by Google-written clients.
 func (c *sessionEntityTypesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -271,6 +271,7 @@
 
 func (c *sessionEntityTypesGRPCClient) ListSessionEntityTypes(ctx context.Context, req *cxpb.ListSessionEntityTypesRequest, opts ...gax.CallOption) *SessionEntityTypeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSessionEntityTypes[0:len((*c.CallOptions).ListSessionEntityTypes):len((*c.CallOptions).ListSessionEntityTypes)], opts...)
 	it := &SessionEntityTypeIterator{}
@@ -320,6 +321,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSessionEntityType[0:len((*c.CallOptions).GetSessionEntityType):len((*c.CallOptions).GetSessionEntityType)], opts...)
 	var resp *cxpb.SessionEntityType
@@ -341,6 +343,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSessionEntityType[0:len((*c.CallOptions).CreateSessionEntityType):len((*c.CallOptions).CreateSessionEntityType)], opts...)
 	var resp *cxpb.SessionEntityType
@@ -362,6 +365,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session_entity_type.name", url.QueryEscape(req.GetSessionEntityType().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSessionEntityType[0:len((*c.CallOptions).UpdateSessionEntityType):len((*c.CallOptions).UpdateSessionEntityType)], opts...)
 	var resp *cxpb.SessionEntityType
@@ -383,6 +387,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSessionEntityType[0:len((*c.CallOptions).DeleteSessionEntityType):len((*c.CallOptions).DeleteSessionEntityType)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3beta1/sessions_client.go b/dialogflow/cx/apiv3beta1/sessions_client.go
index 2262b02..90e97bf 100644
--- a/dialogflow/cx/apiv3beta1/sessions_client.go
+++ b/dialogflow/cx/apiv3beta1/sessions_client.go
@@ -249,7 +249,7 @@
 // use by Google-written clients.
 func (c *sessionsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -266,6 +266,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DetectIntent[0:len((*c.CallOptions).DetectIntent):len((*c.CallOptions).DetectIntent)], opts...)
 	var resp *cxpb.DetectIntentResponse
@@ -302,6 +303,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MatchIntent[0:len((*c.CallOptions).MatchIntent):len((*c.CallOptions).MatchIntent)], opts...)
 	var resp *cxpb.MatchIntentResponse
@@ -323,6 +325,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "match_intent_request.session", url.QueryEscape(req.GetMatchIntentRequest().GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FulfillIntent[0:len((*c.CallOptions).FulfillIntent):len((*c.CallOptions).FulfillIntent)], opts...)
 	var resp *cxpb.FulfillIntentResponse
diff --git a/dialogflow/cx/apiv3beta1/test_cases_client.go b/dialogflow/cx/apiv3beta1/test_cases_client.go
index b42e989..d60e48e 100644
--- a/dialogflow/cx/apiv3beta1/test_cases_client.go
+++ b/dialogflow/cx/apiv3beta1/test_cases_client.go
@@ -474,7 +474,7 @@
 // use by Google-written clients.
 func (c *testCasesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -486,6 +486,7 @@
 
 func (c *testCasesGRPCClient) ListTestCases(ctx context.Context, req *cxpb.ListTestCasesRequest, opts ...gax.CallOption) *TestCaseIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTestCases[0:len((*c.CallOptions).ListTestCases):len((*c.CallOptions).ListTestCases)], opts...)
 	it := &TestCaseIterator{}
@@ -535,6 +536,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchDeleteTestCases[0:len((*c.CallOptions).BatchDeleteTestCases):len((*c.CallOptions).BatchDeleteTestCases)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -552,6 +554,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTestCase[0:len((*c.CallOptions).GetTestCase):len((*c.CallOptions).GetTestCase)], opts...)
 	var resp *cxpb.TestCase
@@ -573,6 +576,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTestCase[0:len((*c.CallOptions).CreateTestCase):len((*c.CallOptions).CreateTestCase)], opts...)
 	var resp *cxpb.TestCase
@@ -594,6 +598,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "test_case.name", url.QueryEscape(req.GetTestCase().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTestCase[0:len((*c.CallOptions).UpdateTestCase):len((*c.CallOptions).UpdateTestCase)], opts...)
 	var resp *cxpb.TestCase
@@ -615,6 +620,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunTestCase[0:len((*c.CallOptions).RunTestCase):len((*c.CallOptions).RunTestCase)], opts...)
 	var resp *longrunningpb.Operation
@@ -638,6 +644,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchRunTestCases[0:len((*c.CallOptions).BatchRunTestCases):len((*c.CallOptions).BatchRunTestCases)], opts...)
 	var resp *longrunningpb.Operation
@@ -661,6 +668,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "agent", url.QueryEscape(req.GetAgent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CalculateCoverage[0:len((*c.CallOptions).CalculateCoverage):len((*c.CallOptions).CalculateCoverage)], opts...)
 	var resp *cxpb.CalculateCoverageResponse
@@ -682,6 +690,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportTestCases[0:len((*c.CallOptions).ImportTestCases):len((*c.CallOptions).ImportTestCases)], opts...)
 	var resp *longrunningpb.Operation
@@ -705,6 +714,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportTestCases[0:len((*c.CallOptions).ExportTestCases):len((*c.CallOptions).ExportTestCases)], opts...)
 	var resp *longrunningpb.Operation
@@ -723,6 +733,7 @@
 
 func (c *testCasesGRPCClient) ListTestCaseResults(ctx context.Context, req *cxpb.ListTestCaseResultsRequest, opts ...gax.CallOption) *TestCaseResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTestCaseResults[0:len((*c.CallOptions).ListTestCaseResults):len((*c.CallOptions).ListTestCaseResults)], opts...)
 	it := &TestCaseResultIterator{}
@@ -772,6 +783,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTestCaseResult[0:len((*c.CallOptions).GetTestCaseResult):len((*c.CallOptions).GetTestCaseResult)], opts...)
 	var resp *cxpb.TestCaseResult
diff --git a/dialogflow/cx/apiv3beta1/transition_route_groups_client.go b/dialogflow/cx/apiv3beta1/transition_route_groups_client.go
index 77348a3..6369d32 100644
--- a/dialogflow/cx/apiv3beta1/transition_route_groups_client.go
+++ b/dialogflow/cx/apiv3beta1/transition_route_groups_client.go
@@ -271,7 +271,7 @@
 // use by Google-written clients.
 func (c *transitionRouteGroupsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -283,6 +283,7 @@
 
 func (c *transitionRouteGroupsGRPCClient) ListTransitionRouteGroups(ctx context.Context, req *cxpb.ListTransitionRouteGroupsRequest, opts ...gax.CallOption) *TransitionRouteGroupIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTransitionRouteGroups[0:len((*c.CallOptions).ListTransitionRouteGroups):len((*c.CallOptions).ListTransitionRouteGroups)], opts...)
 	it := &TransitionRouteGroupIterator{}
@@ -332,6 +333,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTransitionRouteGroup[0:len((*c.CallOptions).GetTransitionRouteGroup):len((*c.CallOptions).GetTransitionRouteGroup)], opts...)
 	var resp *cxpb.TransitionRouteGroup
@@ -353,6 +355,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTransitionRouteGroup[0:len((*c.CallOptions).CreateTransitionRouteGroup):len((*c.CallOptions).CreateTransitionRouteGroup)], opts...)
 	var resp *cxpb.TransitionRouteGroup
@@ -374,6 +377,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "transition_route_group.name", url.QueryEscape(req.GetTransitionRouteGroup().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTransitionRouteGroup[0:len((*c.CallOptions).UpdateTransitionRouteGroup):len((*c.CallOptions).UpdateTransitionRouteGroup)], opts...)
 	var resp *cxpb.TransitionRouteGroup
@@ -395,6 +399,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTransitionRouteGroup[0:len((*c.CallOptions).DeleteTransitionRouteGroup):len((*c.CallOptions).DeleteTransitionRouteGroup)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dialogflow/cx/apiv3beta1/version.go b/dialogflow/cx/apiv3beta1/version.go
new file mode 100644
index 0000000..b959cb6
--- /dev/null
+++ b/dialogflow/cx/apiv3beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package cx
+
+import "cloud.google.com/go/dialogflow/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/dialogflow/cx/apiv3beta1/versions_client.go b/dialogflow/cx/apiv3beta1/versions_client.go
index 04174af..87ebda6 100644
--- a/dialogflow/cx/apiv3beta1/versions_client.go
+++ b/dialogflow/cx/apiv3beta1/versions_client.go
@@ -352,7 +352,7 @@
 // use by Google-written clients.
 func (c *versionsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -364,6 +364,7 @@
 
 func (c *versionsGRPCClient) ListVersions(ctx context.Context, req *cxpb.ListVersionsRequest, opts ...gax.CallOption) *VersionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListVersions[0:len((*c.CallOptions).ListVersions):len((*c.CallOptions).ListVersions)], opts...)
 	it := &VersionIterator{}
@@ -413,6 +414,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetVersion[0:len((*c.CallOptions).GetVersion):len((*c.CallOptions).GetVersion)], opts...)
 	var resp *cxpb.Version
@@ -434,6 +436,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateVersion[0:len((*c.CallOptions).CreateVersion):len((*c.CallOptions).CreateVersion)], opts...)
 	var resp *longrunningpb.Operation
@@ -457,6 +460,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "version.name", url.QueryEscape(req.GetVersion().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateVersion[0:len((*c.CallOptions).UpdateVersion):len((*c.CallOptions).UpdateVersion)], opts...)
 	var resp *cxpb.Version
@@ -478,6 +482,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteVersion[0:len((*c.CallOptions).DeleteVersion):len((*c.CallOptions).DeleteVersion)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -495,6 +500,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LoadVersion[0:len((*c.CallOptions).LoadVersion):len((*c.CallOptions).LoadVersion)], opts...)
 	var resp *longrunningpb.Operation
@@ -518,6 +524,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "base_version", url.QueryEscape(req.GetBaseVersion())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CompareVersions[0:len((*c.CallOptions).CompareVersions):len((*c.CallOptions).CompareVersions)], opts...)
 	var resp *cxpb.CompareVersionsResponse
diff --git a/dialogflow/cx/apiv3beta1/webhooks_client.go b/dialogflow/cx/apiv3beta1/webhooks_client.go
index 7dec040..2a4a1b2 100644
--- a/dialogflow/cx/apiv3beta1/webhooks_client.go
+++ b/dialogflow/cx/apiv3beta1/webhooks_client.go
@@ -259,7 +259,7 @@
 // use by Google-written clients.
 func (c *webhooksGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -271,6 +271,7 @@
 
 func (c *webhooksGRPCClient) ListWebhooks(ctx context.Context, req *cxpb.ListWebhooksRequest, opts ...gax.CallOption) *WebhookIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListWebhooks[0:len((*c.CallOptions).ListWebhooks):len((*c.CallOptions).ListWebhooks)], opts...)
 	it := &WebhookIterator{}
@@ -320,6 +321,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetWebhook[0:len((*c.CallOptions).GetWebhook):len((*c.CallOptions).GetWebhook)], opts...)
 	var resp *cxpb.Webhook
@@ -341,6 +343,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateWebhook[0:len((*c.CallOptions).CreateWebhook):len((*c.CallOptions).CreateWebhook)], opts...)
 	var resp *cxpb.Webhook
@@ -362,6 +365,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "webhook.name", url.QueryEscape(req.GetWebhook().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateWebhook[0:len((*c.CallOptions).UpdateWebhook):len((*c.CallOptions).UpdateWebhook)], opts...)
 	var resp *cxpb.Webhook
@@ -383,6 +387,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteWebhook[0:len((*c.CallOptions).DeleteWebhook):len((*c.CallOptions).DeleteWebhook)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dlp/apiv2/dlp_client.go b/dlp/apiv2/dlp_client.go
index 9ae2fa5..7b9fa78 100644
--- a/dlp/apiv2/dlp_client.go
+++ b/dlp/apiv2/dlp_client.go
@@ -762,7 +762,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -779,6 +779,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).InspectContent[0:len((*c.CallOptions).InspectContent):len((*c.CallOptions).InspectContent)], opts...)
 	var resp *dlppb.InspectContentResponse
@@ -800,6 +801,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RedactImage[0:len((*c.CallOptions).RedactImage):len((*c.CallOptions).RedactImage)], opts...)
 	var resp *dlppb.RedactImageResponse
@@ -821,6 +823,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeidentifyContent[0:len((*c.CallOptions).DeidentifyContent):len((*c.CallOptions).DeidentifyContent)], opts...)
 	var resp *dlppb.DeidentifyContentResponse
@@ -842,6 +845,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReidentifyContent[0:len((*c.CallOptions).ReidentifyContent):len((*c.CallOptions).ReidentifyContent)], opts...)
 	var resp *dlppb.ReidentifyContentResponse
@@ -863,6 +867,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInfoTypes[0:len((*c.CallOptions).ListInfoTypes):len((*c.CallOptions).ListInfoTypes)], opts...)
 	var resp *dlppb.ListInfoTypesResponse
@@ -884,6 +889,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateInspectTemplate[0:len((*c.CallOptions).CreateInspectTemplate):len((*c.CallOptions).CreateInspectTemplate)], opts...)
 	var resp *dlppb.InspectTemplate
@@ -905,6 +911,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateInspectTemplate[0:len((*c.CallOptions).UpdateInspectTemplate):len((*c.CallOptions).UpdateInspectTemplate)], opts...)
 	var resp *dlppb.InspectTemplate
@@ -926,6 +933,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInspectTemplate[0:len((*c.CallOptions).GetInspectTemplate):len((*c.CallOptions).GetInspectTemplate)], opts...)
 	var resp *dlppb.InspectTemplate
@@ -942,6 +950,7 @@
 
 func (c *gRPCClient) ListInspectTemplates(ctx context.Context, req *dlppb.ListInspectTemplatesRequest, opts ...gax.CallOption) *InspectTemplateIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInspectTemplates[0:len((*c.CallOptions).ListInspectTemplates):len((*c.CallOptions).ListInspectTemplates)], opts...)
 	it := &InspectTemplateIterator{}
@@ -991,6 +1000,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteInspectTemplate[0:len((*c.CallOptions).DeleteInspectTemplate):len((*c.CallOptions).DeleteInspectTemplate)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1008,6 +1018,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDeidentifyTemplate[0:len((*c.CallOptions).CreateDeidentifyTemplate):len((*c.CallOptions).CreateDeidentifyTemplate)], opts...)
 	var resp *dlppb.DeidentifyTemplate
@@ -1029,6 +1040,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDeidentifyTemplate[0:len((*c.CallOptions).UpdateDeidentifyTemplate):len((*c.CallOptions).UpdateDeidentifyTemplate)], opts...)
 	var resp *dlppb.DeidentifyTemplate
@@ -1050,6 +1062,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDeidentifyTemplate[0:len((*c.CallOptions).GetDeidentifyTemplate):len((*c.CallOptions).GetDeidentifyTemplate)], opts...)
 	var resp *dlppb.DeidentifyTemplate
@@ -1066,6 +1079,7 @@
 
 func (c *gRPCClient) ListDeidentifyTemplates(ctx context.Context, req *dlppb.ListDeidentifyTemplatesRequest, opts ...gax.CallOption) *DeidentifyTemplateIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDeidentifyTemplates[0:len((*c.CallOptions).ListDeidentifyTemplates):len((*c.CallOptions).ListDeidentifyTemplates)], opts...)
 	it := &DeidentifyTemplateIterator{}
@@ -1115,6 +1129,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDeidentifyTemplate[0:len((*c.CallOptions).DeleteDeidentifyTemplate):len((*c.CallOptions).DeleteDeidentifyTemplate)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1132,6 +1147,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateJobTrigger[0:len((*c.CallOptions).CreateJobTrigger):len((*c.CallOptions).CreateJobTrigger)], opts...)
 	var resp *dlppb.JobTrigger
@@ -1153,6 +1169,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateJobTrigger[0:len((*c.CallOptions).UpdateJobTrigger):len((*c.CallOptions).UpdateJobTrigger)], opts...)
 	var resp *dlppb.JobTrigger
@@ -1174,6 +1191,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).HybridInspectJobTrigger[0:len((*c.CallOptions).HybridInspectJobTrigger):len((*c.CallOptions).HybridInspectJobTrigger)], opts...)
 	var resp *dlppb.HybridInspectResponse
@@ -1195,6 +1213,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJobTrigger[0:len((*c.CallOptions).GetJobTrigger):len((*c.CallOptions).GetJobTrigger)], opts...)
 	var resp *dlppb.JobTrigger
@@ -1211,6 +1230,7 @@
 
 func (c *gRPCClient) ListJobTriggers(ctx context.Context, req *dlppb.ListJobTriggersRequest, opts ...gax.CallOption) *JobTriggerIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListJobTriggers[0:len((*c.CallOptions).ListJobTriggers):len((*c.CallOptions).ListJobTriggers)], opts...)
 	it := &JobTriggerIterator{}
@@ -1260,6 +1280,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteJobTrigger[0:len((*c.CallOptions).DeleteJobTrigger):len((*c.CallOptions).DeleteJobTrigger)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1277,6 +1298,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ActivateJobTrigger[0:len((*c.CallOptions).ActivateJobTrigger):len((*c.CallOptions).ActivateJobTrigger)], opts...)
 	var resp *dlppb.DlpJob
@@ -1298,6 +1320,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDlpJob[0:len((*c.CallOptions).CreateDlpJob):len((*c.CallOptions).CreateDlpJob)], opts...)
 	var resp *dlppb.DlpJob
@@ -1314,6 +1337,7 @@
 
 func (c *gRPCClient) ListDlpJobs(ctx context.Context, req *dlppb.ListDlpJobsRequest, opts ...gax.CallOption) *DlpJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDlpJobs[0:len((*c.CallOptions).ListDlpJobs):len((*c.CallOptions).ListDlpJobs)], opts...)
 	it := &DlpJobIterator{}
@@ -1363,6 +1387,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDlpJob[0:len((*c.CallOptions).GetDlpJob):len((*c.CallOptions).GetDlpJob)], opts...)
 	var resp *dlppb.DlpJob
@@ -1384,6 +1409,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDlpJob[0:len((*c.CallOptions).DeleteDlpJob):len((*c.CallOptions).DeleteDlpJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1401,6 +1427,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelDlpJob[0:len((*c.CallOptions).CancelDlpJob):len((*c.CallOptions).CancelDlpJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1418,6 +1445,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateStoredInfoType[0:len((*c.CallOptions).CreateStoredInfoType):len((*c.CallOptions).CreateStoredInfoType)], opts...)
 	var resp *dlppb.StoredInfoType
@@ -1439,6 +1467,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateStoredInfoType[0:len((*c.CallOptions).UpdateStoredInfoType):len((*c.CallOptions).UpdateStoredInfoType)], opts...)
 	var resp *dlppb.StoredInfoType
@@ -1460,6 +1489,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetStoredInfoType[0:len((*c.CallOptions).GetStoredInfoType):len((*c.CallOptions).GetStoredInfoType)], opts...)
 	var resp *dlppb.StoredInfoType
@@ -1476,6 +1506,7 @@
 
 func (c *gRPCClient) ListStoredInfoTypes(ctx context.Context, req *dlppb.ListStoredInfoTypesRequest, opts ...gax.CallOption) *StoredInfoTypeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListStoredInfoTypes[0:len((*c.CallOptions).ListStoredInfoTypes):len((*c.CallOptions).ListStoredInfoTypes)], opts...)
 	it := &StoredInfoTypeIterator{}
@@ -1525,6 +1556,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteStoredInfoType[0:len((*c.CallOptions).DeleteStoredInfoType):len((*c.CallOptions).DeleteStoredInfoType)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1542,6 +1574,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).HybridInspectDlpJob[0:len((*c.CallOptions).HybridInspectDlpJob):len((*c.CallOptions).HybridInspectDlpJob)], opts...)
 	var resp *dlppb.HybridInspectResponse
@@ -1563,6 +1596,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FinishDlpJob[0:len((*c.CallOptions).FinishDlpJob):len((*c.CallOptions).FinishDlpJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/dlp/apiv2/doc.go b/dlp/apiv2/doc.go
index e700b34..8a74395 100644
--- a/dlp/apiv2/doc.go
+++ b/dlp/apiv2/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/dlp/apiv2/version.go b/dlp/apiv2/version.go
new file mode 100644
index 0000000..266194a
--- /dev/null
+++ b/dlp/apiv2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package dlp
+
+import "cloud.google.com/go/dlp/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/documentai/apiv1/doc.go b/documentai/apiv1/doc.go
index dce3471..52d742f 100644
--- a/documentai/apiv1/doc.go
+++ b/documentai/apiv1/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/documentai/apiv1/document_processor_client.go b/documentai/apiv1/document_processor_client.go
index bb83cfe..72bb856 100644
--- a/documentai/apiv1/document_processor_client.go
+++ b/documentai/apiv1/document_processor_client.go
@@ -270,7 +270,7 @@
 // use by Google-written clients.
 func (c *documentProcessorGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -287,6 +287,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ProcessDocument[0:len((*c.CallOptions).ProcessDocument):len((*c.CallOptions).ProcessDocument)], opts...)
 	var resp *documentaipb.ProcessResponse
@@ -308,6 +309,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchProcessDocuments[0:len((*c.CallOptions).BatchProcessDocuments):len((*c.CallOptions).BatchProcessDocuments)], opts...)
 	var resp *longrunningpb.Operation
@@ -331,6 +333,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "human_review_config", url.QueryEscape(req.GetHumanReviewConfig())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReviewDocument[0:len((*c.CallOptions).ReviewDocument):len((*c.CallOptions).ReviewDocument)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/documentai/apiv1/version.go b/documentai/apiv1/version.go
new file mode 100644
index 0000000..3faf6a7
--- /dev/null
+++ b/documentai/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package documentai
+
+import "cloud.google.com/go/documentai/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/documentai/apiv1beta3/doc.go b/documentai/apiv1beta3/doc.go
index 3520e7d..1792fd1 100644
--- a/documentai/apiv1beta3/doc.go
+++ b/documentai/apiv1beta3/doc.go
@@ -88,7 +88,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/documentai/apiv1beta3/document_processor_client.go b/documentai/apiv1beta3/document_processor_client.go
index 221cc6c..c5d7d4f 100644
--- a/documentai/apiv1beta3/document_processor_client.go
+++ b/documentai/apiv1beta3/document_processor_client.go
@@ -343,7 +343,7 @@
 // use by Google-written clients.
 func (c *documentProcessorGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -360,6 +360,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ProcessDocument[0:len((*c.CallOptions).ProcessDocument):len((*c.CallOptions).ProcessDocument)], opts...)
 	var resp *documentaipb.ProcessResponse
@@ -381,6 +382,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchProcessDocuments[0:len((*c.CallOptions).BatchProcessDocuments):len((*c.CallOptions).BatchProcessDocuments)], opts...)
 	var resp *longrunningpb.Operation
@@ -399,6 +401,7 @@
 
 func (c *documentProcessorGRPCClient) FetchProcessorTypes(ctx context.Context, req *documentaipb.FetchProcessorTypesRequest, opts ...gax.CallOption) (*documentaipb.FetchProcessorTypesResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FetchProcessorTypes[0:len((*c.CallOptions).FetchProcessorTypes):len((*c.CallOptions).FetchProcessorTypes)], opts...)
 	var resp *documentaipb.FetchProcessorTypesResponse
@@ -415,6 +418,7 @@
 
 func (c *documentProcessorGRPCClient) ListProcessors(ctx context.Context, req *documentaipb.ListProcessorsRequest, opts ...gax.CallOption) *ProcessorIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListProcessors[0:len((*c.CallOptions).ListProcessors):len((*c.CallOptions).ListProcessors)], opts...)
 	it := &ProcessorIterator{}
@@ -459,6 +463,7 @@
 
 func (c *documentProcessorGRPCClient) CreateProcessor(ctx context.Context, req *documentaipb.CreateProcessorRequest, opts ...gax.CallOption) (*documentaipb.Processor, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateProcessor[0:len((*c.CallOptions).CreateProcessor):len((*c.CallOptions).CreateProcessor)], opts...)
 	var resp *documentaipb.Processor
@@ -475,6 +480,7 @@
 
 func (c *documentProcessorGRPCClient) DeleteProcessor(ctx context.Context, req *documentaipb.DeleteProcessorRequest, opts ...gax.CallOption) (*DeleteProcessorOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteProcessor[0:len((*c.CallOptions).DeleteProcessor):len((*c.CallOptions).DeleteProcessor)], opts...)
 	var resp *longrunningpb.Operation
@@ -493,6 +499,7 @@
 
 func (c *documentProcessorGRPCClient) EnableProcessor(ctx context.Context, req *documentaipb.EnableProcessorRequest, opts ...gax.CallOption) (*EnableProcessorOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).EnableProcessor[0:len((*c.CallOptions).EnableProcessor):len((*c.CallOptions).EnableProcessor)], opts...)
 	var resp *longrunningpb.Operation
@@ -511,6 +518,7 @@
 
 func (c *documentProcessorGRPCClient) DisableProcessor(ctx context.Context, req *documentaipb.DisableProcessorRequest, opts ...gax.CallOption) (*DisableProcessorOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DisableProcessor[0:len((*c.CallOptions).DisableProcessor):len((*c.CallOptions).DisableProcessor)], opts...)
 	var resp *longrunningpb.Operation
@@ -534,6 +542,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "human_review_config", url.QueryEscape(req.GetHumanReviewConfig())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReviewDocument[0:len((*c.CallOptions).ReviewDocument):len((*c.CallOptions).ReviewDocument)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/documentai/apiv1beta3/version.go b/documentai/apiv1beta3/version.go
new file mode 100644
index 0000000..3faf6a7
--- /dev/null
+++ b/documentai/apiv1beta3/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package documentai
+
+import "cloud.google.com/go/documentai/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/domains/apiv1beta1/doc.go b/domains/apiv1beta1/doc.go
index 95f5400..273341b 100644
--- a/domains/apiv1beta1/doc.go
+++ b/domains/apiv1beta1/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/domains/apiv1beta1/domains_client.go b/domains/apiv1beta1/domains_client.go
index b3dcdf1..fad4d24 100644
--- a/domains/apiv1beta1/domains_client.go
+++ b/domains/apiv1beta1/domains_client.go
@@ -451,7 +451,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -463,6 +463,7 @@
 
 func (c *gRPCClient) SearchDomains(ctx context.Context, req *domainspb.SearchDomainsRequest, opts ...gax.CallOption) (*domainspb.SearchDomainsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchDomains[0:len((*c.CallOptions).SearchDomains):len((*c.CallOptions).SearchDomains)], opts...)
 	var resp *domainspb.SearchDomainsResponse
@@ -479,6 +480,7 @@
 
 func (c *gRPCClient) RetrieveRegisterParameters(ctx context.Context, req *domainspb.RetrieveRegisterParametersRequest, opts ...gax.CallOption) (*domainspb.RetrieveRegisterParametersResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RetrieveRegisterParameters[0:len((*c.CallOptions).RetrieveRegisterParameters):len((*c.CallOptions).RetrieveRegisterParameters)], opts...)
 	var resp *domainspb.RetrieveRegisterParametersResponse
@@ -495,6 +497,7 @@
 
 func (c *gRPCClient) RegisterDomain(ctx context.Context, req *domainspb.RegisterDomainRequest, opts ...gax.CallOption) (*RegisterDomainOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RegisterDomain[0:len((*c.CallOptions).RegisterDomain):len((*c.CallOptions).RegisterDomain)], opts...)
 	var resp *longrunningpb.Operation
@@ -513,6 +516,7 @@
 
 func (c *gRPCClient) RetrieveTransferParameters(ctx context.Context, req *domainspb.RetrieveTransferParametersRequest, opts ...gax.CallOption) (*domainspb.RetrieveTransferParametersResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RetrieveTransferParameters[0:len((*c.CallOptions).RetrieveTransferParameters):len((*c.CallOptions).RetrieveTransferParameters)], opts...)
 	var resp *domainspb.RetrieveTransferParametersResponse
@@ -529,6 +533,7 @@
 
 func (c *gRPCClient) TransferDomain(ctx context.Context, req *domainspb.TransferDomainRequest, opts ...gax.CallOption) (*TransferDomainOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TransferDomain[0:len((*c.CallOptions).TransferDomain):len((*c.CallOptions).TransferDomain)], opts...)
 	var resp *longrunningpb.Operation
@@ -547,6 +552,7 @@
 
 func (c *gRPCClient) ListRegistrations(ctx context.Context, req *domainspb.ListRegistrationsRequest, opts ...gax.CallOption) *RegistrationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListRegistrations[0:len((*c.CallOptions).ListRegistrations):len((*c.CallOptions).ListRegistrations)], opts...)
 	it := &RegistrationIterator{}
@@ -591,6 +597,7 @@
 
 func (c *gRPCClient) GetRegistration(ctx context.Context, req *domainspb.GetRegistrationRequest, opts ...gax.CallOption) (*domainspb.Registration, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetRegistration[0:len((*c.CallOptions).GetRegistration):len((*c.CallOptions).GetRegistration)], opts...)
 	var resp *domainspb.Registration
@@ -607,6 +614,7 @@
 
 func (c *gRPCClient) UpdateRegistration(ctx context.Context, req *domainspb.UpdateRegistrationRequest, opts ...gax.CallOption) (*UpdateRegistrationOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "registration.name", url.QueryEscape(req.GetRegistration().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateRegistration[0:len((*c.CallOptions).UpdateRegistration):len((*c.CallOptions).UpdateRegistration)], opts...)
 	var resp *longrunningpb.Operation
@@ -625,6 +633,7 @@
 
 func (c *gRPCClient) ConfigureManagementSettings(ctx context.Context, req *domainspb.ConfigureManagementSettingsRequest, opts ...gax.CallOption) (*ConfigureManagementSettingsOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "registration", url.QueryEscape(req.GetRegistration())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ConfigureManagementSettings[0:len((*c.CallOptions).ConfigureManagementSettings):len((*c.CallOptions).ConfigureManagementSettings)], opts...)
 	var resp *longrunningpb.Operation
@@ -643,6 +652,7 @@
 
 func (c *gRPCClient) ConfigureDnsSettings(ctx context.Context, req *domainspb.ConfigureDnsSettingsRequest, opts ...gax.CallOption) (*ConfigureDnsSettingsOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "registration", url.QueryEscape(req.GetRegistration())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ConfigureDnsSettings[0:len((*c.CallOptions).ConfigureDnsSettings):len((*c.CallOptions).ConfigureDnsSettings)], opts...)
 	var resp *longrunningpb.Operation
@@ -661,6 +671,7 @@
 
 func (c *gRPCClient) ConfigureContactSettings(ctx context.Context, req *domainspb.ConfigureContactSettingsRequest, opts ...gax.CallOption) (*ConfigureContactSettingsOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "registration", url.QueryEscape(req.GetRegistration())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ConfigureContactSettings[0:len((*c.CallOptions).ConfigureContactSettings):len((*c.CallOptions).ConfigureContactSettings)], opts...)
 	var resp *longrunningpb.Operation
@@ -679,6 +690,7 @@
 
 func (c *gRPCClient) ExportRegistration(ctx context.Context, req *domainspb.ExportRegistrationRequest, opts ...gax.CallOption) (*ExportRegistrationOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportRegistration[0:len((*c.CallOptions).ExportRegistration):len((*c.CallOptions).ExportRegistration)], opts...)
 	var resp *longrunningpb.Operation
@@ -697,6 +709,7 @@
 
 func (c *gRPCClient) DeleteRegistration(ctx context.Context, req *domainspb.DeleteRegistrationRequest, opts ...gax.CallOption) (*DeleteRegistrationOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteRegistration[0:len((*c.CallOptions).DeleteRegistration):len((*c.CallOptions).DeleteRegistration)], opts...)
 	var resp *longrunningpb.Operation
@@ -715,6 +728,7 @@
 
 func (c *gRPCClient) RetrieveAuthorizationCode(ctx context.Context, req *domainspb.RetrieveAuthorizationCodeRequest, opts ...gax.CallOption) (*domainspb.AuthorizationCode, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "registration", url.QueryEscape(req.GetRegistration())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RetrieveAuthorizationCode[0:len((*c.CallOptions).RetrieveAuthorizationCode):len((*c.CallOptions).RetrieveAuthorizationCode)], opts...)
 	var resp *domainspb.AuthorizationCode
@@ -731,6 +745,7 @@
 
 func (c *gRPCClient) ResetAuthorizationCode(ctx context.Context, req *domainspb.ResetAuthorizationCodeRequest, opts ...gax.CallOption) (*domainspb.AuthorizationCode, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "registration", url.QueryEscape(req.GetRegistration())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResetAuthorizationCode[0:len((*c.CallOptions).ResetAuthorizationCode):len((*c.CallOptions).ResetAuthorizationCode)], opts...)
 	var resp *domainspb.AuthorizationCode
diff --git a/domains/apiv1beta1/version.go b/domains/apiv1beta1/version.go
new file mode 100644
index 0000000..e33d445
--- /dev/null
+++ b/domains/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package domains
+
+import "cloud.google.com/go/domains/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/errorreporting/apiv1beta1/doc.go b/errorreporting/apiv1beta1/doc.go
index ac56eb2..12ddc8d 100644
--- a/errorreporting/apiv1beta1/doc.go
+++ b/errorreporting/apiv1beta1/doc.go
@@ -88,7 +88,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/errorreporting/apiv1beta1/error_group_client.go b/errorreporting/apiv1beta1/error_group_client.go
index 8711201..b00813c 100644
--- a/errorreporting/apiv1beta1/error_group_client.go
+++ b/errorreporting/apiv1beta1/error_group_client.go
@@ -206,7 +206,7 @@
 // use by Google-written clients.
 func (c *errorGroupGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -223,6 +223,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "group_name", url.QueryEscape(req.GetGroupName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGroup[0:len((*c.CallOptions).GetGroup):len((*c.CallOptions).GetGroup)], opts...)
 	var resp *clouderrorreportingpb.ErrorGroup
@@ -244,6 +245,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "group.name", url.QueryEscape(req.GetGroup().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGroup[0:len((*c.CallOptions).UpdateGroup):len((*c.CallOptions).UpdateGroup)], opts...)
 	var resp *clouderrorreportingpb.ErrorGroup
diff --git a/errorreporting/apiv1beta1/error_stats_client.go b/errorreporting/apiv1beta1/error_stats_client.go
index 6617d43..ad63f9f 100644
--- a/errorreporting/apiv1beta1/error_stats_client.go
+++ b/errorreporting/apiv1beta1/error_stats_client.go
@@ -228,7 +228,7 @@
 // use by Google-written clients.
 func (c *errorStatsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -240,6 +240,7 @@
 
 func (c *errorStatsGRPCClient) ListGroupStats(ctx context.Context, req *clouderrorreportingpb.ListGroupStatsRequest, opts ...gax.CallOption) *ErrorGroupStatsIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_name", url.QueryEscape(req.GetProjectName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGroupStats[0:len((*c.CallOptions).ListGroupStats):len((*c.CallOptions).ListGroupStats)], opts...)
 	it := &ErrorGroupStatsIterator{}
@@ -284,6 +285,7 @@
 
 func (c *errorStatsGRPCClient) ListEvents(ctx context.Context, req *clouderrorreportingpb.ListEventsRequest, opts ...gax.CallOption) *ErrorEventIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_name", url.QueryEscape(req.GetProjectName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEvents[0:len((*c.CallOptions).ListEvents):len((*c.CallOptions).ListEvents)], opts...)
 	it := &ErrorEventIterator{}
@@ -333,6 +335,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_name", url.QueryEscape(req.GetProjectName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEvents[0:len((*c.CallOptions).DeleteEvents):len((*c.CallOptions).DeleteEvents)], opts...)
 	var resp *clouderrorreportingpb.DeleteEventsResponse
diff --git a/errorreporting/apiv1beta1/report_errors_client.go b/errorreporting/apiv1beta1/report_errors_client.go
index 5287f8e..21f93d2 100644
--- a/errorreporting/apiv1beta1/report_errors_client.go
+++ b/errorreporting/apiv1beta1/report_errors_client.go
@@ -189,7 +189,7 @@
 // use by Google-written clients.
 func (c *reportErrorsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -206,6 +206,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_name", url.QueryEscape(req.GetProjectName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReportErrorEvent[0:len((*c.CallOptions).ReportErrorEvent):len((*c.CallOptions).ReportErrorEvent)], opts...)
 	var resp *clouderrorreportingpb.ReportErrorEventResponse
diff --git a/errorreporting/apiv1beta1/version.go b/errorreporting/apiv1beta1/version.go
new file mode 100644
index 0000000..ddd5e30
--- /dev/null
+++ b/errorreporting/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package errorreporting
+
+import "cloud.google.com/go/errorreporting/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/essentialcontacts/apiv1/doc.go b/essentialcontacts/apiv1/doc.go
index 55c2706..4271d8b 100644
--- a/essentialcontacts/apiv1/doc.go
+++ b/essentialcontacts/apiv1/doc.go
@@ -82,7 +82,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/essentialcontacts/apiv1/essential_contacts_client.go b/essentialcontacts/apiv1/essential_contacts_client.go
index 3387709..6351686 100644
--- a/essentialcontacts/apiv1/essential_contacts_client.go
+++ b/essentialcontacts/apiv1/essential_contacts_client.go
@@ -249,7 +249,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -266,6 +266,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateContact[0:len((*c.CallOptions).CreateContact):len((*c.CallOptions).CreateContact)], opts...)
 	var resp *essentialcontactspb.Contact
@@ -287,6 +288,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "contact.name", url.QueryEscape(req.GetContact().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateContact[0:len((*c.CallOptions).UpdateContact):len((*c.CallOptions).UpdateContact)], opts...)
 	var resp *essentialcontactspb.Contact
@@ -303,6 +305,7 @@
 
 func (c *gRPCClient) ListContacts(ctx context.Context, req *essentialcontactspb.ListContactsRequest, opts ...gax.CallOption) *ContactIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListContacts[0:len((*c.CallOptions).ListContacts):len((*c.CallOptions).ListContacts)], opts...)
 	it := &ContactIterator{}
@@ -352,6 +355,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetContact[0:len((*c.CallOptions).GetContact):len((*c.CallOptions).GetContact)], opts...)
 	var resp *essentialcontactspb.Contact
@@ -373,6 +377,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteContact[0:len((*c.CallOptions).DeleteContact):len((*c.CallOptions).DeleteContact)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -385,6 +390,7 @@
 
 func (c *gRPCClient) ComputeContacts(ctx context.Context, req *essentialcontactspb.ComputeContactsRequest, opts ...gax.CallOption) *ContactIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ComputeContacts[0:len((*c.CallOptions).ComputeContacts):len((*c.CallOptions).ComputeContacts)], opts...)
 	it := &ContactIterator{}
@@ -434,6 +440,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SendTestMessage[0:len((*c.CallOptions).SendTestMessage):len((*c.CallOptions).SendTestMessage)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/essentialcontacts/apiv1/version.go b/essentialcontacts/apiv1/version.go
new file mode 100644
index 0000000..37f4fce
--- /dev/null
+++ b/essentialcontacts/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package essentialcontacts
+
+import "cloud.google.com/go/essentialcontacts/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/eventarc/apiv1/doc.go b/eventarc/apiv1/doc.go
index c82872f..1111aa2 100644
--- a/eventarc/apiv1/doc.go
+++ b/eventarc/apiv1/doc.go
@@ -82,7 +82,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/eventarc/apiv1/eventarc_client.go b/eventarc/apiv1/eventarc_client.go
index b04898b..4ce142c 100644
--- a/eventarc/apiv1/eventarc_client.go
+++ b/eventarc/apiv1/eventarc_client.go
@@ -362,7 +362,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -374,6 +374,7 @@
 
 func (c *gRPCClient) GetTrigger(ctx context.Context, req *eventarcpb.GetTriggerRequest, opts ...gax.CallOption) (*eventarcpb.Trigger, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTrigger[0:len((*c.CallOptions).GetTrigger):len((*c.CallOptions).GetTrigger)], opts...)
 	var resp *eventarcpb.Trigger
@@ -390,6 +391,7 @@
 
 func (c *gRPCClient) ListTriggers(ctx context.Context, req *eventarcpb.ListTriggersRequest, opts ...gax.CallOption) *TriggerIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTriggers[0:len((*c.CallOptions).ListTriggers):len((*c.CallOptions).ListTriggers)], opts...)
 	it := &TriggerIterator{}
@@ -434,6 +436,7 @@
 
 func (c *gRPCClient) CreateTrigger(ctx context.Context, req *eventarcpb.CreateTriggerRequest, opts ...gax.CallOption) (*CreateTriggerOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTrigger[0:len((*c.CallOptions).CreateTrigger):len((*c.CallOptions).CreateTrigger)], opts...)
 	var resp *longrunningpb.Operation
@@ -452,6 +455,7 @@
 
 func (c *gRPCClient) UpdateTrigger(ctx context.Context, req *eventarcpb.UpdateTriggerRequest, opts ...gax.CallOption) (*UpdateTriggerOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "trigger.name", url.QueryEscape(req.GetTrigger().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTrigger[0:len((*c.CallOptions).UpdateTrigger):len((*c.CallOptions).UpdateTrigger)], opts...)
 	var resp *longrunningpb.Operation
@@ -470,6 +474,7 @@
 
 func (c *gRPCClient) DeleteTrigger(ctx context.Context, req *eventarcpb.DeleteTriggerRequest, opts ...gax.CallOption) (*DeleteTriggerOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTrigger[0:len((*c.CallOptions).DeleteTrigger):len((*c.CallOptions).DeleteTrigger)], opts...)
 	var resp *longrunningpb.Operation
@@ -488,6 +493,7 @@
 
 func (c *gRPCClient) GetChannel(ctx context.Context, req *eventarcpb.GetChannelRequest, opts ...gax.CallOption) (*eventarcpb.Channel, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetChannel[0:len((*c.CallOptions).GetChannel):len((*c.CallOptions).GetChannel)], opts...)
 	var resp *eventarcpb.Channel
@@ -504,6 +510,7 @@
 
 func (c *gRPCClient) ListChannels(ctx context.Context, req *eventarcpb.ListChannelsRequest, opts ...gax.CallOption) *ChannelIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListChannels[0:len((*c.CallOptions).ListChannels):len((*c.CallOptions).ListChannels)], opts...)
 	it := &ChannelIterator{}
@@ -548,6 +555,7 @@
 
 func (c *gRPCClient) CreateChannel(ctx context.Context, req *eventarcpb.CreateChannelRequest, opts ...gax.CallOption) (*CreateChannelOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateChannel[0:len((*c.CallOptions).CreateChannel):len((*c.CallOptions).CreateChannel)], opts...)
 	var resp *longrunningpb.Operation
@@ -566,6 +574,7 @@
 
 func (c *gRPCClient) UpdateChannel(ctx context.Context, req *eventarcpb.UpdateChannelRequest, opts ...gax.CallOption) (*UpdateChannelOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "channel.name", url.QueryEscape(req.GetChannel().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateChannel[0:len((*c.CallOptions).UpdateChannel):len((*c.CallOptions).UpdateChannel)], opts...)
 	var resp *longrunningpb.Operation
@@ -584,6 +593,7 @@
 
 func (c *gRPCClient) DeleteChannel(ctx context.Context, req *eventarcpb.DeleteChannelRequest, opts ...gax.CallOption) (*DeleteChannelOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteChannel[0:len((*c.CallOptions).DeleteChannel):len((*c.CallOptions).DeleteChannel)], opts...)
 	var resp *longrunningpb.Operation
@@ -602,6 +612,7 @@
 
 func (c *gRPCClient) GetChannelConnection(ctx context.Context, req *eventarcpb.GetChannelConnectionRequest, opts ...gax.CallOption) (*eventarcpb.ChannelConnection, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetChannelConnection[0:len((*c.CallOptions).GetChannelConnection):len((*c.CallOptions).GetChannelConnection)], opts...)
 	var resp *eventarcpb.ChannelConnection
@@ -618,6 +629,7 @@
 
 func (c *gRPCClient) ListChannelConnections(ctx context.Context, req *eventarcpb.ListChannelConnectionsRequest, opts ...gax.CallOption) *ChannelConnectionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListChannelConnections[0:len((*c.CallOptions).ListChannelConnections):len((*c.CallOptions).ListChannelConnections)], opts...)
 	it := &ChannelConnectionIterator{}
@@ -662,6 +674,7 @@
 
 func (c *gRPCClient) CreateChannelConnection(ctx context.Context, req *eventarcpb.CreateChannelConnectionRequest, opts ...gax.CallOption) (*CreateChannelConnectionOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateChannelConnection[0:len((*c.CallOptions).CreateChannelConnection):len((*c.CallOptions).CreateChannelConnection)], opts...)
 	var resp *longrunningpb.Operation
@@ -680,6 +693,7 @@
 
 func (c *gRPCClient) DeleteChannelConnection(ctx context.Context, req *eventarcpb.DeleteChannelConnectionRequest, opts ...gax.CallOption) (*DeleteChannelConnectionOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteChannelConnection[0:len((*c.CallOptions).DeleteChannelConnection):len((*c.CallOptions).DeleteChannelConnection)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/eventarc/apiv1/version.go b/eventarc/apiv1/version.go
new file mode 100644
index 0000000..c00edcd
--- /dev/null
+++ b/eventarc/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package eventarc
+
+import "cloud.google.com/go/eventarc/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/eventarc/publishing/apiv1/doc.go b/eventarc/publishing/apiv1/doc.go
index a5b84e5..db3a099 100644
--- a/eventarc/publishing/apiv1/doc.go
+++ b/eventarc/publishing/apiv1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/eventarc/publishing/apiv1/publisher_client.go b/eventarc/publishing/apiv1/publisher_client.go
index d38dc8d..69ffded 100644
--- a/eventarc/publishing/apiv1/publisher_client.go
+++ b/eventarc/publishing/apiv1/publisher_client.go
@@ -220,7 +220,7 @@
 // use by Google-written clients.
 func (c *publisherGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -237,6 +237,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "channel_connection", url.QueryEscape(req.GetChannelConnection())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PublishChannelConnectionEvents[0:len((*c.CallOptions).PublishChannelConnectionEvents):len((*c.CallOptions).PublishChannelConnectionEvents)], opts...)
 	var resp *publisherpb.PublishChannelConnectionEventsResponse
diff --git a/eventarc/publishing/apiv1/version.go b/eventarc/publishing/apiv1/version.go
new file mode 100644
index 0000000..a5f878e
--- /dev/null
+++ b/eventarc/publishing/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package publishing
+
+import "cloud.google.com/go/eventarc/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/filestore/apiv1/cloud_filestore_manager_client.go b/filestore/apiv1/cloud_filestore_manager_client.go
index 225d48a..af6116d 100644
--- a/filestore/apiv1/cloud_filestore_manager_client.go
+++ b/filestore/apiv1/cloud_filestore_manager_client.go
@@ -428,7 +428,7 @@
 // use by Google-written clients.
 func (c *cloudFilestoreManagerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -440,6 +440,7 @@
 
 func (c *cloudFilestoreManagerGRPCClient) ListInstances(ctx context.Context, req *filestorepb.ListInstancesRequest, opts ...gax.CallOption) *InstanceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInstances[0:len((*c.CallOptions).ListInstances):len((*c.CallOptions).ListInstances)], opts...)
 	it := &InstanceIterator{}
@@ -489,6 +490,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstance[0:len((*c.CallOptions).GetInstance):len((*c.CallOptions).GetInstance)], opts...)
 	var resp *filestorepb.Instance
@@ -510,6 +512,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateInstance[0:len((*c.CallOptions).CreateInstance):len((*c.CallOptions).CreateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -533,6 +536,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "instance.name", url.QueryEscape(req.GetInstance().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateInstance[0:len((*c.CallOptions).UpdateInstance):len((*c.CallOptions).UpdateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -556,6 +560,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RestoreInstance[0:len((*c.CallOptions).RestoreInstance):len((*c.CallOptions).RestoreInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -579,6 +584,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteInstance[0:len((*c.CallOptions).DeleteInstance):len((*c.CallOptions).DeleteInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -597,6 +603,7 @@
 
 func (c *cloudFilestoreManagerGRPCClient) ListBackups(ctx context.Context, req *filestorepb.ListBackupsRequest, opts ...gax.CallOption) *BackupIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBackups[0:len((*c.CallOptions).ListBackups):len((*c.CallOptions).ListBackups)], opts...)
 	it := &BackupIterator{}
@@ -646,6 +653,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBackup[0:len((*c.CallOptions).GetBackup):len((*c.CallOptions).GetBackup)], opts...)
 	var resp *filestorepb.Backup
@@ -667,6 +675,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBackup[0:len((*c.CallOptions).CreateBackup):len((*c.CallOptions).CreateBackup)], opts...)
 	var resp *longrunningpb.Operation
@@ -690,6 +699,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteBackup[0:len((*c.CallOptions).DeleteBackup):len((*c.CallOptions).DeleteBackup)], opts...)
 	var resp *longrunningpb.Operation
@@ -713,6 +723,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "backup.name", url.QueryEscape(req.GetBackup().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateBackup[0:len((*c.CallOptions).UpdateBackup):len((*c.CallOptions).UpdateBackup)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/filestore/apiv1/doc.go b/filestore/apiv1/doc.go
index ab340b4..1d7e23d 100644
--- a/filestore/apiv1/doc.go
+++ b/filestore/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/filestore/apiv1/version.go b/filestore/apiv1/version.go
new file mode 100644
index 0000000..d359080
--- /dev/null
+++ b/filestore/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package filestore
+
+import "cloud.google.com/go/filestore/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/firestore/apiv1/admin/doc.go b/firestore/apiv1/admin/doc.go
index 0904bbf..0923e88 100644
--- a/firestore/apiv1/admin/doc.go
+++ b/firestore/apiv1/admin/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/firestore/apiv1/admin/firestore_admin_client.go b/firestore/apiv1/admin/firestore_admin_client.go
index 5b85c62..d7c3ed2 100644
--- a/firestore/apiv1/admin/firestore_admin_client.go
+++ b/firestore/apiv1/admin/firestore_admin_client.go
@@ -471,7 +471,7 @@
 // use by Google-written clients.
 func (c *firestoreAdminGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -488,6 +488,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateIndex[0:len((*c.CallOptions).CreateIndex):len((*c.CallOptions).CreateIndex)], opts...)
 	var resp *longrunningpb.Operation
@@ -506,6 +507,7 @@
 
 func (c *firestoreAdminGRPCClient) ListIndexes(ctx context.Context, req *adminpb.ListIndexesRequest, opts ...gax.CallOption) *IndexIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListIndexes[0:len((*c.CallOptions).ListIndexes):len((*c.CallOptions).ListIndexes)], opts...)
 	it := &IndexIterator{}
@@ -555,6 +557,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIndex[0:len((*c.CallOptions).GetIndex):len((*c.CallOptions).GetIndex)], opts...)
 	var resp *adminpb.Index
@@ -576,6 +579,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteIndex[0:len((*c.CallOptions).DeleteIndex):len((*c.CallOptions).DeleteIndex)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -593,6 +597,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetField[0:len((*c.CallOptions).GetField):len((*c.CallOptions).GetField)], opts...)
 	var resp *adminpb.Field
@@ -614,6 +619,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "field.name", url.QueryEscape(req.GetField().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateField[0:len((*c.CallOptions).UpdateField):len((*c.CallOptions).UpdateField)], opts...)
 	var resp *longrunningpb.Operation
@@ -632,6 +638,7 @@
 
 func (c *firestoreAdminGRPCClient) ListFields(ctx context.Context, req *adminpb.ListFieldsRequest, opts ...gax.CallOption) *FieldIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFields[0:len((*c.CallOptions).ListFields):len((*c.CallOptions).ListFields)], opts...)
 	it := &FieldIterator{}
@@ -681,6 +688,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportDocuments[0:len((*c.CallOptions).ExportDocuments):len((*c.CallOptions).ExportDocuments)], opts...)
 	var resp *longrunningpb.Operation
@@ -704,6 +712,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportDocuments[0:len((*c.CallOptions).ImportDocuments):len((*c.CallOptions).ImportDocuments)], opts...)
 	var resp *longrunningpb.Operation
@@ -722,6 +731,7 @@
 
 func (c *firestoreAdminGRPCClient) GetDatabase(ctx context.Context, req *adminpb.GetDatabaseRequest, opts ...gax.CallOption) (*adminpb.Database, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDatabase[0:len((*c.CallOptions).GetDatabase):len((*c.CallOptions).GetDatabase)], opts...)
 	var resp *adminpb.Database
@@ -738,6 +748,7 @@
 
 func (c *firestoreAdminGRPCClient) ListDatabases(ctx context.Context, req *adminpb.ListDatabasesRequest, opts ...gax.CallOption) (*adminpb.ListDatabasesResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDatabases[0:len((*c.CallOptions).ListDatabases):len((*c.CallOptions).ListDatabases)], opts...)
 	var resp *adminpb.ListDatabasesResponse
@@ -754,6 +765,7 @@
 
 func (c *firestoreAdminGRPCClient) UpdateDatabase(ctx context.Context, req *adminpb.UpdateDatabaseRequest, opts ...gax.CallOption) (*UpdateDatabaseOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "database.name", url.QueryEscape(req.GetDatabase().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDatabase[0:len((*c.CallOptions).UpdateDatabase):len((*c.CallOptions).UpdateDatabase)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/firestore/apiv1/admin/version.go b/firestore/apiv1/admin/version.go
new file mode 100644
index 0000000..4bb15d8
--- /dev/null
+++ b/firestore/apiv1/admin/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package apiv1
+
+import "cloud.google.com/go/firestore/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/firestore/apiv1/doc.go b/firestore/apiv1/doc.go
index d79ae1e..7e4339b 100644
--- a/firestore/apiv1/doc.go
+++ b/firestore/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/firestore/apiv1/firestore_client.go b/firestore/apiv1/firestore_client.go
index 813db38..5fd539c 100644
--- a/firestore/apiv1/firestore_client.go
+++ b/firestore/apiv1/firestore_client.go
@@ -491,7 +491,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -508,6 +508,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDocument[0:len((*c.CallOptions).GetDocument):len((*c.CallOptions).GetDocument)], opts...)
 	var resp *firestorepb.Document
@@ -524,6 +525,7 @@
 
 func (c *gRPCClient) ListDocuments(ctx context.Context, req *firestorepb.ListDocumentsRequest, opts ...gax.CallOption) *DocumentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "parent", url.QueryEscape(req.GetParent()), "collection_id", url.QueryEscape(req.GetCollectionId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDocuments[0:len((*c.CallOptions).ListDocuments):len((*c.CallOptions).ListDocuments)], opts...)
 	it := &DocumentIterator{}
@@ -573,6 +575,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "document.name", url.QueryEscape(req.GetDocument().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDocument[0:len((*c.CallOptions).UpdateDocument):len((*c.CallOptions).UpdateDocument)], opts...)
 	var resp *firestorepb.Document
@@ -594,6 +597,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDocument[0:len((*c.CallOptions).DeleteDocument):len((*c.CallOptions).DeleteDocument)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -606,6 +610,7 @@
 
 func (c *gRPCClient) BatchGetDocuments(ctx context.Context, req *firestorepb.BatchGetDocumentsRequest, opts ...gax.CallOption) (firestorepb.Firestore_BatchGetDocumentsClient, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "database", url.QueryEscape(req.GetDatabase())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	var resp firestorepb.Firestore_BatchGetDocumentsClient
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -626,6 +631,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "database", url.QueryEscape(req.GetDatabase())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BeginTransaction[0:len((*c.CallOptions).BeginTransaction):len((*c.CallOptions).BeginTransaction)], opts...)
 	var resp *firestorepb.BeginTransactionResponse
@@ -647,6 +653,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "database", url.QueryEscape(req.GetDatabase())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Commit[0:len((*c.CallOptions).Commit):len((*c.CallOptions).Commit)], opts...)
 	var resp *firestorepb.CommitResponse
@@ -668,6 +675,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "database", url.QueryEscape(req.GetDatabase())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Rollback[0:len((*c.CallOptions).Rollback):len((*c.CallOptions).Rollback)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -680,6 +688,7 @@
 
 func (c *gRPCClient) RunQuery(ctx context.Context, req *firestorepb.RunQueryRequest, opts ...gax.CallOption) (firestorepb.Firestore_RunQueryClient, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	var resp firestorepb.Firestore_RunQueryClient
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -695,6 +704,7 @@
 
 func (c *gRPCClient) PartitionQuery(ctx context.Context, req *firestorepb.PartitionQueryRequest, opts ...gax.CallOption) *CursorIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PartitionQuery[0:len((*c.CallOptions).PartitionQuery):len((*c.CallOptions).PartitionQuery)], opts...)
 	it := &CursorIterator{}
@@ -769,6 +779,7 @@
 
 func (c *gRPCClient) ListCollectionIds(ctx context.Context, req *firestorepb.ListCollectionIdsRequest, opts ...gax.CallOption) *StringIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCollectionIds[0:len((*c.CallOptions).ListCollectionIds):len((*c.CallOptions).ListCollectionIds)], opts...)
 	it := &StringIterator{}
@@ -818,6 +829,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "database", url.QueryEscape(req.GetDatabase())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchWrite[0:len((*c.CallOptions).BatchWrite):len((*c.CallOptions).BatchWrite)], opts...)
 	var resp *firestorepb.BatchWriteResponse
@@ -839,6 +851,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "parent", url.QueryEscape(req.GetParent()), "collection_id", url.QueryEscape(req.GetCollectionId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDocument[0:len((*c.CallOptions).CreateDocument):len((*c.CallOptions).CreateDocument)], opts...)
 	var resp *firestorepb.Document
diff --git a/firestore/apiv1/version.go b/firestore/apiv1/version.go
new file mode 100644
index 0000000..cccf696
--- /dev/null
+++ b/firestore/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package firestore
+
+import "cloud.google.com/go/firestore/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/functions/apiv1/cloud_functions_client.go b/functions/apiv1/cloud_functions_client.go
index 95dbf61..7f7858f 100644
--- a/functions/apiv1/cloud_functions_client.go
+++ b/functions/apiv1/cloud_functions_client.go
@@ -391,7 +391,7 @@
 // use by Google-written clients.
 func (c *cloudFunctionsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -403,6 +403,7 @@
 
 func (c *cloudFunctionsGRPCClient) ListFunctions(ctx context.Context, req *functionspb.ListFunctionsRequest, opts ...gax.CallOption) *CloudFunctionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFunctions[0:len((*c.CallOptions).ListFunctions):len((*c.CallOptions).ListFunctions)], opts...)
 	it := &CloudFunctionIterator{}
@@ -452,6 +453,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFunction[0:len((*c.CallOptions).GetFunction):len((*c.CallOptions).GetFunction)], opts...)
 	var resp *functionspb.CloudFunction
@@ -473,6 +475,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateFunction[0:len((*c.CallOptions).CreateFunction):len((*c.CallOptions).CreateFunction)], opts...)
 	var resp *longrunningpb.Operation
@@ -496,6 +499,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "function.name", url.QueryEscape(req.GetFunction().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFunction[0:len((*c.CallOptions).UpdateFunction):len((*c.CallOptions).UpdateFunction)], opts...)
 	var resp *longrunningpb.Operation
@@ -519,6 +523,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteFunction[0:len((*c.CallOptions).DeleteFunction):len((*c.CallOptions).DeleteFunction)], opts...)
 	var resp *longrunningpb.Operation
@@ -542,6 +547,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CallFunction[0:len((*c.CallOptions).CallFunction):len((*c.CallOptions).CallFunction)], opts...)
 	var resp *functionspb.CallFunctionResponse
@@ -558,6 +564,7 @@
 
 func (c *cloudFunctionsGRPCClient) GenerateUploadUrl(ctx context.Context, req *functionspb.GenerateUploadUrlRequest, opts ...gax.CallOption) (*functionspb.GenerateUploadUrlResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GenerateUploadUrl[0:len((*c.CallOptions).GenerateUploadUrl):len((*c.CallOptions).GenerateUploadUrl)], opts...)
 	var resp *functionspb.GenerateUploadUrlResponse
@@ -574,6 +581,7 @@
 
 func (c *cloudFunctionsGRPCClient) GenerateDownloadUrl(ctx context.Context, req *functionspb.GenerateDownloadUrlRequest, opts ...gax.CallOption) (*functionspb.GenerateDownloadUrlResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GenerateDownloadUrl[0:len((*c.CallOptions).GenerateDownloadUrl):len((*c.CallOptions).GenerateDownloadUrl)], opts...)
 	var resp *functionspb.GenerateDownloadUrlResponse
@@ -590,6 +598,7 @@
 
 func (c *cloudFunctionsGRPCClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -606,6 +615,7 @@
 
 func (c *cloudFunctionsGRPCClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -622,6 +632,7 @@
 
 func (c *cloudFunctionsGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/functions/apiv1/doc.go b/functions/apiv1/doc.go
index b4c2282..13d193c 100644
--- a/functions/apiv1/doc.go
+++ b/functions/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/functions/apiv1/version.go b/functions/apiv1/version.go
new file mode 100644
index 0000000..e080220
--- /dev/null
+++ b/functions/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package functions
+
+import "cloud.google.com/go/functions/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/gaming/apiv1/doc.go b/gaming/apiv1/doc.go
index c44695a..d234dc5 100644
--- a/gaming/apiv1/doc.go
+++ b/gaming/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/gaming/apiv1/game_server_clusters_client.go b/gaming/apiv1/game_server_clusters_client.go
index c6e47ec..6c6db4c 100644
--- a/gaming/apiv1/game_server_clusters_client.go
+++ b/gaming/apiv1/game_server_clusters_client.go
@@ -331,7 +331,7 @@
 // use by Google-written clients.
 func (c *gameServerClustersGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -343,6 +343,7 @@
 
 func (c *gameServerClustersGRPCClient) ListGameServerClusters(ctx context.Context, req *gamingpb.ListGameServerClustersRequest, opts ...gax.CallOption) *GameServerClusterIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGameServerClusters[0:len((*c.CallOptions).ListGameServerClusters):len((*c.CallOptions).ListGameServerClusters)], opts...)
 	it := &GameServerClusterIterator{}
@@ -392,6 +393,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGameServerCluster[0:len((*c.CallOptions).GetGameServerCluster):len((*c.CallOptions).GetGameServerCluster)], opts...)
 	var resp *gamingpb.GameServerCluster
@@ -413,6 +415,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGameServerCluster[0:len((*c.CallOptions).CreateGameServerCluster):len((*c.CallOptions).CreateGameServerCluster)], opts...)
 	var resp *longrunningpb.Operation
@@ -436,6 +439,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PreviewCreateGameServerCluster[0:len((*c.CallOptions).PreviewCreateGameServerCluster):len((*c.CallOptions).PreviewCreateGameServerCluster)], opts...)
 	var resp *gamingpb.PreviewCreateGameServerClusterResponse
@@ -457,6 +461,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGameServerCluster[0:len((*c.CallOptions).DeleteGameServerCluster):len((*c.CallOptions).DeleteGameServerCluster)], opts...)
 	var resp *longrunningpb.Operation
@@ -480,6 +485,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PreviewDeleteGameServerCluster[0:len((*c.CallOptions).PreviewDeleteGameServerCluster):len((*c.CallOptions).PreviewDeleteGameServerCluster)], opts...)
 	var resp *gamingpb.PreviewDeleteGameServerClusterResponse
@@ -501,6 +507,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "game_server_cluster.name", url.QueryEscape(req.GetGameServerCluster().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGameServerCluster[0:len((*c.CallOptions).UpdateGameServerCluster):len((*c.CallOptions).UpdateGameServerCluster)], opts...)
 	var resp *longrunningpb.Operation
@@ -524,6 +531,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "game_server_cluster.name", url.QueryEscape(req.GetGameServerCluster().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PreviewUpdateGameServerCluster[0:len((*c.CallOptions).PreviewUpdateGameServerCluster):len((*c.CallOptions).PreviewUpdateGameServerCluster)], opts...)
 	var resp *gamingpb.PreviewUpdateGameServerClusterResponse
diff --git a/gaming/apiv1/game_server_configs_client.go b/gaming/apiv1/game_server_configs_client.go
index e6b978a..964b29e 100644
--- a/gaming/apiv1/game_server_configs_client.go
+++ b/gaming/apiv1/game_server_configs_client.go
@@ -263,7 +263,7 @@
 // use by Google-written clients.
 func (c *gameServerConfigsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -275,6 +275,7 @@
 
 func (c *gameServerConfigsGRPCClient) ListGameServerConfigs(ctx context.Context, req *gamingpb.ListGameServerConfigsRequest, opts ...gax.CallOption) *GameServerConfigIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGameServerConfigs[0:len((*c.CallOptions).ListGameServerConfigs):len((*c.CallOptions).ListGameServerConfigs)], opts...)
 	it := &GameServerConfigIterator{}
@@ -324,6 +325,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGameServerConfig[0:len((*c.CallOptions).GetGameServerConfig):len((*c.CallOptions).GetGameServerConfig)], opts...)
 	var resp *gamingpb.GameServerConfig
@@ -345,6 +347,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGameServerConfig[0:len((*c.CallOptions).CreateGameServerConfig):len((*c.CallOptions).CreateGameServerConfig)], opts...)
 	var resp *longrunningpb.Operation
@@ -368,6 +371,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGameServerConfig[0:len((*c.CallOptions).DeleteGameServerConfig):len((*c.CallOptions).DeleteGameServerConfig)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/gaming/apiv1/game_server_deployments_client.go b/gaming/apiv1/game_server_deployments_client.go
index 4689c4c..11b7c7c 100644
--- a/gaming/apiv1/game_server_deployments_client.go
+++ b/gaming/apiv1/game_server_deployments_client.go
@@ -353,7 +353,7 @@
 // use by Google-written clients.
 func (c *gameServerDeploymentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -365,6 +365,7 @@
 
 func (c *gameServerDeploymentsGRPCClient) ListGameServerDeployments(ctx context.Context, req *gamingpb.ListGameServerDeploymentsRequest, opts ...gax.CallOption) *GameServerDeploymentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGameServerDeployments[0:len((*c.CallOptions).ListGameServerDeployments):len((*c.CallOptions).ListGameServerDeployments)], opts...)
 	it := &GameServerDeploymentIterator{}
@@ -414,6 +415,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGameServerDeployment[0:len((*c.CallOptions).GetGameServerDeployment):len((*c.CallOptions).GetGameServerDeployment)], opts...)
 	var resp *gamingpb.GameServerDeployment
@@ -435,6 +437,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGameServerDeployment[0:len((*c.CallOptions).CreateGameServerDeployment):len((*c.CallOptions).CreateGameServerDeployment)], opts...)
 	var resp *longrunningpb.Operation
@@ -458,6 +461,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGameServerDeployment[0:len((*c.CallOptions).DeleteGameServerDeployment):len((*c.CallOptions).DeleteGameServerDeployment)], opts...)
 	var resp *longrunningpb.Operation
@@ -481,6 +485,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "game_server_deployment.name", url.QueryEscape(req.GetGameServerDeployment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGameServerDeployment[0:len((*c.CallOptions).UpdateGameServerDeployment):len((*c.CallOptions).UpdateGameServerDeployment)], opts...)
 	var resp *longrunningpb.Operation
@@ -504,6 +509,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGameServerDeploymentRollout[0:len((*c.CallOptions).GetGameServerDeploymentRollout):len((*c.CallOptions).GetGameServerDeploymentRollout)], opts...)
 	var resp *gamingpb.GameServerDeploymentRollout
@@ -525,6 +531,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "rollout.name", url.QueryEscape(req.GetRollout().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGameServerDeploymentRollout[0:len((*c.CallOptions).UpdateGameServerDeploymentRollout):len((*c.CallOptions).UpdateGameServerDeploymentRollout)], opts...)
 	var resp *longrunningpb.Operation
@@ -548,6 +555,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "rollout.name", url.QueryEscape(req.GetRollout().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PreviewGameServerDeploymentRollout[0:len((*c.CallOptions).PreviewGameServerDeploymentRollout):len((*c.CallOptions).PreviewGameServerDeploymentRollout)], opts...)
 	var resp *gamingpb.PreviewGameServerDeploymentRolloutResponse
@@ -569,6 +577,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FetchDeploymentState[0:len((*c.CallOptions).FetchDeploymentState):len((*c.CallOptions).FetchDeploymentState)], opts...)
 	var resp *gamingpb.FetchDeploymentStateResponse
diff --git a/gaming/apiv1/realms_client.go b/gaming/apiv1/realms_client.go
index 8b508d3..f7ea395 100644
--- a/gaming/apiv1/realms_client.go
+++ b/gaming/apiv1/realms_client.go
@@ -294,7 +294,7 @@
 // use by Google-written clients.
 func (c *realmsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -306,6 +306,7 @@
 
 func (c *realmsGRPCClient) ListRealms(ctx context.Context, req *gamingpb.ListRealmsRequest, opts ...gax.CallOption) *RealmIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListRealms[0:len((*c.CallOptions).ListRealms):len((*c.CallOptions).ListRealms)], opts...)
 	it := &RealmIterator{}
@@ -355,6 +356,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetRealm[0:len((*c.CallOptions).GetRealm):len((*c.CallOptions).GetRealm)], opts...)
 	var resp *gamingpb.Realm
@@ -376,6 +378,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateRealm[0:len((*c.CallOptions).CreateRealm):len((*c.CallOptions).CreateRealm)], opts...)
 	var resp *longrunningpb.Operation
@@ -399,6 +402,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteRealm[0:len((*c.CallOptions).DeleteRealm):len((*c.CallOptions).DeleteRealm)], opts...)
 	var resp *longrunningpb.Operation
@@ -422,6 +426,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "realm.name", url.QueryEscape(req.GetRealm().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateRealm[0:len((*c.CallOptions).UpdateRealm):len((*c.CallOptions).UpdateRealm)], opts...)
 	var resp *longrunningpb.Operation
@@ -445,6 +450,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "realm.name", url.QueryEscape(req.GetRealm().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PreviewRealmUpdate[0:len((*c.CallOptions).PreviewRealmUpdate):len((*c.CallOptions).PreviewRealmUpdate)], opts...)
 	var resp *gamingpb.PreviewRealmUpdateResponse
diff --git a/gaming/apiv1/version.go b/gaming/apiv1/version.go
new file mode 100644
index 0000000..cb15774
--- /dev/null
+++ b/gaming/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package gaming
+
+import "cloud.google.com/go/gaming/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/gaming/apiv1beta/doc.go b/gaming/apiv1beta/doc.go
index 2c6ccc7..34da0d8 100644
--- a/gaming/apiv1beta/doc.go
+++ b/gaming/apiv1beta/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/gaming/apiv1beta/game_server_clusters_client.go b/gaming/apiv1beta/game_server_clusters_client.go
index 9eeae63..86286d3 100644
--- a/gaming/apiv1beta/game_server_clusters_client.go
+++ b/gaming/apiv1beta/game_server_clusters_client.go
@@ -331,7 +331,7 @@
 // use by Google-written clients.
 func (c *gameServerClustersGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -343,6 +343,7 @@
 
 func (c *gameServerClustersGRPCClient) ListGameServerClusters(ctx context.Context, req *gamingpb.ListGameServerClustersRequest, opts ...gax.CallOption) *GameServerClusterIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGameServerClusters[0:len((*c.CallOptions).ListGameServerClusters):len((*c.CallOptions).ListGameServerClusters)], opts...)
 	it := &GameServerClusterIterator{}
@@ -392,6 +393,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGameServerCluster[0:len((*c.CallOptions).GetGameServerCluster):len((*c.CallOptions).GetGameServerCluster)], opts...)
 	var resp *gamingpb.GameServerCluster
@@ -413,6 +415,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGameServerCluster[0:len((*c.CallOptions).CreateGameServerCluster):len((*c.CallOptions).CreateGameServerCluster)], opts...)
 	var resp *longrunningpb.Operation
@@ -436,6 +439,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PreviewCreateGameServerCluster[0:len((*c.CallOptions).PreviewCreateGameServerCluster):len((*c.CallOptions).PreviewCreateGameServerCluster)], opts...)
 	var resp *gamingpb.PreviewCreateGameServerClusterResponse
@@ -457,6 +461,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGameServerCluster[0:len((*c.CallOptions).DeleteGameServerCluster):len((*c.CallOptions).DeleteGameServerCluster)], opts...)
 	var resp *longrunningpb.Operation
@@ -480,6 +485,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PreviewDeleteGameServerCluster[0:len((*c.CallOptions).PreviewDeleteGameServerCluster):len((*c.CallOptions).PreviewDeleteGameServerCluster)], opts...)
 	var resp *gamingpb.PreviewDeleteGameServerClusterResponse
@@ -501,6 +507,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "game_server_cluster.name", url.QueryEscape(req.GetGameServerCluster().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGameServerCluster[0:len((*c.CallOptions).UpdateGameServerCluster):len((*c.CallOptions).UpdateGameServerCluster)], opts...)
 	var resp *longrunningpb.Operation
@@ -524,6 +531,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "game_server_cluster.name", url.QueryEscape(req.GetGameServerCluster().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PreviewUpdateGameServerCluster[0:len((*c.CallOptions).PreviewUpdateGameServerCluster):len((*c.CallOptions).PreviewUpdateGameServerCluster)], opts...)
 	var resp *gamingpb.PreviewUpdateGameServerClusterResponse
diff --git a/gaming/apiv1beta/game_server_configs_client.go b/gaming/apiv1beta/game_server_configs_client.go
index 39ed301..b9142db 100644
--- a/gaming/apiv1beta/game_server_configs_client.go
+++ b/gaming/apiv1beta/game_server_configs_client.go
@@ -263,7 +263,7 @@
 // use by Google-written clients.
 func (c *gameServerConfigsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -275,6 +275,7 @@
 
 func (c *gameServerConfigsGRPCClient) ListGameServerConfigs(ctx context.Context, req *gamingpb.ListGameServerConfigsRequest, opts ...gax.CallOption) *GameServerConfigIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGameServerConfigs[0:len((*c.CallOptions).ListGameServerConfigs):len((*c.CallOptions).ListGameServerConfigs)], opts...)
 	it := &GameServerConfigIterator{}
@@ -324,6 +325,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGameServerConfig[0:len((*c.CallOptions).GetGameServerConfig):len((*c.CallOptions).GetGameServerConfig)], opts...)
 	var resp *gamingpb.GameServerConfig
@@ -345,6 +347,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGameServerConfig[0:len((*c.CallOptions).CreateGameServerConfig):len((*c.CallOptions).CreateGameServerConfig)], opts...)
 	var resp *longrunningpb.Operation
@@ -368,6 +371,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGameServerConfig[0:len((*c.CallOptions).DeleteGameServerConfig):len((*c.CallOptions).DeleteGameServerConfig)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/gaming/apiv1beta/game_server_deployments_client.go b/gaming/apiv1beta/game_server_deployments_client.go
index db1b5d1..eb4d8ac 100644
--- a/gaming/apiv1beta/game_server_deployments_client.go
+++ b/gaming/apiv1beta/game_server_deployments_client.go
@@ -353,7 +353,7 @@
 // use by Google-written clients.
 func (c *gameServerDeploymentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -365,6 +365,7 @@
 
 func (c *gameServerDeploymentsGRPCClient) ListGameServerDeployments(ctx context.Context, req *gamingpb.ListGameServerDeploymentsRequest, opts ...gax.CallOption) *GameServerDeploymentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGameServerDeployments[0:len((*c.CallOptions).ListGameServerDeployments):len((*c.CallOptions).ListGameServerDeployments)], opts...)
 	it := &GameServerDeploymentIterator{}
@@ -414,6 +415,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGameServerDeployment[0:len((*c.CallOptions).GetGameServerDeployment):len((*c.CallOptions).GetGameServerDeployment)], opts...)
 	var resp *gamingpb.GameServerDeployment
@@ -435,6 +437,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGameServerDeployment[0:len((*c.CallOptions).CreateGameServerDeployment):len((*c.CallOptions).CreateGameServerDeployment)], opts...)
 	var resp *longrunningpb.Operation
@@ -458,6 +461,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGameServerDeployment[0:len((*c.CallOptions).DeleteGameServerDeployment):len((*c.CallOptions).DeleteGameServerDeployment)], opts...)
 	var resp *longrunningpb.Operation
@@ -481,6 +485,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "game_server_deployment.name", url.QueryEscape(req.GetGameServerDeployment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGameServerDeployment[0:len((*c.CallOptions).UpdateGameServerDeployment):len((*c.CallOptions).UpdateGameServerDeployment)], opts...)
 	var resp *longrunningpb.Operation
@@ -504,6 +509,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGameServerDeploymentRollout[0:len((*c.CallOptions).GetGameServerDeploymentRollout):len((*c.CallOptions).GetGameServerDeploymentRollout)], opts...)
 	var resp *gamingpb.GameServerDeploymentRollout
@@ -525,6 +531,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "rollout.name", url.QueryEscape(req.GetRollout().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGameServerDeploymentRollout[0:len((*c.CallOptions).UpdateGameServerDeploymentRollout):len((*c.CallOptions).UpdateGameServerDeploymentRollout)], opts...)
 	var resp *longrunningpb.Operation
@@ -548,6 +555,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "rollout.name", url.QueryEscape(req.GetRollout().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PreviewGameServerDeploymentRollout[0:len((*c.CallOptions).PreviewGameServerDeploymentRollout):len((*c.CallOptions).PreviewGameServerDeploymentRollout)], opts...)
 	var resp *gamingpb.PreviewGameServerDeploymentRolloutResponse
@@ -569,6 +577,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FetchDeploymentState[0:len((*c.CallOptions).FetchDeploymentState):len((*c.CallOptions).FetchDeploymentState)], opts...)
 	var resp *gamingpb.FetchDeploymentStateResponse
diff --git a/gaming/apiv1beta/realms_client.go b/gaming/apiv1beta/realms_client.go
index 50b2422..edb54ec 100644
--- a/gaming/apiv1beta/realms_client.go
+++ b/gaming/apiv1beta/realms_client.go
@@ -294,7 +294,7 @@
 // use by Google-written clients.
 func (c *realmsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -306,6 +306,7 @@
 
 func (c *realmsGRPCClient) ListRealms(ctx context.Context, req *gamingpb.ListRealmsRequest, opts ...gax.CallOption) *RealmIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListRealms[0:len((*c.CallOptions).ListRealms):len((*c.CallOptions).ListRealms)], opts...)
 	it := &RealmIterator{}
@@ -355,6 +356,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetRealm[0:len((*c.CallOptions).GetRealm):len((*c.CallOptions).GetRealm)], opts...)
 	var resp *gamingpb.Realm
@@ -376,6 +378,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateRealm[0:len((*c.CallOptions).CreateRealm):len((*c.CallOptions).CreateRealm)], opts...)
 	var resp *longrunningpb.Operation
@@ -399,6 +402,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteRealm[0:len((*c.CallOptions).DeleteRealm):len((*c.CallOptions).DeleteRealm)], opts...)
 	var resp *longrunningpb.Operation
@@ -422,6 +426,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "realm.name", url.QueryEscape(req.GetRealm().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateRealm[0:len((*c.CallOptions).UpdateRealm):len((*c.CallOptions).UpdateRealm)], opts...)
 	var resp *longrunningpb.Operation
@@ -445,6 +450,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "realm.name", url.QueryEscape(req.GetRealm().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PreviewRealmUpdate[0:len((*c.CallOptions).PreviewRealmUpdate):len((*c.CallOptions).PreviewRealmUpdate)], opts...)
 	var resp *gamingpb.PreviewRealmUpdateResponse
diff --git a/gaming/apiv1beta/version.go b/gaming/apiv1beta/version.go
new file mode 100644
index 0000000..cb15774
--- /dev/null
+++ b/gaming/apiv1beta/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package gaming
+
+import "cloud.google.com/go/gaming/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/gkeconnect/gateway/apiv1beta1/doc.go b/gkeconnect/gateway/apiv1beta1/doc.go
index 99b13f6..4917e4c 100644
--- a/gkeconnect/gateway/apiv1beta1/doc.go
+++ b/gkeconnect/gateway/apiv1beta1/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/gkeconnect/gateway/apiv1beta1/gateway_client.go b/gkeconnect/gateway/apiv1beta1/gateway_client.go
index 6d58239..3ca5616 100644
--- a/gkeconnect/gateway/apiv1beta1/gateway_client.go
+++ b/gkeconnect/gateway/apiv1beta1/gateway_client.go
@@ -212,7 +212,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/gkeconnect/gateway/apiv1beta1/version.go b/gkeconnect/gateway/apiv1beta1/version.go
new file mode 100644
index 0000000..86dc82e
--- /dev/null
+++ b/gkeconnect/gateway/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package gateway
+
+import "cloud.google.com/go/gkeconnect/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/gkehub/apiv1beta1/doc.go b/gkehub/apiv1beta1/doc.go
index 30d944b..29d72b8 100644
--- a/gkehub/apiv1beta1/doc.go
+++ b/gkehub/apiv1beta1/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/gkehub/apiv1beta1/gke_hub_membership_client.go b/gkehub/apiv1beta1/gke_hub_membership_client.go
index 1e60f60..610bdbe 100644
--- a/gkehub/apiv1beta1/gke_hub_membership_client.go
+++ b/gkehub/apiv1beta1/gke_hub_membership_client.go
@@ -395,7 +395,7 @@
 // use by Google-written clients.
 func (c *gkeHubMembershipGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -407,6 +407,7 @@
 
 func (c *gkeHubMembershipGRPCClient) ListMemberships(ctx context.Context, req *gkehubpb.ListMembershipsRequest, opts ...gax.CallOption) *MembershipIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMemberships[0:len((*c.CallOptions).ListMemberships):len((*c.CallOptions).ListMemberships)], opts...)
 	it := &MembershipIterator{}
@@ -456,6 +457,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMembership[0:len((*c.CallOptions).GetMembership):len((*c.CallOptions).GetMembership)], opts...)
 	var resp *gkehubpb.Membership
@@ -477,6 +479,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMembership[0:len((*c.CallOptions).CreateMembership):len((*c.CallOptions).CreateMembership)], opts...)
 	var resp *longrunningpb.Operation
@@ -500,6 +503,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteMembership[0:len((*c.CallOptions).DeleteMembership):len((*c.CallOptions).DeleteMembership)], opts...)
 	var resp *longrunningpb.Operation
@@ -523,6 +527,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateMembership[0:len((*c.CallOptions).UpdateMembership):len((*c.CallOptions).UpdateMembership)], opts...)
 	var resp *longrunningpb.Operation
@@ -546,6 +551,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GenerateConnectManifest[0:len((*c.CallOptions).GenerateConnectManifest):len((*c.CallOptions).GenerateConnectManifest)], opts...)
 	var resp *gkehubpb.GenerateConnectManifestResponse
@@ -567,6 +573,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ValidateExclusivity[0:len((*c.CallOptions).ValidateExclusivity):len((*c.CallOptions).ValidateExclusivity)], opts...)
 	var resp *gkehubpb.ValidateExclusivityResponse
@@ -588,6 +595,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GenerateExclusivityManifest[0:len((*c.CallOptions).GenerateExclusivityManifest):len((*c.CallOptions).GenerateExclusivityManifest)], opts...)
 	var resp *gkehubpb.GenerateExclusivityManifestResponse
diff --git a/gkehub/apiv1beta1/version.go b/gkehub/apiv1beta1/version.go
new file mode 100644
index 0000000..52dbb7d
--- /dev/null
+++ b/gkehub/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package gkehub
+
+import "cloud.google.com/go/gkehub/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/gsuiteaddons/apiv1/doc.go b/gsuiteaddons/apiv1/doc.go
index 092f56e..c395682 100644
--- a/gsuiteaddons/apiv1/doc.go
+++ b/gsuiteaddons/apiv1/doc.go
@@ -82,7 +82,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/gsuiteaddons/apiv1/g_suite_add_ons_client.go b/gsuiteaddons/apiv1/g_suite_add_ons_client.go
index 13e82f4..49fdec8 100644
--- a/gsuiteaddons/apiv1/g_suite_add_ons_client.go
+++ b/gsuiteaddons/apiv1/g_suite_add_ons_client.go
@@ -365,7 +365,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -382,6 +382,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAuthorization[0:len((*c.CallOptions).GetAuthorization):len((*c.CallOptions).GetAuthorization)], opts...)
 	var resp *gsuiteaddonspb.Authorization
@@ -403,6 +404,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDeployment[0:len((*c.CallOptions).CreateDeployment):len((*c.CallOptions).CreateDeployment)], opts...)
 	var resp *gsuiteaddonspb.Deployment
@@ -424,6 +426,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "deployment.name", url.QueryEscape(req.GetDeployment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReplaceDeployment[0:len((*c.CallOptions).ReplaceDeployment):len((*c.CallOptions).ReplaceDeployment)], opts...)
 	var resp *gsuiteaddonspb.Deployment
@@ -445,6 +448,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDeployment[0:len((*c.CallOptions).GetDeployment):len((*c.CallOptions).GetDeployment)], opts...)
 	var resp *gsuiteaddonspb.Deployment
@@ -461,6 +465,7 @@
 
 func (c *gRPCClient) ListDeployments(ctx context.Context, req *gsuiteaddonspb.ListDeploymentsRequest, opts ...gax.CallOption) *DeploymentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDeployments[0:len((*c.CallOptions).ListDeployments):len((*c.CallOptions).ListDeployments)], opts...)
 	it := &DeploymentIterator{}
@@ -510,6 +515,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDeployment[0:len((*c.CallOptions).DeleteDeployment):len((*c.CallOptions).DeleteDeployment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -527,6 +533,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).InstallDeployment[0:len((*c.CallOptions).InstallDeployment):len((*c.CallOptions).InstallDeployment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -544,6 +551,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UninstallDeployment[0:len((*c.CallOptions).UninstallDeployment):len((*c.CallOptions).UninstallDeployment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -561,6 +569,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstallStatus[0:len((*c.CallOptions).GetInstallStatus):len((*c.CallOptions).GetInstallStatus)], opts...)
 	var resp *gsuiteaddonspb.InstallStatus
diff --git a/gsuiteaddons/apiv1/version.go b/gsuiteaddons/apiv1/version.go
new file mode 100644
index 0000000..d7d5bf0
--- /dev/null
+++ b/gsuiteaddons/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package gsuiteaddons
+
+import "cloud.google.com/go/gsuiteaddons/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/iam/credentials/apiv1/doc.go b/iam/credentials/apiv1/doc.go
index d407780..5fa6c81 100644
--- a/iam/credentials/apiv1/doc.go
+++ b/iam/credentials/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/iam/credentials/apiv1/iam_credentials_client.go b/iam/credentials/apiv1/iam_credentials_client.go
index 5414851..43b8ffd 100644
--- a/iam/credentials/apiv1/iam_credentials_client.go
+++ b/iam/credentials/apiv1/iam_credentials_client.go
@@ -259,7 +259,7 @@
 // use by Google-written clients.
 func (c *iamCredentialsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -276,6 +276,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GenerateAccessToken[0:len((*c.CallOptions).GenerateAccessToken):len((*c.CallOptions).GenerateAccessToken)], opts...)
 	var resp *credentialspb.GenerateAccessTokenResponse
@@ -297,6 +298,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GenerateIdToken[0:len((*c.CallOptions).GenerateIdToken):len((*c.CallOptions).GenerateIdToken)], opts...)
 	var resp *credentialspb.GenerateIdTokenResponse
@@ -318,6 +320,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SignBlob[0:len((*c.CallOptions).SignBlob):len((*c.CallOptions).SignBlob)], opts...)
 	var resp *credentialspb.SignBlobResponse
@@ -339,6 +342,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SignJwt[0:len((*c.CallOptions).SignJwt):len((*c.CallOptions).SignJwt)], opts...)
 	var resp *credentialspb.SignJwtResponse
diff --git a/iam/credentials/apiv1/version.go b/iam/credentials/apiv1/version.go
new file mode 100644
index 0000000..51a8a7f
--- /dev/null
+++ b/iam/credentials/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package credentials
+
+import "cloud.google.com/go/iam/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/iap/apiv1/doc.go b/iap/apiv1/doc.go
index ab21317..0333d7e 100644
--- a/iap/apiv1/doc.go
+++ b/iap/apiv1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/iap/apiv1/identity_aware_proxy_admin_client.go b/iap/apiv1/identity_aware_proxy_admin_client.go
index aa5c31b..30368ad 100644
--- a/iap/apiv1/identity_aware_proxy_admin_client.go
+++ b/iap/apiv1/identity_aware_proxy_admin_client.go
@@ -217,7 +217,7 @@
 // use by Google-written clients.
 func (c *identityAwareProxyAdminGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -234,6 +234,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -255,6 +256,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -276,6 +278,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
@@ -297,6 +300,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIapSettings[0:len((*c.CallOptions).GetIapSettings):len((*c.CallOptions).GetIapSettings)], opts...)
 	var resp *iappb.IapSettings
@@ -318,6 +322,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "iap_settings.name", url.QueryEscape(req.GetIapSettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateIapSettings[0:len((*c.CallOptions).UpdateIapSettings):len((*c.CallOptions).UpdateIapSettings)], opts...)
 	var resp *iappb.IapSettings
diff --git a/iap/apiv1/identity_aware_proxyo_auth_client.go b/iap/apiv1/identity_aware_proxyo_auth_client.go
index e46c647..9d02d69 100644
--- a/iap/apiv1/identity_aware_proxyo_auth_client.go
+++ b/iap/apiv1/identity_aware_proxyo_auth_client.go
@@ -248,7 +248,7 @@
 // use by Google-written clients.
 func (c *identityAwareProxyOAuthGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -265,6 +265,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBrands[0:len((*c.CallOptions).ListBrands):len((*c.CallOptions).ListBrands)], opts...)
 	var resp *iappb.ListBrandsResponse
@@ -286,6 +287,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBrand[0:len((*c.CallOptions).CreateBrand):len((*c.CallOptions).CreateBrand)], opts...)
 	var resp *iappb.Brand
@@ -307,6 +309,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBrand[0:len((*c.CallOptions).GetBrand):len((*c.CallOptions).GetBrand)], opts...)
 	var resp *iappb.Brand
@@ -328,6 +331,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateIdentityAwareProxyClient[0:len((*c.CallOptions).CreateIdentityAwareProxyClient):len((*c.CallOptions).CreateIdentityAwareProxyClient)], opts...)
 	var resp *iappb.IdentityAwareProxyClient
@@ -344,6 +348,7 @@
 
 func (c *identityAwareProxyOAuthGRPCClient) ListIdentityAwareProxyClients(ctx context.Context, req *iappb.ListIdentityAwareProxyClientsRequest, opts ...gax.CallOption) *IdentityAwareProxyClientIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListIdentityAwareProxyClients[0:len((*c.CallOptions).ListIdentityAwareProxyClients):len((*c.CallOptions).ListIdentityAwareProxyClients)], opts...)
 	it := &IdentityAwareProxyClientIterator{}
@@ -393,6 +398,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIdentityAwareProxyClient[0:len((*c.CallOptions).GetIdentityAwareProxyClient):len((*c.CallOptions).GetIdentityAwareProxyClient)], opts...)
 	var resp *iappb.IdentityAwareProxyClient
@@ -414,6 +420,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResetIdentityAwareProxyClientSecret[0:len((*c.CallOptions).ResetIdentityAwareProxyClientSecret):len((*c.CallOptions).ResetIdentityAwareProxyClientSecret)], opts...)
 	var resp *iappb.IdentityAwareProxyClient
@@ -435,6 +442,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteIdentityAwareProxyClient[0:len((*c.CallOptions).DeleteIdentityAwareProxyClient):len((*c.CallOptions).DeleteIdentityAwareProxyClient)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/iap/apiv1/version.go b/iap/apiv1/version.go
new file mode 100644
index 0000000..db73d8b
--- /dev/null
+++ b/iap/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package iap
+
+import "cloud.google.com/go/iap/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/ids/apiv1/doc.go b/ids/apiv1/doc.go
index f1d1ede..bf6721d 100644
--- a/ids/apiv1/doc.go
+++ b/ids/apiv1/doc.go
@@ -96,7 +96,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/ids/apiv1/ids_client.go b/ids/apiv1/ids_client.go
index 3b9c689..8e4d203 100644
--- a/ids/apiv1/ids_client.go
+++ b/ids/apiv1/ids_client.go
@@ -259,7 +259,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -271,6 +271,7 @@
 
 func (c *gRPCClient) ListEndpoints(ctx context.Context, req *idspb.ListEndpointsRequest, opts ...gax.CallOption) *EndpointIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEndpoints[0:len((*c.CallOptions).ListEndpoints):len((*c.CallOptions).ListEndpoints)], opts...)
 	it := &EndpointIterator{}
@@ -320,6 +321,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEndpoint[0:len((*c.CallOptions).GetEndpoint):len((*c.CallOptions).GetEndpoint)], opts...)
 	var resp *idspb.Endpoint
@@ -341,6 +343,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEndpoint[0:len((*c.CallOptions).CreateEndpoint):len((*c.CallOptions).CreateEndpoint)], opts...)
 	var resp *longrunningpb.Operation
@@ -364,6 +367,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEndpoint[0:len((*c.CallOptions).DeleteEndpoint):len((*c.CallOptions).DeleteEndpoint)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/ids/apiv1/version.go b/ids/apiv1/version.go
new file mode 100644
index 0000000..2c183e0
--- /dev/null
+++ b/ids/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package ids
+
+import "cloud.google.com/go/ids/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/internal/gapicgen/generator/_version.go.txt b/internal/gapicgen/generator/_version.go.txt
new file mode 100644
index 0000000..e97789a
--- /dev/null
+++ b/internal/gapicgen/generator/_version.go.txt
@@ -0,0 +1,23 @@
+// Copyright {{.Year}} Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package {{.Package}}
+
+import "{{.ModuleRootInternal}}"
+
+func init() {
+    versionClient = internal.Version
+}
\ No newline at end of file
diff --git a/internal/gapicgen/generator/config.go b/internal/gapicgen/generator/config.go
index 6f55775..97067c4 100644
--- a/internal/gapicgen/generator/config.go
+++ b/internal/gapicgen/generator/config.go
@@ -685,7 +685,7 @@
 		pkg:                   "logging",
 		importPath:            "cloud.google.com/go/logging/apiv2",
 		gRPCServiceConfigPath: "logging_grpc_service_config.json",
-		apiServiceConfigPath:  "logging.yaml",
+		apiServiceConfigPath:  "logging_v2.yaml",
 		releaseLevel:          "ga",
 	},
 	{
diff --git a/internal/gapicgen/generator/gapics.go b/internal/gapicgen/generator/gapics.go
index d6f3302..4a918f6 100644
--- a/internal/gapicgen/generator/gapics.go
+++ b/internal/gapicgen/generator/gapics.go
@@ -24,6 +24,7 @@
 	"os"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"cloud.google.com/go/internal/gapicgen/execv"
 	"cloud.google.com/go/internal/gapicgen/execv/gocmd"
@@ -37,6 +38,8 @@
 	changesTmpl string
 	//go:embed _README.md.txt
 	readmeTmpl string
+	//go:embed _version.go.txt
+	versionTmpl string
 )
 
 // GapicGenerator is used to regenerate gapic libraries.
@@ -50,6 +53,7 @@
 	onlyGenerateGapic bool
 	genModule         bool
 	modifiedPkgs      []string
+	forceAll          bool
 }
 
 // NewGapicGenerator creates a GapicGenerator.
@@ -64,6 +68,7 @@
 		onlyGenerateGapic: c.OnlyGenerateGapic,
 		genModule:         c.GenModule,
 		modifiedPkgs:      modifiedPkgs,
+		forceAll:          c.ForceAll,
 	}
 }
 
@@ -78,11 +83,7 @@
 	log.Println("regenerating gapics")
 	var newMods []modInfo
 	for _, c := range microgenGapicConfigs {
-		// Skip generation if generating all of the gapics and the associated
-		// config has a block on it. Or if generating a single gapic and it does
-		// not match the specified import path.
-		if (c.stopGeneration && g.gapicToGenerate == "") ||
-			(g.gapicToGenerate != "" && !strings.Contains(g.gapicToGenerate, c.importPath)) {
+		if !g.shouldGenerateConfig(c) {
 			continue
 		}
 
@@ -106,6 +107,9 @@
 				return nil
 			}
 		}
+		if err := g.genVersionFile(c); err != nil {
+			return err
+		}
 	}
 
 	if err := g.copyMicrogenFiles(); err != nil {
@@ -117,10 +121,6 @@
 		return err
 	}
 
-	if err := g.resetUnknownVersion(); err != nil {
-		return err
-	}
-
 	if g.regenOnly {
 		return nil
 	}
@@ -136,10 +136,6 @@
 		}
 	}
 
-	if err := g.setVersion(); err != nil {
-		return err
-	}
-
 	if !g.onlyGenerateGapic {
 		if err := g.regenSnippets(ctx); err != nil {
 			return err
@@ -169,6 +165,22 @@
 	return nil
 }
 
+func (g *GapicGenerator) shouldGenerateConfig(c *microgenConfig) bool {
+	if g.forceAll && !c.stopGeneration {
+		return true
+	}
+
+	// Skip generation if generating all of the gapics and the associated
+	// config has a block on it. Or if generating a single gapic and it does
+	// not match the specified import path.
+	if (c.stopGeneration && g.gapicToGenerate == "") ||
+		(g.gapicToGenerate != "" && !strings.Contains(g.gapicToGenerate, c.importPath)) ||
+		(g.forceAll && !c.stopGeneration) {
+		return false
+	}
+	return true
+}
+
 // RegenSnippets regenerates the snippets for all GAPICs configured to be generated.
 func (g *GapicGenerator) regenSnippets(ctx context.Context) error {
 	log.Println("regenerating snippets")
@@ -254,62 +266,6 @@
 	return c.Run()
 }
 
-// resetUnknownVersion resets doc.go files that have only had their version
-// changed to UNKNOWN by the generator.
-func (g *GapicGenerator) resetUnknownVersion() error {
-	files, err := git.FindModifiedFiles(g.googleCloudDir)
-	if err != nil {
-		return err
-	}
-
-	for _, file := range files {
-		if !strings.HasSuffix(file, "doc.go") {
-			continue
-		}
-		diff, err := git.FileDiff(g.googleCloudDir, file)
-		if err != nil {
-			return err
-		}
-		// More than one diff, don't reset.
-		if strings.Count(diff, "@@") != 2 {
-			log.Println(diff)
-			continue
-		}
-		// Not related to version, don't reset.
-		if !strings.Contains(diff, "+const versionClient = \"UNKNOWN\"") {
-			continue
-		}
-
-		if err := git.ResetFile(g.googleCloudDir, file); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// setVersion updates the versionClient constant in all .go files. It may create
-// .backup files on certain systems (darwin), and so should be followed by a
-// clean-up of .backup files.
-func (g *GapicGenerator) setVersion() error {
-	dirs, err := g.findModifiedDirs()
-	if err != nil {
-		return err
-	}
-	log.Println("updating client version")
-	for _, dir := range dirs {
-		c := execv.Command("bash", "-c", `
-ver=$(date +%Y%m%d)
-find . -path "*/doc.go" -exec sed -i.backup -e "s/^const versionClient.*/const versionClient = \"$ver\"/" '{}' +;
-find . -name '*.backup' -delete
-`)
-		c.Dir = dir
-		if err := c.Run(); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
 // microgen runs the microgenerator on a single microgen config.
 func (g *GapicGenerator) microgen(conf *microgenConfig) error {
 	log.Println("microgen generating", conf.pkg)
@@ -359,6 +315,33 @@
 	return c.Run()
 }
 
+func (g *GapicGenerator) genVersionFile(conf *microgenConfig) error {
+	relDir := strings.TrimPrefix(conf.importPath, "cloud.google.com/go/")
+	rootPackage := strings.Split(relDir, "/")[0]
+	rootModInternal := fmt.Sprintf("cloud.google.com/go/%s/internal", rootPackage)
+
+	f, err := os.Create(filepath.Join(g.googleCloudDir, relDir, "version.go"))
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	t := template.Must(template.New("version").Parse(versionTmpl))
+	versionData := struct {
+		Year               int
+		Package            string
+		ModuleRootInternal string
+	}{
+		Year:               time.Now().Year(),
+		Package:            conf.pkg,
+		ModuleRootInternal: rootModInternal,
+	}
+	if err := t.Execute(f, versionData); err != nil {
+		return err
+	}
+	return nil
+}
+
 // manifestEntry is used for JSON marshaling in manifest.
 type manifestEntry struct {
 	DistributionName  string      `json:"distribution_name"`
diff --git a/internal/gapicgen/go.mod b/internal/gapicgen/go.mod
index f3ee215..44b2182 100644
--- a/internal/gapicgen/go.mod
+++ b/internal/gapicgen/go.mod
@@ -1,14 +1,12 @@
 module cloud.google.com/go/internal/gapicgen
 
-go 1.16
+go 1.17
 
 require (
 	cloud.google.com/go v0.100.2
 	cloud.google.com/go/internal/godocfx v0.0.0-20220124075323-fc08c49fc013
 	github.com/google/go-github/v35 v35.3.0
 	github.com/shurcooL/githubv4 v0.0.0-20220115235240-a14260e6f8a2
-	github.com/shurcooL/graphql v0.0.0-20200928012149-18c5c3165e3a // indirect
-	github.com/stretchr/testify v1.7.0 // indirect
 	golang.org/x/oauth2 v0.0.0-20211104180415-d3ed0bb246c8
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
 	golang.org/x/sys v0.0.0-20220114195835-da31bd327af9
@@ -17,3 +15,25 @@
 	gopkg.in/src-d/go-git.v4 v4.13.1
 	gopkg.in/yaml.v2 v2.4.0
 )
+
+require (
+	github.com/emirpasic/gods v1.12.0 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/go-querystring v1.0.0 // indirect
+	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
+	github.com/kevinburke/ssh_config v0.0.0-20190725054713-01f96b0aa0cd // indirect
+	github.com/mitchellh/go-homedir v1.1.0 // indirect
+	github.com/sergi/go-diff v1.0.0 // indirect
+	github.com/shurcooL/graphql v0.0.0-20200928012149-18c5c3165e3a // indirect
+	github.com/src-d/gcfg v1.4.0 // indirect
+	github.com/stretchr/testify v1.7.0 // indirect
+	github.com/xanzy/ssh-agent v0.2.1 // indirect
+	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 // indirect
+	golang.org/x/mod v0.5.1 // indirect
+	golang.org/x/net v0.0.0-20211015210444-4f30a5c0130f // indirect
+	golang.org/x/tools v0.1.8 // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	gopkg.in/src-d/go-billy.v4 v4.3.2 // indirect
+	gopkg.in/warnings.v0 v0.1.2 // indirect
+)
diff --git a/iot/apiv1/device_manager_client.go b/iot/apiv1/device_manager_client.go
index a7766b3..89abee5 100644
--- a/iot/apiv1/device_manager_client.go
+++ b/iot/apiv1/device_manager_client.go
@@ -457,7 +457,7 @@
 // use by Google-written clients.
 func (c *deviceManagerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -474,6 +474,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDeviceRegistry[0:len((*c.CallOptions).CreateDeviceRegistry):len((*c.CallOptions).CreateDeviceRegistry)], opts...)
 	var resp *iotpb.DeviceRegistry
@@ -495,6 +496,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDeviceRegistry[0:len((*c.CallOptions).GetDeviceRegistry):len((*c.CallOptions).GetDeviceRegistry)], opts...)
 	var resp *iotpb.DeviceRegistry
@@ -516,6 +518,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "device_registry.name", url.QueryEscape(req.GetDeviceRegistry().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDeviceRegistry[0:len((*c.CallOptions).UpdateDeviceRegistry):len((*c.CallOptions).UpdateDeviceRegistry)], opts...)
 	var resp *iotpb.DeviceRegistry
@@ -537,6 +540,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDeviceRegistry[0:len((*c.CallOptions).DeleteDeviceRegistry):len((*c.CallOptions).DeleteDeviceRegistry)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -549,6 +553,7 @@
 
 func (c *deviceManagerGRPCClient) ListDeviceRegistries(ctx context.Context, req *iotpb.ListDeviceRegistriesRequest, opts ...gax.CallOption) *DeviceRegistryIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDeviceRegistries[0:len((*c.CallOptions).ListDeviceRegistries):len((*c.CallOptions).ListDeviceRegistries)], opts...)
 	it := &DeviceRegistryIterator{}
@@ -598,6 +603,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDevice[0:len((*c.CallOptions).CreateDevice):len((*c.CallOptions).CreateDevice)], opts...)
 	var resp *iotpb.Device
@@ -619,6 +625,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDevice[0:len((*c.CallOptions).GetDevice):len((*c.CallOptions).GetDevice)], opts...)
 	var resp *iotpb.Device
@@ -640,6 +647,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "device.name", url.QueryEscape(req.GetDevice().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDevice[0:len((*c.CallOptions).UpdateDevice):len((*c.CallOptions).UpdateDevice)], opts...)
 	var resp *iotpb.Device
@@ -661,6 +669,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDevice[0:len((*c.CallOptions).DeleteDevice):len((*c.CallOptions).DeleteDevice)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -673,6 +682,7 @@
 
 func (c *deviceManagerGRPCClient) ListDevices(ctx context.Context, req *iotpb.ListDevicesRequest, opts ...gax.CallOption) *DeviceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDevices[0:len((*c.CallOptions).ListDevices):len((*c.CallOptions).ListDevices)], opts...)
 	it := &DeviceIterator{}
@@ -722,6 +732,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ModifyCloudToDeviceConfig[0:len((*c.CallOptions).ModifyCloudToDeviceConfig):len((*c.CallOptions).ModifyCloudToDeviceConfig)], opts...)
 	var resp *iotpb.DeviceConfig
@@ -743,6 +754,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDeviceConfigVersions[0:len((*c.CallOptions).ListDeviceConfigVersions):len((*c.CallOptions).ListDeviceConfigVersions)], opts...)
 	var resp *iotpb.ListDeviceConfigVersionsResponse
@@ -764,6 +776,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDeviceStates[0:len((*c.CallOptions).ListDeviceStates):len((*c.CallOptions).ListDeviceStates)], opts...)
 	var resp *iotpb.ListDeviceStatesResponse
@@ -785,6 +798,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -806,6 +820,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -827,6 +842,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
@@ -848,6 +864,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SendCommandToDevice[0:len((*c.CallOptions).SendCommandToDevice):len((*c.CallOptions).SendCommandToDevice)], opts...)
 	var resp *iotpb.SendCommandToDeviceResponse
@@ -869,6 +886,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BindDeviceToGateway[0:len((*c.CallOptions).BindDeviceToGateway):len((*c.CallOptions).BindDeviceToGateway)], opts...)
 	var resp *iotpb.BindDeviceToGatewayResponse
@@ -890,6 +908,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UnbindDeviceFromGateway[0:len((*c.CallOptions).UnbindDeviceFromGateway):len((*c.CallOptions).UnbindDeviceFromGateway)], opts...)
 	var resp *iotpb.UnbindDeviceFromGatewayResponse
diff --git a/iot/apiv1/doc.go b/iot/apiv1/doc.go
index b3ca580..c1908fd 100644
--- a/iot/apiv1/doc.go
+++ b/iot/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/iot/apiv1/version.go b/iot/apiv1/version.go
new file mode 100644
index 0000000..fe0bb09
--- /dev/null
+++ b/iot/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package iot
+
+import "cloud.google.com/go/iot/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/kms/apiv1/doc.go b/kms/apiv1/doc.go
index 8cad5a1..5993df6 100644
--- a/kms/apiv1/doc.go
+++ b/kms/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/kms/apiv1/ekm_client.go b/kms/apiv1/ekm_client.go
index 8adee44..46118bd 100644
--- a/kms/apiv1/ekm_client.go
+++ b/kms/apiv1/ekm_client.go
@@ -296,7 +296,7 @@
 // use by Google-written clients.
 func (c *ekmGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -308,6 +308,7 @@
 
 func (c *ekmGRPCClient) ListEkmConnections(ctx context.Context, req *kmspb.ListEkmConnectionsRequest, opts ...gax.CallOption) *EkmConnectionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEkmConnections[0:len((*c.CallOptions).ListEkmConnections):len((*c.CallOptions).ListEkmConnections)], opts...)
 	it := &EkmConnectionIterator{}
@@ -357,6 +358,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEkmConnection[0:len((*c.CallOptions).GetEkmConnection):len((*c.CallOptions).GetEkmConnection)], opts...)
 	var resp *kmspb.EkmConnection
@@ -378,6 +380,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEkmConnection[0:len((*c.CallOptions).CreateEkmConnection):len((*c.CallOptions).CreateEkmConnection)], opts...)
 	var resp *kmspb.EkmConnection
@@ -399,6 +402,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "ekm_connection.name", url.QueryEscape(req.GetEkmConnection().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEkmConnection[0:len((*c.CallOptions).UpdateEkmConnection):len((*c.CallOptions).UpdateEkmConnection)], opts...)
 	var resp *kmspb.EkmConnection
diff --git a/kms/apiv1/key_management_client.go b/kms/apiv1/key_management_client.go
index 725ae9c..bf1ff6b 100644
--- a/kms/apiv1/key_management_client.go
+++ b/kms/apiv1/key_management_client.go
@@ -802,7 +802,7 @@
 // use by Google-written clients.
 func (c *keyManagementGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -814,6 +814,7 @@
 
 func (c *keyManagementGRPCClient) ListKeyRings(ctx context.Context, req *kmspb.ListKeyRingsRequest, opts ...gax.CallOption) *KeyRingIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListKeyRings[0:len((*c.CallOptions).ListKeyRings):len((*c.CallOptions).ListKeyRings)], opts...)
 	it := &KeyRingIterator{}
@@ -858,6 +859,7 @@
 
 func (c *keyManagementGRPCClient) ListCryptoKeys(ctx context.Context, req *kmspb.ListCryptoKeysRequest, opts ...gax.CallOption) *CryptoKeyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCryptoKeys[0:len((*c.CallOptions).ListCryptoKeys):len((*c.CallOptions).ListCryptoKeys)], opts...)
 	it := &CryptoKeyIterator{}
@@ -902,6 +904,7 @@
 
 func (c *keyManagementGRPCClient) ListCryptoKeyVersions(ctx context.Context, req *kmspb.ListCryptoKeyVersionsRequest, opts ...gax.CallOption) *CryptoKeyVersionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCryptoKeyVersions[0:len((*c.CallOptions).ListCryptoKeyVersions):len((*c.CallOptions).ListCryptoKeyVersions)], opts...)
 	it := &CryptoKeyVersionIterator{}
@@ -946,6 +949,7 @@
 
 func (c *keyManagementGRPCClient) ListImportJobs(ctx context.Context, req *kmspb.ListImportJobsRequest, opts ...gax.CallOption) *ImportJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListImportJobs[0:len((*c.CallOptions).ListImportJobs):len((*c.CallOptions).ListImportJobs)], opts...)
 	it := &ImportJobIterator{}
@@ -995,6 +999,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetKeyRing[0:len((*c.CallOptions).GetKeyRing):len((*c.CallOptions).GetKeyRing)], opts...)
 	var resp *kmspb.KeyRing
@@ -1016,6 +1021,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCryptoKey[0:len((*c.CallOptions).GetCryptoKey):len((*c.CallOptions).GetCryptoKey)], opts...)
 	var resp *kmspb.CryptoKey
@@ -1037,6 +1043,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCryptoKeyVersion[0:len((*c.CallOptions).GetCryptoKeyVersion):len((*c.CallOptions).GetCryptoKeyVersion)], opts...)
 	var resp *kmspb.CryptoKeyVersion
@@ -1058,6 +1065,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPublicKey[0:len((*c.CallOptions).GetPublicKey):len((*c.CallOptions).GetPublicKey)], opts...)
 	var resp *kmspb.PublicKey
@@ -1079,6 +1087,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetImportJob[0:len((*c.CallOptions).GetImportJob):len((*c.CallOptions).GetImportJob)], opts...)
 	var resp *kmspb.ImportJob
@@ -1100,6 +1109,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateKeyRing[0:len((*c.CallOptions).CreateKeyRing):len((*c.CallOptions).CreateKeyRing)], opts...)
 	var resp *kmspb.KeyRing
@@ -1121,6 +1131,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCryptoKey[0:len((*c.CallOptions).CreateCryptoKey):len((*c.CallOptions).CreateCryptoKey)], opts...)
 	var resp *kmspb.CryptoKey
@@ -1142,6 +1153,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCryptoKeyVersion[0:len((*c.CallOptions).CreateCryptoKeyVersion):len((*c.CallOptions).CreateCryptoKeyVersion)], opts...)
 	var resp *kmspb.CryptoKeyVersion
@@ -1163,6 +1175,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportCryptoKeyVersion[0:len((*c.CallOptions).ImportCryptoKeyVersion):len((*c.CallOptions).ImportCryptoKeyVersion)], opts...)
 	var resp *kmspb.CryptoKeyVersion
@@ -1184,6 +1197,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateImportJob[0:len((*c.CallOptions).CreateImportJob):len((*c.CallOptions).CreateImportJob)], opts...)
 	var resp *kmspb.ImportJob
@@ -1205,6 +1219,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "crypto_key.name", url.QueryEscape(req.GetCryptoKey().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCryptoKey[0:len((*c.CallOptions).UpdateCryptoKey):len((*c.CallOptions).UpdateCryptoKey)], opts...)
 	var resp *kmspb.CryptoKey
@@ -1226,6 +1241,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "crypto_key_version.name", url.QueryEscape(req.GetCryptoKeyVersion().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCryptoKeyVersion[0:len((*c.CallOptions).UpdateCryptoKeyVersion):len((*c.CallOptions).UpdateCryptoKeyVersion)], opts...)
 	var resp *kmspb.CryptoKeyVersion
@@ -1247,6 +1263,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCryptoKeyPrimaryVersion[0:len((*c.CallOptions).UpdateCryptoKeyPrimaryVersion):len((*c.CallOptions).UpdateCryptoKeyPrimaryVersion)], opts...)
 	var resp *kmspb.CryptoKey
@@ -1268,6 +1285,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DestroyCryptoKeyVersion[0:len((*c.CallOptions).DestroyCryptoKeyVersion):len((*c.CallOptions).DestroyCryptoKeyVersion)], opts...)
 	var resp *kmspb.CryptoKeyVersion
@@ -1289,6 +1307,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RestoreCryptoKeyVersion[0:len((*c.CallOptions).RestoreCryptoKeyVersion):len((*c.CallOptions).RestoreCryptoKeyVersion)], opts...)
 	var resp *kmspb.CryptoKeyVersion
@@ -1310,6 +1329,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Encrypt[0:len((*c.CallOptions).Encrypt):len((*c.CallOptions).Encrypt)], opts...)
 	var resp *kmspb.EncryptResponse
@@ -1331,6 +1351,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Decrypt[0:len((*c.CallOptions).Decrypt):len((*c.CallOptions).Decrypt)], opts...)
 	var resp *kmspb.DecryptResponse
@@ -1352,6 +1373,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AsymmetricSign[0:len((*c.CallOptions).AsymmetricSign):len((*c.CallOptions).AsymmetricSign)], opts...)
 	var resp *kmspb.AsymmetricSignResponse
@@ -1373,6 +1395,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AsymmetricDecrypt[0:len((*c.CallOptions).AsymmetricDecrypt):len((*c.CallOptions).AsymmetricDecrypt)], opts...)
 	var resp *kmspb.AsymmetricDecryptResponse
@@ -1394,6 +1417,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MacSign[0:len((*c.CallOptions).MacSign):len((*c.CallOptions).MacSign)], opts...)
 	var resp *kmspb.MacSignResponse
@@ -1415,6 +1439,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MacVerify[0:len((*c.CallOptions).MacVerify):len((*c.CallOptions).MacVerify)], opts...)
 	var resp *kmspb.MacVerifyResponse
@@ -1436,6 +1461,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "location", url.QueryEscape(req.GetLocation())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GenerateRandomBytes[0:len((*c.CallOptions).GenerateRandomBytes):len((*c.CallOptions).GenerateRandomBytes)], opts...)
 	var resp *kmspb.GenerateRandomBytesResponse
diff --git a/kms/apiv1/version.go b/kms/apiv1/version.go
new file mode 100644
index 0000000..03fc753
--- /dev/null
+++ b/kms/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package kms
+
+import "cloud.google.com/go/kms/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/language/apiv1/doc.go b/language/apiv1/doc.go
index 59c2842..9b89fc6 100644
--- a/language/apiv1/doc.go
+++ b/language/apiv1/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/language/apiv1/language_client.go b/language/apiv1/language_client.go
index c8092dd..661f342 100644
--- a/language/apiv1/language_client.go
+++ b/language/apiv1/language_client.go
@@ -287,7 +287,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/language/apiv1/version.go b/language/apiv1/version.go
new file mode 100644
index 0000000..073beaa
--- /dev/null
+++ b/language/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package language
+
+import "cloud.google.com/go/language/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/language/apiv1beta2/doc.go b/language/apiv1beta2/doc.go
index 4f6cf61..da93b9d 100644
--- a/language/apiv1beta2/doc.go
+++ b/language/apiv1beta2/doc.go
@@ -88,7 +88,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/language/apiv1beta2/language_client.go b/language/apiv1beta2/language_client.go
index b242cc1..5820da1 100644
--- a/language/apiv1beta2/language_client.go
+++ b/language/apiv1beta2/language_client.go
@@ -287,7 +287,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/language/apiv1beta2/version.go b/language/apiv1beta2/version.go
new file mode 100644
index 0000000..073beaa
--- /dev/null
+++ b/language/apiv1beta2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package language
+
+import "cloud.google.com/go/language/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/lifesciences/apiv2beta/doc.go b/lifesciences/apiv2beta/doc.go
index 90e534b..cd78be8 100644
--- a/lifesciences/apiv2beta/doc.go
+++ b/lifesciences/apiv2beta/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/lifesciences/apiv2beta/version.go b/lifesciences/apiv2beta/version.go
new file mode 100644
index 0000000..b9ca434
--- /dev/null
+++ b/lifesciences/apiv2beta/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package lifesciences
+
+import "cloud.google.com/go/lifesciences/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/lifesciences/apiv2beta/workflows_service_v2_beta_client.go b/lifesciences/apiv2beta/workflows_service_v2_beta_client.go
index 7023ac8..6761064 100644
--- a/lifesciences/apiv2beta/workflows_service_v2_beta_client.go
+++ b/lifesciences/apiv2beta/workflows_service_v2_beta_client.go
@@ -223,7 +223,7 @@
 // use by Google-written clients.
 func (c *workflowsServiceV2BetaGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -240,6 +240,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunPipeline[0:len((*c.CallOptions).RunPipeline):len((*c.CallOptions).RunPipeline)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/logging/apiv2/config_client.go b/logging/apiv2/config_client.go
index 95ae03a..f90ec6b 100644
--- a/logging/apiv2/config_client.go
+++ b/logging/apiv2/config_client.go
@@ -573,7 +573,7 @@
 // use by Google-written clients.
 func (c *configGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -585,6 +585,7 @@
 
 func (c *configGRPCClient) ListBuckets(ctx context.Context, req *loggingpb.ListBucketsRequest, opts ...gax.CallOption) *LogBucketIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBuckets[0:len((*c.CallOptions).ListBuckets):len((*c.CallOptions).ListBuckets)], opts...)
 	it := &LogBucketIterator{}
@@ -629,6 +630,7 @@
 
 func (c *configGRPCClient) GetBucket(ctx context.Context, req *loggingpb.GetBucketRequest, opts ...gax.CallOption) (*loggingpb.LogBucket, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBucket[0:len((*c.CallOptions).GetBucket):len((*c.CallOptions).GetBucket)], opts...)
 	var resp *loggingpb.LogBucket
@@ -645,6 +647,7 @@
 
 func (c *configGRPCClient) CreateBucket(ctx context.Context, req *loggingpb.CreateBucketRequest, opts ...gax.CallOption) (*loggingpb.LogBucket, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBucket[0:len((*c.CallOptions).CreateBucket):len((*c.CallOptions).CreateBucket)], opts...)
 	var resp *loggingpb.LogBucket
@@ -661,6 +664,7 @@
 
 func (c *configGRPCClient) UpdateBucket(ctx context.Context, req *loggingpb.UpdateBucketRequest, opts ...gax.CallOption) (*loggingpb.LogBucket, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateBucket[0:len((*c.CallOptions).UpdateBucket):len((*c.CallOptions).UpdateBucket)], opts...)
 	var resp *loggingpb.LogBucket
@@ -677,6 +681,7 @@
 
 func (c *configGRPCClient) DeleteBucket(ctx context.Context, req *loggingpb.DeleteBucketRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteBucket[0:len((*c.CallOptions).DeleteBucket):len((*c.CallOptions).DeleteBucket)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -689,6 +694,7 @@
 
 func (c *configGRPCClient) UndeleteBucket(ctx context.Context, req *loggingpb.UndeleteBucketRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UndeleteBucket[0:len((*c.CallOptions).UndeleteBucket):len((*c.CallOptions).UndeleteBucket)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -701,6 +707,7 @@
 
 func (c *configGRPCClient) ListViews(ctx context.Context, req *loggingpb.ListViewsRequest, opts ...gax.CallOption) *LogViewIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListViews[0:len((*c.CallOptions).ListViews):len((*c.CallOptions).ListViews)], opts...)
 	it := &LogViewIterator{}
@@ -745,6 +752,7 @@
 
 func (c *configGRPCClient) GetView(ctx context.Context, req *loggingpb.GetViewRequest, opts ...gax.CallOption) (*loggingpb.LogView, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetView[0:len((*c.CallOptions).GetView):len((*c.CallOptions).GetView)], opts...)
 	var resp *loggingpb.LogView
@@ -761,6 +769,7 @@
 
 func (c *configGRPCClient) CreateView(ctx context.Context, req *loggingpb.CreateViewRequest, opts ...gax.CallOption) (*loggingpb.LogView, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateView[0:len((*c.CallOptions).CreateView):len((*c.CallOptions).CreateView)], opts...)
 	var resp *loggingpb.LogView
@@ -777,6 +786,7 @@
 
 func (c *configGRPCClient) UpdateView(ctx context.Context, req *loggingpb.UpdateViewRequest, opts ...gax.CallOption) (*loggingpb.LogView, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateView[0:len((*c.CallOptions).UpdateView):len((*c.CallOptions).UpdateView)], opts...)
 	var resp *loggingpb.LogView
@@ -793,6 +803,7 @@
 
 func (c *configGRPCClient) DeleteView(ctx context.Context, req *loggingpb.DeleteViewRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteView[0:len((*c.CallOptions).DeleteView):len((*c.CallOptions).DeleteView)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -805,6 +816,7 @@
 
 func (c *configGRPCClient) ListSinks(ctx context.Context, req *loggingpb.ListSinksRequest, opts ...gax.CallOption) *LogSinkIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSinks[0:len((*c.CallOptions).ListSinks):len((*c.CallOptions).ListSinks)], opts...)
 	it := &LogSinkIterator{}
@@ -854,6 +866,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "sink_name", url.QueryEscape(req.GetSinkName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSink[0:len((*c.CallOptions).GetSink):len((*c.CallOptions).GetSink)], opts...)
 	var resp *loggingpb.LogSink
@@ -875,6 +888,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSink[0:len((*c.CallOptions).CreateSink):len((*c.CallOptions).CreateSink)], opts...)
 	var resp *loggingpb.LogSink
@@ -896,6 +910,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "sink_name", url.QueryEscape(req.GetSinkName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSink[0:len((*c.CallOptions).UpdateSink):len((*c.CallOptions).UpdateSink)], opts...)
 	var resp *loggingpb.LogSink
@@ -917,6 +932,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "sink_name", url.QueryEscape(req.GetSinkName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSink[0:len((*c.CallOptions).DeleteSink):len((*c.CallOptions).DeleteSink)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -929,6 +945,7 @@
 
 func (c *configGRPCClient) ListExclusions(ctx context.Context, req *loggingpb.ListExclusionsRequest, opts ...gax.CallOption) *LogExclusionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListExclusions[0:len((*c.CallOptions).ListExclusions):len((*c.CallOptions).ListExclusions)], opts...)
 	it := &LogExclusionIterator{}
@@ -978,6 +995,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetExclusion[0:len((*c.CallOptions).GetExclusion):len((*c.CallOptions).GetExclusion)], opts...)
 	var resp *loggingpb.LogExclusion
@@ -999,6 +1017,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateExclusion[0:len((*c.CallOptions).CreateExclusion):len((*c.CallOptions).CreateExclusion)], opts...)
 	var resp *loggingpb.LogExclusion
@@ -1020,6 +1039,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateExclusion[0:len((*c.CallOptions).UpdateExclusion):len((*c.CallOptions).UpdateExclusion)], opts...)
 	var resp *loggingpb.LogExclusion
@@ -1041,6 +1061,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteExclusion[0:len((*c.CallOptions).DeleteExclusion):len((*c.CallOptions).DeleteExclusion)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1053,6 +1074,7 @@
 
 func (c *configGRPCClient) GetCmekSettings(ctx context.Context, req *loggingpb.GetCmekSettingsRequest, opts ...gax.CallOption) (*loggingpb.CmekSettings, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCmekSettings[0:len((*c.CallOptions).GetCmekSettings):len((*c.CallOptions).GetCmekSettings)], opts...)
 	var resp *loggingpb.CmekSettings
@@ -1069,6 +1091,7 @@
 
 func (c *configGRPCClient) UpdateCmekSettings(ctx context.Context, req *loggingpb.UpdateCmekSettingsRequest, opts ...gax.CallOption) (*loggingpb.CmekSettings, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCmekSettings[0:len((*c.CallOptions).UpdateCmekSettings):len((*c.CallOptions).UpdateCmekSettings)], opts...)
 	var resp *loggingpb.CmekSettings
@@ -1085,6 +1108,7 @@
 
 func (c *configGRPCClient) GetSettings(ctx context.Context, req *loggingpb.GetSettingsRequest, opts ...gax.CallOption) (*loggingpb.Settings, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSettings[0:len((*c.CallOptions).GetSettings):len((*c.CallOptions).GetSettings)], opts...)
 	var resp *loggingpb.Settings
@@ -1101,6 +1125,7 @@
 
 func (c *configGRPCClient) UpdateSettings(ctx context.Context, req *loggingpb.UpdateSettingsRequest, opts ...gax.CallOption) (*loggingpb.Settings, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSettings[0:len((*c.CallOptions).UpdateSettings):len((*c.CallOptions).UpdateSettings)], opts...)
 	var resp *loggingpb.Settings
diff --git a/logging/apiv2/doc.go b/logging/apiv2/doc.go
index 068cfdb..4fcf153 100644
--- a/logging/apiv2/doc.go
+++ b/logging/apiv2/doc.go
@@ -17,17 +17,13 @@
 // Package logging is an auto-generated package for the
 // Cloud Logging API.
 //
-// Writes log entries and manages your Cloud Logging configuration. The table
-// entries below are presented in alphabetical order, not in order of common
-// use. For explanations of the concepts found in the table entries, read the
-// documentation at https://cloud.google.com/logging/docs (at
-// https://cloud.google.com/logging/docs).
+// Writes log entries and manages your Cloud Logging configuration.
 //
 // Example usage
 //
 // To get started with this package, create a client.
 //  ctx := context.Background()
-//  c, err := logging.NewConfigClient(ctx)
+//  c, err := logging.NewClient(ctx)
 //  if err != nil {
 //  	// TODO: Handle error.
 //  }
@@ -42,27 +38,19 @@
 // The following is an example of making an API call with the newly created client.
 //
 //  ctx := context.Background()
-//  c, err := logging.NewConfigClient(ctx)
+//  c, err := logging.NewClient(ctx)
 //  if err != nil {
 //  	// TODO: Handle error.
 //  }
 //  defer c.Close()
 //
-//  req := &loggingpb.ListBucketsRequest{
+//  req := &loggingpb.DeleteLogRequest{
 //  	// TODO: Fill request struct fields.
-//  	// See https://pkg.go.dev/google.golang.org/genproto/googleapis/logging/v2#ListBucketsRequest.
+//  	// See https://pkg.go.dev/google.golang.org/genproto/googleapis/logging/v2#DeleteLogRequest.
 //  }
-//  it := c.ListBuckets(ctx, req)
-//  for {
-//  	resp, err := it.Next()
-//  	if err == iterator.Done {
-//  		break
-//  	}
-//  	if err != nil {
-//  		// TODO: Handle error.
-//  	}
-//  	// TODO: Use resp.
-//  	_ = resp
+//  err = c.DeleteLog(ctx, req)
+//  if err != nil {
+//  	// TODO: Handle error.
 //  }
 //
 // Use of Context
@@ -94,7 +82,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/logging/apiv2/logging_client.go b/logging/apiv2/logging_client.go
index fdd73ab..f5a3304 100644
--- a/logging/apiv2/logging_client.go
+++ b/logging/apiv2/logging_client.go
@@ -304,7 +304,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -321,6 +321,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "log_name", url.QueryEscape(req.GetLogName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteLog[0:len((*c.CallOptions).DeleteLog):len((*c.CallOptions).DeleteLog)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -439,6 +440,7 @@
 
 func (c *gRPCClient) ListLogs(ctx context.Context, req *loggingpb.ListLogsRequest, opts ...gax.CallOption) *StringIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListLogs[0:len((*c.CallOptions).ListLogs):len((*c.CallOptions).ListLogs)], opts...)
 	it := &StringIterator{}
diff --git a/logging/apiv2/metrics_client.go b/logging/apiv2/metrics_client.go
index ed06198..4b14ede 100644
--- a/logging/apiv2/metrics_client.go
+++ b/logging/apiv2/metrics_client.go
@@ -257,7 +257,7 @@
 // use by Google-written clients.
 func (c *metricsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -269,6 +269,7 @@
 
 func (c *metricsGRPCClient) ListLogMetrics(ctx context.Context, req *loggingpb.ListLogMetricsRequest, opts ...gax.CallOption) *LogMetricIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListLogMetrics[0:len((*c.CallOptions).ListLogMetrics):len((*c.CallOptions).ListLogMetrics)], opts...)
 	it := &LogMetricIterator{}
@@ -318,6 +319,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "metric_name", url.QueryEscape(req.GetMetricName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetLogMetric[0:len((*c.CallOptions).GetLogMetric):len((*c.CallOptions).GetLogMetric)], opts...)
 	var resp *loggingpb.LogMetric
@@ -339,6 +341,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateLogMetric[0:len((*c.CallOptions).CreateLogMetric):len((*c.CallOptions).CreateLogMetric)], opts...)
 	var resp *loggingpb.LogMetric
@@ -360,6 +363,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "metric_name", url.QueryEscape(req.GetMetricName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateLogMetric[0:len((*c.CallOptions).UpdateLogMetric):len((*c.CallOptions).UpdateLogMetric)], opts...)
 	var resp *loggingpb.LogMetric
@@ -381,6 +385,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "metric_name", url.QueryEscape(req.GetMetricName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteLogMetric[0:len((*c.CallOptions).DeleteLogMetric):len((*c.CallOptions).DeleteLogMetric)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/logging/apiv2/version.go b/logging/apiv2/version.go
new file mode 100644
index 0000000..2de6c54
--- /dev/null
+++ b/logging/apiv2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package logging
+
+import "cloud.google.com/go/logging/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/managedidentities/apiv1/doc.go b/managedidentities/apiv1/doc.go
index ed76887..46cca51 100644
--- a/managedidentities/apiv1/doc.go
+++ b/managedidentities/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/managedidentities/apiv1/managed_identities_client.go b/managedidentities/apiv1/managed_identities_client.go
index 973abef..1f3f589 100644
--- a/managedidentities/apiv1/managed_identities_client.go
+++ b/managedidentities/apiv1/managed_identities_client.go
@@ -398,7 +398,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -415,6 +415,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMicrosoftAdDomain[0:len((*c.CallOptions).CreateMicrosoftAdDomain):len((*c.CallOptions).CreateMicrosoftAdDomain)], opts...)
 	var resp *longrunningpb.Operation
@@ -438,6 +439,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResetAdminPassword[0:len((*c.CallOptions).ResetAdminPassword):len((*c.CallOptions).ResetAdminPassword)], opts...)
 	var resp *managedidentitiespb.ResetAdminPasswordResponse
@@ -454,6 +456,7 @@
 
 func (c *gRPCClient) ListDomains(ctx context.Context, req *managedidentitiespb.ListDomainsRequest, opts ...gax.CallOption) *DomainIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDomains[0:len((*c.CallOptions).ListDomains):len((*c.CallOptions).ListDomains)], opts...)
 	it := &DomainIterator{}
@@ -503,6 +506,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDomain[0:len((*c.CallOptions).GetDomain):len((*c.CallOptions).GetDomain)], opts...)
 	var resp *managedidentitiespb.Domain
@@ -524,6 +528,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "domain.name", url.QueryEscape(req.GetDomain().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDomain[0:len((*c.CallOptions).UpdateDomain):len((*c.CallOptions).UpdateDomain)], opts...)
 	var resp *longrunningpb.Operation
@@ -547,6 +552,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDomain[0:len((*c.CallOptions).DeleteDomain):len((*c.CallOptions).DeleteDomain)], opts...)
 	var resp *longrunningpb.Operation
@@ -570,6 +576,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AttachTrust[0:len((*c.CallOptions).AttachTrust):len((*c.CallOptions).AttachTrust)], opts...)
 	var resp *longrunningpb.Operation
@@ -593,6 +600,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReconfigureTrust[0:len((*c.CallOptions).ReconfigureTrust):len((*c.CallOptions).ReconfigureTrust)], opts...)
 	var resp *longrunningpb.Operation
@@ -616,6 +624,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DetachTrust[0:len((*c.CallOptions).DetachTrust):len((*c.CallOptions).DetachTrust)], opts...)
 	var resp *longrunningpb.Operation
@@ -639,6 +648,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ValidateTrust[0:len((*c.CallOptions).ValidateTrust):len((*c.CallOptions).ValidateTrust)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/managedidentities/apiv1/version.go b/managedidentities/apiv1/version.go
new file mode 100644
index 0000000..1670e91
--- /dev/null
+++ b/managedidentities/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package managedidentities
+
+import "cloud.google.com/go/managedidentities/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/mediatranslation/apiv1beta1/doc.go b/mediatranslation/apiv1beta1/doc.go
index 5f4b1cc..6af644b 100644
--- a/mediatranslation/apiv1beta1/doc.go
+++ b/mediatranslation/apiv1beta1/doc.go
@@ -99,7 +99,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/mediatranslation/apiv1beta1/speech_translation_client.go b/mediatranslation/apiv1beta1/speech_translation_client.go
index 53ff16e..82b3ba6 100644
--- a/mediatranslation/apiv1beta1/speech_translation_client.go
+++ b/mediatranslation/apiv1beta1/speech_translation_client.go
@@ -172,7 +172,7 @@
 // use by Google-written clients.
 func (c *speechTranslationGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/mediatranslation/apiv1beta1/version.go b/mediatranslation/apiv1beta1/version.go
new file mode 100644
index 0000000..643a792
--- /dev/null
+++ b/mediatranslation/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package mediatranslation
+
+import "cloud.google.com/go/mediatranslation/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/memcache/apiv1/cloud_memcache_client.go b/memcache/apiv1/cloud_memcache_client.go
index 6ce97e6..eb91ccd 100644
--- a/memcache/apiv1/cloud_memcache_client.go
+++ b/memcache/apiv1/cloud_memcache_client.go
@@ -322,7 +322,7 @@
 // use by Google-written clients.
 func (c *cloudMemcacheGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -334,6 +334,7 @@
 
 func (c *cloudMemcacheGRPCClient) ListInstances(ctx context.Context, req *memcachepb.ListInstancesRequest, opts ...gax.CallOption) *InstanceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInstances[0:len((*c.CallOptions).ListInstances):len((*c.CallOptions).ListInstances)], opts...)
 	it := &InstanceIterator{}
@@ -383,6 +384,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstance[0:len((*c.CallOptions).GetInstance):len((*c.CallOptions).GetInstance)], opts...)
 	var resp *memcachepb.Instance
@@ -404,6 +406,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateInstance[0:len((*c.CallOptions).CreateInstance):len((*c.CallOptions).CreateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -427,6 +430,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "instance.name", url.QueryEscape(req.GetInstance().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateInstance[0:len((*c.CallOptions).UpdateInstance):len((*c.CallOptions).UpdateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -450,6 +454,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateParameters[0:len((*c.CallOptions).UpdateParameters):len((*c.CallOptions).UpdateParameters)], opts...)
 	var resp *longrunningpb.Operation
@@ -473,6 +478,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteInstance[0:len((*c.CallOptions).DeleteInstance):len((*c.CallOptions).DeleteInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -496,6 +502,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ApplyParameters[0:len((*c.CallOptions).ApplyParameters):len((*c.CallOptions).ApplyParameters)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/memcache/apiv1/doc.go b/memcache/apiv1/doc.go
index 9eda5b8..a749da1 100644
--- a/memcache/apiv1/doc.go
+++ b/memcache/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/memcache/apiv1/version.go b/memcache/apiv1/version.go
new file mode 100644
index 0000000..2ead5bd
--- /dev/null
+++ b/memcache/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package memcache
+
+import "cloud.google.com/go/memcache/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/memcache/apiv1beta2/cloud_memcache_client.go b/memcache/apiv1beta2/cloud_memcache_client.go
index 2660c18..97643d4 100644
--- a/memcache/apiv1beta2/cloud_memcache_client.go
+++ b/memcache/apiv1beta2/cloud_memcache_client.go
@@ -338,7 +338,7 @@
 // use by Google-written clients.
 func (c *cloudMemcacheGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -350,6 +350,7 @@
 
 func (c *cloudMemcacheGRPCClient) ListInstances(ctx context.Context, req *memcachepb.ListInstancesRequest, opts ...gax.CallOption) *InstanceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInstances[0:len((*c.CallOptions).ListInstances):len((*c.CallOptions).ListInstances)], opts...)
 	it := &InstanceIterator{}
@@ -399,6 +400,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstance[0:len((*c.CallOptions).GetInstance):len((*c.CallOptions).GetInstance)], opts...)
 	var resp *memcachepb.Instance
@@ -420,6 +422,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateInstance[0:len((*c.CallOptions).CreateInstance):len((*c.CallOptions).CreateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -443,6 +446,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource.name", url.QueryEscape(req.GetResource().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateInstance[0:len((*c.CallOptions).UpdateInstance):len((*c.CallOptions).UpdateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -466,6 +470,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateParameters[0:len((*c.CallOptions).UpdateParameters):len((*c.CallOptions).UpdateParameters)], opts...)
 	var resp *longrunningpb.Operation
@@ -489,6 +494,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteInstance[0:len((*c.CallOptions).DeleteInstance):len((*c.CallOptions).DeleteInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -512,6 +518,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ApplyParameters[0:len((*c.CallOptions).ApplyParameters):len((*c.CallOptions).ApplyParameters)], opts...)
 	var resp *longrunningpb.Operation
@@ -535,6 +542,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "instance", url.QueryEscape(req.GetInstance())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ApplySoftwareUpdate[0:len((*c.CallOptions).ApplySoftwareUpdate):len((*c.CallOptions).ApplySoftwareUpdate)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/memcache/apiv1beta2/doc.go b/memcache/apiv1beta2/doc.go
index 1f197a9..aa7e888 100644
--- a/memcache/apiv1beta2/doc.go
+++ b/memcache/apiv1beta2/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/memcache/apiv1beta2/version.go b/memcache/apiv1beta2/version.go
new file mode 100644
index 0000000..2ead5bd
--- /dev/null
+++ b/memcache/apiv1beta2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package memcache
+
+import "cloud.google.com/go/memcache/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/metastore/apiv1/dataproc_metastore_client.go b/metastore/apiv1/dataproc_metastore_client.go
index 44a7d5b..cc696e3 100644
--- a/metastore/apiv1/dataproc_metastore_client.go
+++ b/metastore/apiv1/dataproc_metastore_client.go
@@ -475,7 +475,7 @@
 // use by Google-written clients.
 func (c *dataprocMetastoreGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -487,6 +487,7 @@
 
 func (c *dataprocMetastoreGRPCClient) ListServices(ctx context.Context, req *metastorepb.ListServicesRequest, opts ...gax.CallOption) *ServiceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServices[0:len((*c.CallOptions).ListServices):len((*c.CallOptions).ListServices)], opts...)
 	it := &ServiceIterator{}
@@ -536,6 +537,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetService[0:len((*c.CallOptions).GetService):len((*c.CallOptions).GetService)], opts...)
 	var resp *metastorepb.Service
@@ -557,6 +559,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateService[0:len((*c.CallOptions).CreateService):len((*c.CallOptions).CreateService)], opts...)
 	var resp *longrunningpb.Operation
@@ -580,6 +583,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service.name", url.QueryEscape(req.GetService().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateService[0:len((*c.CallOptions).UpdateService):len((*c.CallOptions).UpdateService)], opts...)
 	var resp *longrunningpb.Operation
@@ -603,6 +607,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteService[0:len((*c.CallOptions).DeleteService):len((*c.CallOptions).DeleteService)], opts...)
 	var resp *longrunningpb.Operation
@@ -621,6 +626,7 @@
 
 func (c *dataprocMetastoreGRPCClient) ListMetadataImports(ctx context.Context, req *metastorepb.ListMetadataImportsRequest, opts ...gax.CallOption) *MetadataImportIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMetadataImports[0:len((*c.CallOptions).ListMetadataImports):len((*c.CallOptions).ListMetadataImports)], opts...)
 	it := &MetadataImportIterator{}
@@ -670,6 +676,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMetadataImport[0:len((*c.CallOptions).GetMetadataImport):len((*c.CallOptions).GetMetadataImport)], opts...)
 	var resp *metastorepb.MetadataImport
@@ -691,6 +698,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMetadataImport[0:len((*c.CallOptions).CreateMetadataImport):len((*c.CallOptions).CreateMetadataImport)], opts...)
 	var resp *longrunningpb.Operation
@@ -714,6 +722,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "metadata_import.name", url.QueryEscape(req.GetMetadataImport().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateMetadataImport[0:len((*c.CallOptions).UpdateMetadataImport):len((*c.CallOptions).UpdateMetadataImport)], opts...)
 	var resp *longrunningpb.Operation
@@ -737,6 +746,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service", url.QueryEscape(req.GetService())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportMetadata[0:len((*c.CallOptions).ExportMetadata):len((*c.CallOptions).ExportMetadata)], opts...)
 	var resp *longrunningpb.Operation
@@ -760,6 +770,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service", url.QueryEscape(req.GetService())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RestoreService[0:len((*c.CallOptions).RestoreService):len((*c.CallOptions).RestoreService)], opts...)
 	var resp *longrunningpb.Operation
@@ -778,6 +789,7 @@
 
 func (c *dataprocMetastoreGRPCClient) ListBackups(ctx context.Context, req *metastorepb.ListBackupsRequest, opts ...gax.CallOption) *BackupIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBackups[0:len((*c.CallOptions).ListBackups):len((*c.CallOptions).ListBackups)], opts...)
 	it := &BackupIterator{}
@@ -827,6 +839,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBackup[0:len((*c.CallOptions).GetBackup):len((*c.CallOptions).GetBackup)], opts...)
 	var resp *metastorepb.Backup
@@ -848,6 +861,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBackup[0:len((*c.CallOptions).CreateBackup):len((*c.CallOptions).CreateBackup)], opts...)
 	var resp *longrunningpb.Operation
@@ -871,6 +885,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteBackup[0:len((*c.CallOptions).DeleteBackup):len((*c.CallOptions).DeleteBackup)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/metastore/apiv1/doc.go b/metastore/apiv1/doc.go
index 0368b05..fd7f5f2 100644
--- a/metastore/apiv1/doc.go
+++ b/metastore/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/metastore/apiv1/version.go b/metastore/apiv1/version.go
new file mode 100644
index 0000000..ebf5ad8
--- /dev/null
+++ b/metastore/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package metastore
+
+import "cloud.google.com/go/metastore/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/metastore/apiv1alpha/dataproc_metastore_client.go b/metastore/apiv1alpha/dataproc_metastore_client.go
index c684c05..006ad2e 100644
--- a/metastore/apiv1alpha/dataproc_metastore_client.go
+++ b/metastore/apiv1alpha/dataproc_metastore_client.go
@@ -475,7 +475,7 @@
 // use by Google-written clients.
 func (c *dataprocMetastoreGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -487,6 +487,7 @@
 
 func (c *dataprocMetastoreGRPCClient) ListServices(ctx context.Context, req *metastorepb.ListServicesRequest, opts ...gax.CallOption) *ServiceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServices[0:len((*c.CallOptions).ListServices):len((*c.CallOptions).ListServices)], opts...)
 	it := &ServiceIterator{}
@@ -536,6 +537,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetService[0:len((*c.CallOptions).GetService):len((*c.CallOptions).GetService)], opts...)
 	var resp *metastorepb.Service
@@ -557,6 +559,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateService[0:len((*c.CallOptions).CreateService):len((*c.CallOptions).CreateService)], opts...)
 	var resp *longrunningpb.Operation
@@ -580,6 +583,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service.name", url.QueryEscape(req.GetService().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateService[0:len((*c.CallOptions).UpdateService):len((*c.CallOptions).UpdateService)], opts...)
 	var resp *longrunningpb.Operation
@@ -603,6 +607,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteService[0:len((*c.CallOptions).DeleteService):len((*c.CallOptions).DeleteService)], opts...)
 	var resp *longrunningpb.Operation
@@ -621,6 +626,7 @@
 
 func (c *dataprocMetastoreGRPCClient) ListMetadataImports(ctx context.Context, req *metastorepb.ListMetadataImportsRequest, opts ...gax.CallOption) *MetadataImportIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMetadataImports[0:len((*c.CallOptions).ListMetadataImports):len((*c.CallOptions).ListMetadataImports)], opts...)
 	it := &MetadataImportIterator{}
@@ -670,6 +676,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMetadataImport[0:len((*c.CallOptions).GetMetadataImport):len((*c.CallOptions).GetMetadataImport)], opts...)
 	var resp *metastorepb.MetadataImport
@@ -691,6 +698,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMetadataImport[0:len((*c.CallOptions).CreateMetadataImport):len((*c.CallOptions).CreateMetadataImport)], opts...)
 	var resp *longrunningpb.Operation
@@ -714,6 +722,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "metadata_import.name", url.QueryEscape(req.GetMetadataImport().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateMetadataImport[0:len((*c.CallOptions).UpdateMetadataImport):len((*c.CallOptions).UpdateMetadataImport)], opts...)
 	var resp *longrunningpb.Operation
@@ -737,6 +746,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service", url.QueryEscape(req.GetService())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportMetadata[0:len((*c.CallOptions).ExportMetadata):len((*c.CallOptions).ExportMetadata)], opts...)
 	var resp *longrunningpb.Operation
@@ -760,6 +770,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service", url.QueryEscape(req.GetService())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RestoreService[0:len((*c.CallOptions).RestoreService):len((*c.CallOptions).RestoreService)], opts...)
 	var resp *longrunningpb.Operation
@@ -778,6 +789,7 @@
 
 func (c *dataprocMetastoreGRPCClient) ListBackups(ctx context.Context, req *metastorepb.ListBackupsRequest, opts ...gax.CallOption) *BackupIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBackups[0:len((*c.CallOptions).ListBackups):len((*c.CallOptions).ListBackups)], opts...)
 	it := &BackupIterator{}
@@ -827,6 +839,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBackup[0:len((*c.CallOptions).GetBackup):len((*c.CallOptions).GetBackup)], opts...)
 	var resp *metastorepb.Backup
@@ -848,6 +861,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBackup[0:len((*c.CallOptions).CreateBackup):len((*c.CallOptions).CreateBackup)], opts...)
 	var resp *longrunningpb.Operation
@@ -871,6 +885,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteBackup[0:len((*c.CallOptions).DeleteBackup):len((*c.CallOptions).DeleteBackup)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/metastore/apiv1alpha/doc.go b/metastore/apiv1alpha/doc.go
index fd5ed23..7ed0c22 100644
--- a/metastore/apiv1alpha/doc.go
+++ b/metastore/apiv1alpha/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/metastore/apiv1alpha/version.go b/metastore/apiv1alpha/version.go
new file mode 100644
index 0000000..ebf5ad8
--- /dev/null
+++ b/metastore/apiv1alpha/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package metastore
+
+import "cloud.google.com/go/metastore/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/metastore/apiv1beta/dataproc_metastore_client.go b/metastore/apiv1beta/dataproc_metastore_client.go
index 59b2a3b..37f483e 100644
--- a/metastore/apiv1beta/dataproc_metastore_client.go
+++ b/metastore/apiv1beta/dataproc_metastore_client.go
@@ -475,7 +475,7 @@
 // use by Google-written clients.
 func (c *dataprocMetastoreGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -487,6 +487,7 @@
 
 func (c *dataprocMetastoreGRPCClient) ListServices(ctx context.Context, req *metastorepb.ListServicesRequest, opts ...gax.CallOption) *ServiceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServices[0:len((*c.CallOptions).ListServices):len((*c.CallOptions).ListServices)], opts...)
 	it := &ServiceIterator{}
@@ -536,6 +537,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetService[0:len((*c.CallOptions).GetService):len((*c.CallOptions).GetService)], opts...)
 	var resp *metastorepb.Service
@@ -557,6 +559,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateService[0:len((*c.CallOptions).CreateService):len((*c.CallOptions).CreateService)], opts...)
 	var resp *longrunningpb.Operation
@@ -580,6 +583,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service.name", url.QueryEscape(req.GetService().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateService[0:len((*c.CallOptions).UpdateService):len((*c.CallOptions).UpdateService)], opts...)
 	var resp *longrunningpb.Operation
@@ -603,6 +607,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteService[0:len((*c.CallOptions).DeleteService):len((*c.CallOptions).DeleteService)], opts...)
 	var resp *longrunningpb.Operation
@@ -621,6 +626,7 @@
 
 func (c *dataprocMetastoreGRPCClient) ListMetadataImports(ctx context.Context, req *metastorepb.ListMetadataImportsRequest, opts ...gax.CallOption) *MetadataImportIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMetadataImports[0:len((*c.CallOptions).ListMetadataImports):len((*c.CallOptions).ListMetadataImports)], opts...)
 	it := &MetadataImportIterator{}
@@ -670,6 +676,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMetadataImport[0:len((*c.CallOptions).GetMetadataImport):len((*c.CallOptions).GetMetadataImport)], opts...)
 	var resp *metastorepb.MetadataImport
@@ -691,6 +698,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMetadataImport[0:len((*c.CallOptions).CreateMetadataImport):len((*c.CallOptions).CreateMetadataImport)], opts...)
 	var resp *longrunningpb.Operation
@@ -714,6 +722,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "metadata_import.name", url.QueryEscape(req.GetMetadataImport().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateMetadataImport[0:len((*c.CallOptions).UpdateMetadataImport):len((*c.CallOptions).UpdateMetadataImport)], opts...)
 	var resp *longrunningpb.Operation
@@ -737,6 +746,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service", url.QueryEscape(req.GetService())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportMetadata[0:len((*c.CallOptions).ExportMetadata):len((*c.CallOptions).ExportMetadata)], opts...)
 	var resp *longrunningpb.Operation
@@ -760,6 +770,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service", url.QueryEscape(req.GetService())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RestoreService[0:len((*c.CallOptions).RestoreService):len((*c.CallOptions).RestoreService)], opts...)
 	var resp *longrunningpb.Operation
@@ -778,6 +789,7 @@
 
 func (c *dataprocMetastoreGRPCClient) ListBackups(ctx context.Context, req *metastorepb.ListBackupsRequest, opts ...gax.CallOption) *BackupIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBackups[0:len((*c.CallOptions).ListBackups):len((*c.CallOptions).ListBackups)], opts...)
 	it := &BackupIterator{}
@@ -827,6 +839,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBackup[0:len((*c.CallOptions).GetBackup):len((*c.CallOptions).GetBackup)], opts...)
 	var resp *metastorepb.Backup
@@ -848,6 +861,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBackup[0:len((*c.CallOptions).CreateBackup):len((*c.CallOptions).CreateBackup)], opts...)
 	var resp *longrunningpb.Operation
@@ -871,6 +885,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteBackup[0:len((*c.CallOptions).DeleteBackup):len((*c.CallOptions).DeleteBackup)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/metastore/apiv1beta/doc.go b/metastore/apiv1beta/doc.go
index 27c91d2..57740a9 100644
--- a/metastore/apiv1beta/doc.go
+++ b/metastore/apiv1beta/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/metastore/apiv1beta/version.go b/metastore/apiv1beta/version.go
new file mode 100644
index 0000000..ebf5ad8
--- /dev/null
+++ b/metastore/apiv1beta/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package metastore
+
+import "cloud.google.com/go/metastore/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/monitoring/apiv3/v2/alert_policy_client.go b/monitoring/apiv3/v2/alert_policy_client.go
index 20b866a..813b9de 100644
--- a/monitoring/apiv3/v2/alert_policy_client.go
+++ b/monitoring/apiv3/v2/alert_policy_client.go
@@ -258,7 +258,7 @@
 // use by Google-written clients.
 func (c *alertPolicyGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -270,6 +270,7 @@
 
 func (c *alertPolicyGRPCClient) ListAlertPolicies(ctx context.Context, req *monitoringpb.ListAlertPoliciesRequest, opts ...gax.CallOption) *AlertPolicyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAlertPolicies[0:len((*c.CallOptions).ListAlertPolicies):len((*c.CallOptions).ListAlertPolicies)], opts...)
 	it := &AlertPolicyIterator{}
@@ -319,6 +320,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAlertPolicy[0:len((*c.CallOptions).GetAlertPolicy):len((*c.CallOptions).GetAlertPolicy)], opts...)
 	var resp *monitoringpb.AlertPolicy
@@ -340,6 +342,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAlertPolicy[0:len((*c.CallOptions).CreateAlertPolicy):len((*c.CallOptions).CreateAlertPolicy)], opts...)
 	var resp *monitoringpb.AlertPolicy
@@ -361,6 +364,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAlertPolicy[0:len((*c.CallOptions).DeleteAlertPolicy):len((*c.CallOptions).DeleteAlertPolicy)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -378,6 +382,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "alert_policy.name", url.QueryEscape(req.GetAlertPolicy().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAlertPolicy[0:len((*c.CallOptions).UpdateAlertPolicy):len((*c.CallOptions).UpdateAlertPolicy)], opts...)
 	var resp *monitoringpb.AlertPolicy
diff --git a/monitoring/apiv3/v2/doc.go b/monitoring/apiv3/v2/doc.go
index c5e28b6..8844a49 100644
--- a/monitoring/apiv3/v2/doc.go
+++ b/monitoring/apiv3/v2/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/monitoring/apiv3/v2/group_client.go b/monitoring/apiv3/v2/group_client.go
index 9e4ddaa..d2a94a7 100644
--- a/monitoring/apiv3/v2/group_client.go
+++ b/monitoring/apiv3/v2/group_client.go
@@ -291,7 +291,7 @@
 // use by Google-written clients.
 func (c *groupGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -303,6 +303,7 @@
 
 func (c *groupGRPCClient) ListGroups(ctx context.Context, req *monitoringpb.ListGroupsRequest, opts ...gax.CallOption) *GroupIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGroups[0:len((*c.CallOptions).ListGroups):len((*c.CallOptions).ListGroups)], opts...)
 	it := &GroupIterator{}
@@ -352,6 +353,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGroup[0:len((*c.CallOptions).GetGroup):len((*c.CallOptions).GetGroup)], opts...)
 	var resp *monitoringpb.Group
@@ -373,6 +375,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGroup[0:len((*c.CallOptions).CreateGroup):len((*c.CallOptions).CreateGroup)], opts...)
 	var resp *monitoringpb.Group
@@ -394,6 +397,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "group.name", url.QueryEscape(req.GetGroup().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGroup[0:len((*c.CallOptions).UpdateGroup):len((*c.CallOptions).UpdateGroup)], opts...)
 	var resp *monitoringpb.Group
@@ -415,6 +419,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGroup[0:len((*c.CallOptions).DeleteGroup):len((*c.CallOptions).DeleteGroup)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -427,6 +432,7 @@
 
 func (c *groupGRPCClient) ListGroupMembers(ctx context.Context, req *monitoringpb.ListGroupMembersRequest, opts ...gax.CallOption) *MonitoredResourceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGroupMembers[0:len((*c.CallOptions).ListGroupMembers):len((*c.CallOptions).ListGroupMembers)], opts...)
 	it := &MonitoredResourceIterator{}
diff --git a/monitoring/apiv3/v2/metric_client.go b/monitoring/apiv3/v2/metric_client.go
index 515356f..49e1a69 100644
--- a/monitoring/apiv3/v2/metric_client.go
+++ b/monitoring/apiv3/v2/metric_client.go
@@ -322,7 +322,7 @@
 // use by Google-written clients.
 func (c *metricGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -334,6 +334,7 @@
 
 func (c *metricGRPCClient) ListMonitoredResourceDescriptors(ctx context.Context, req *monitoringpb.ListMonitoredResourceDescriptorsRequest, opts ...gax.CallOption) *MonitoredResourceDescriptorIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMonitoredResourceDescriptors[0:len((*c.CallOptions).ListMonitoredResourceDescriptors):len((*c.CallOptions).ListMonitoredResourceDescriptors)], opts...)
 	it := &MonitoredResourceDescriptorIterator{}
@@ -383,6 +384,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMonitoredResourceDescriptor[0:len((*c.CallOptions).GetMonitoredResourceDescriptor):len((*c.CallOptions).GetMonitoredResourceDescriptor)], opts...)
 	var resp *monitoredrespb.MonitoredResourceDescriptor
@@ -399,6 +401,7 @@
 
 func (c *metricGRPCClient) ListMetricDescriptors(ctx context.Context, req *monitoringpb.ListMetricDescriptorsRequest, opts ...gax.CallOption) *MetricDescriptorIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMetricDescriptors[0:len((*c.CallOptions).ListMetricDescriptors):len((*c.CallOptions).ListMetricDescriptors)], opts...)
 	it := &MetricDescriptorIterator{}
@@ -448,6 +451,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMetricDescriptor[0:len((*c.CallOptions).GetMetricDescriptor):len((*c.CallOptions).GetMetricDescriptor)], opts...)
 	var resp *metricpb.MetricDescriptor
@@ -469,6 +473,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMetricDescriptor[0:len((*c.CallOptions).CreateMetricDescriptor):len((*c.CallOptions).CreateMetricDescriptor)], opts...)
 	var resp *metricpb.MetricDescriptor
@@ -490,6 +495,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteMetricDescriptor[0:len((*c.CallOptions).DeleteMetricDescriptor):len((*c.CallOptions).DeleteMetricDescriptor)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -502,6 +508,7 @@
 
 func (c *metricGRPCClient) ListTimeSeries(ctx context.Context, req *monitoringpb.ListTimeSeriesRequest, opts ...gax.CallOption) *TimeSeriesIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTimeSeries[0:len((*c.CallOptions).ListTimeSeries):len((*c.CallOptions).ListTimeSeries)], opts...)
 	it := &TimeSeriesIterator{}
@@ -551,6 +558,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTimeSeries[0:len((*c.CallOptions).CreateTimeSeries):len((*c.CallOptions).CreateTimeSeries)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -563,6 +571,7 @@
 
 func (c *metricGRPCClient) CreateServiceTimeSeries(ctx context.Context, req *monitoringpb.CreateTimeSeriesRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateServiceTimeSeries[0:len((*c.CallOptions).CreateServiceTimeSeries):len((*c.CallOptions).CreateServiceTimeSeries)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/monitoring/apiv3/v2/notification_channel_client.go b/monitoring/apiv3/v2/notification_channel_client.go
index b0ae004..d732aff 100644
--- a/monitoring/apiv3/v2/notification_channel_client.go
+++ b/monitoring/apiv3/v2/notification_channel_client.go
@@ -352,7 +352,7 @@
 // use by Google-written clients.
 func (c *notificationChannelGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -364,6 +364,7 @@
 
 func (c *notificationChannelGRPCClient) ListNotificationChannelDescriptors(ctx context.Context, req *monitoringpb.ListNotificationChannelDescriptorsRequest, opts ...gax.CallOption) *NotificationChannelDescriptorIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListNotificationChannelDescriptors[0:len((*c.CallOptions).ListNotificationChannelDescriptors):len((*c.CallOptions).ListNotificationChannelDescriptors)], opts...)
 	it := &NotificationChannelDescriptorIterator{}
@@ -413,6 +414,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetNotificationChannelDescriptor[0:len((*c.CallOptions).GetNotificationChannelDescriptor):len((*c.CallOptions).GetNotificationChannelDescriptor)], opts...)
 	var resp *monitoringpb.NotificationChannelDescriptor
@@ -429,6 +431,7 @@
 
 func (c *notificationChannelGRPCClient) ListNotificationChannels(ctx context.Context, req *monitoringpb.ListNotificationChannelsRequest, opts ...gax.CallOption) *NotificationChannelIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListNotificationChannels[0:len((*c.CallOptions).ListNotificationChannels):len((*c.CallOptions).ListNotificationChannels)], opts...)
 	it := &NotificationChannelIterator{}
@@ -478,6 +481,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetNotificationChannel[0:len((*c.CallOptions).GetNotificationChannel):len((*c.CallOptions).GetNotificationChannel)], opts...)
 	var resp *monitoringpb.NotificationChannel
@@ -499,6 +503,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateNotificationChannel[0:len((*c.CallOptions).CreateNotificationChannel):len((*c.CallOptions).CreateNotificationChannel)], opts...)
 	var resp *monitoringpb.NotificationChannel
@@ -520,6 +525,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "notification_channel.name", url.QueryEscape(req.GetNotificationChannel().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateNotificationChannel[0:len((*c.CallOptions).UpdateNotificationChannel):len((*c.CallOptions).UpdateNotificationChannel)], opts...)
 	var resp *monitoringpb.NotificationChannel
@@ -541,6 +547,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteNotificationChannel[0:len((*c.CallOptions).DeleteNotificationChannel):len((*c.CallOptions).DeleteNotificationChannel)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -558,6 +565,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SendNotificationChannelVerificationCode[0:len((*c.CallOptions).SendNotificationChannelVerificationCode):len((*c.CallOptions).SendNotificationChannelVerificationCode)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -575,6 +583,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetNotificationChannelVerificationCode[0:len((*c.CallOptions).GetNotificationChannelVerificationCode):len((*c.CallOptions).GetNotificationChannelVerificationCode)], opts...)
 	var resp *monitoringpb.GetNotificationChannelVerificationCodeResponse
@@ -596,6 +605,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).VerifyNotificationChannel[0:len((*c.CallOptions).VerifyNotificationChannel):len((*c.CallOptions).VerifyNotificationChannel)], opts...)
 	var resp *monitoringpb.NotificationChannel
diff --git a/monitoring/apiv3/v2/query_client.go b/monitoring/apiv3/v2/query_client.go
index e112b09..e2e2b91 100644
--- a/monitoring/apiv3/v2/query_client.go
+++ b/monitoring/apiv3/v2/query_client.go
@@ -179,7 +179,7 @@
 // use by Google-written clients.
 func (c *queryGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -191,6 +191,7 @@
 
 func (c *queryGRPCClient) QueryTimeSeries(ctx context.Context, req *monitoringpb.QueryTimeSeriesRequest, opts ...gax.CallOption) *TimeSeriesDataIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).QueryTimeSeries[0:len((*c.CallOptions).QueryTimeSeries):len((*c.CallOptions).QueryTimeSeries)], opts...)
 	it := &TimeSeriesDataIterator{}
diff --git a/monitoring/apiv3/v2/service_monitoring_client.go b/monitoring/apiv3/v2/service_monitoring_client.go
index c083e5e..693f4b6 100644
--- a/monitoring/apiv3/v2/service_monitoring_client.go
+++ b/monitoring/apiv3/v2/service_monitoring_client.go
@@ -315,7 +315,7 @@
 // use by Google-written clients.
 func (c *serviceMonitoringGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -332,6 +332,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateService[0:len((*c.CallOptions).CreateService):len((*c.CallOptions).CreateService)], opts...)
 	var resp *monitoringpb.Service
@@ -353,6 +354,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetService[0:len((*c.CallOptions).GetService):len((*c.CallOptions).GetService)], opts...)
 	var resp *monitoringpb.Service
@@ -369,6 +371,7 @@
 
 func (c *serviceMonitoringGRPCClient) ListServices(ctx context.Context, req *monitoringpb.ListServicesRequest, opts ...gax.CallOption) *ServiceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServices[0:len((*c.CallOptions).ListServices):len((*c.CallOptions).ListServices)], opts...)
 	it := &ServiceIterator{}
@@ -418,6 +421,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service.name", url.QueryEscape(req.GetService().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateService[0:len((*c.CallOptions).UpdateService):len((*c.CallOptions).UpdateService)], opts...)
 	var resp *monitoringpb.Service
@@ -439,6 +443,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteService[0:len((*c.CallOptions).DeleteService):len((*c.CallOptions).DeleteService)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -456,6 +461,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateServiceLevelObjective[0:len((*c.CallOptions).CreateServiceLevelObjective):len((*c.CallOptions).CreateServiceLevelObjective)], opts...)
 	var resp *monitoringpb.ServiceLevelObjective
@@ -477,6 +483,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetServiceLevelObjective[0:len((*c.CallOptions).GetServiceLevelObjective):len((*c.CallOptions).GetServiceLevelObjective)], opts...)
 	var resp *monitoringpb.ServiceLevelObjective
@@ -493,6 +500,7 @@
 
 func (c *serviceMonitoringGRPCClient) ListServiceLevelObjectives(ctx context.Context, req *monitoringpb.ListServiceLevelObjectivesRequest, opts ...gax.CallOption) *ServiceLevelObjectiveIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServiceLevelObjectives[0:len((*c.CallOptions).ListServiceLevelObjectives):len((*c.CallOptions).ListServiceLevelObjectives)], opts...)
 	it := &ServiceLevelObjectiveIterator{}
@@ -542,6 +550,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_level_objective.name", url.QueryEscape(req.GetServiceLevelObjective().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateServiceLevelObjective[0:len((*c.CallOptions).UpdateServiceLevelObjective):len((*c.CallOptions).UpdateServiceLevelObjective)], opts...)
 	var resp *monitoringpb.ServiceLevelObjective
@@ -563,6 +572,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteServiceLevelObjective[0:len((*c.CallOptions).DeleteServiceLevelObjective):len((*c.CallOptions).DeleteServiceLevelObjective)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/monitoring/apiv3/v2/uptime_check_client.go b/monitoring/apiv3/v2/uptime_check_client.go
index 27a80b0..9203c54 100644
--- a/monitoring/apiv3/v2/uptime_check_client.go
+++ b/monitoring/apiv3/v2/uptime_check_client.go
@@ -277,7 +277,7 @@
 // use by Google-written clients.
 func (c *uptimeCheckGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -289,6 +289,7 @@
 
 func (c *uptimeCheckGRPCClient) ListUptimeCheckConfigs(ctx context.Context, req *monitoringpb.ListUptimeCheckConfigsRequest, opts ...gax.CallOption) *UptimeCheckConfigIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListUptimeCheckConfigs[0:len((*c.CallOptions).ListUptimeCheckConfigs):len((*c.CallOptions).ListUptimeCheckConfigs)], opts...)
 	it := &UptimeCheckConfigIterator{}
@@ -338,6 +339,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetUptimeCheckConfig[0:len((*c.CallOptions).GetUptimeCheckConfig):len((*c.CallOptions).GetUptimeCheckConfig)], opts...)
 	var resp *monitoringpb.UptimeCheckConfig
@@ -359,6 +361,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateUptimeCheckConfig[0:len((*c.CallOptions).CreateUptimeCheckConfig):len((*c.CallOptions).CreateUptimeCheckConfig)], opts...)
 	var resp *monitoringpb.UptimeCheckConfig
@@ -380,6 +383,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "uptime_check_config.name", url.QueryEscape(req.GetUptimeCheckConfig().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateUptimeCheckConfig[0:len((*c.CallOptions).UpdateUptimeCheckConfig):len((*c.CallOptions).UpdateUptimeCheckConfig)], opts...)
 	var resp *monitoringpb.UptimeCheckConfig
@@ -401,6 +405,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteUptimeCheckConfig[0:len((*c.CallOptions).DeleteUptimeCheckConfig):len((*c.CallOptions).DeleteUptimeCheckConfig)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/monitoring/apiv3/v2/version.go b/monitoring/apiv3/v2/version.go
new file mode 100644
index 0000000..bb4981e
--- /dev/null
+++ b/monitoring/apiv3/v2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package monitoring
+
+import "cloud.google.com/go/monitoring/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/monitoring/dashboard/apiv1/dashboards_client.go b/monitoring/dashboard/apiv1/dashboards_client.go
index 1e2d93e..a69e01e 100644
--- a/monitoring/dashboard/apiv1/dashboards_client.go
+++ b/monitoring/dashboard/apiv1/dashboards_client.go
@@ -250,7 +250,7 @@
 // use by Google-written clients.
 func (c *dashboardsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -267,6 +267,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDashboard[0:len((*c.CallOptions).CreateDashboard):len((*c.CallOptions).CreateDashboard)], opts...)
 	var resp *dashboardpb.Dashboard
@@ -283,6 +284,7 @@
 
 func (c *dashboardsGRPCClient) ListDashboards(ctx context.Context, req *dashboardpb.ListDashboardsRequest, opts ...gax.CallOption) *DashboardIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDashboards[0:len((*c.CallOptions).ListDashboards):len((*c.CallOptions).ListDashboards)], opts...)
 	it := &DashboardIterator{}
@@ -332,6 +334,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDashboard[0:len((*c.CallOptions).GetDashboard):len((*c.CallOptions).GetDashboard)], opts...)
 	var resp *dashboardpb.Dashboard
@@ -353,6 +356,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDashboard[0:len((*c.CallOptions).DeleteDashboard):len((*c.CallOptions).DeleteDashboard)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -370,6 +374,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "dashboard.name", url.QueryEscape(req.GetDashboard().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDashboard[0:len((*c.CallOptions).UpdateDashboard):len((*c.CallOptions).UpdateDashboard)], opts...)
 	var resp *dashboardpb.Dashboard
diff --git a/monitoring/dashboard/apiv1/doc.go b/monitoring/dashboard/apiv1/doc.go
index 223e8a6..4cbe9d9 100644
--- a/monitoring/dashboard/apiv1/doc.go
+++ b/monitoring/dashboard/apiv1/doc.go
@@ -89,7 +89,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/monitoring/dashboard/apiv1/version.go b/monitoring/dashboard/apiv1/version.go
new file mode 100644
index 0000000..416defa
--- /dev/null
+++ b/monitoring/dashboard/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package dashboard
+
+import "cloud.google.com/go/monitoring/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/monitoring/metricsscope/apiv1/doc.go b/monitoring/metricsscope/apiv1/doc.go
index 6633755..68b6e09 100644
--- a/monitoring/metricsscope/apiv1/doc.go
+++ b/monitoring/metricsscope/apiv1/doc.go
@@ -89,7 +89,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/monitoring/metricsscope/apiv1/metrics_scopes_client.go b/monitoring/metricsscope/apiv1/metrics_scopes_client.go
index 06e8fd0..1548f6f 100644
--- a/monitoring/metricsscope/apiv1/metrics_scopes_client.go
+++ b/monitoring/metricsscope/apiv1/metrics_scopes_client.go
@@ -241,7 +241,7 @@
 // use by Google-written clients.
 func (c *metricsScopesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -253,6 +253,7 @@
 
 func (c *metricsScopesGRPCClient) GetMetricsScope(ctx context.Context, req *metricsscopepb.GetMetricsScopeRequest, opts ...gax.CallOption) (*metricsscopepb.MetricsScope, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMetricsScope[0:len((*c.CallOptions).GetMetricsScope):len((*c.CallOptions).GetMetricsScope)], opts...)
 	var resp *metricsscopepb.MetricsScope
@@ -284,6 +285,7 @@
 
 func (c *metricsScopesGRPCClient) CreateMonitoredProject(ctx context.Context, req *metricsscopepb.CreateMonitoredProjectRequest, opts ...gax.CallOption) (*CreateMonitoredProjectOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMonitoredProject[0:len((*c.CallOptions).CreateMonitoredProject):len((*c.CallOptions).CreateMonitoredProject)], opts...)
 	var resp *longrunningpb.Operation
@@ -302,6 +304,7 @@
 
 func (c *metricsScopesGRPCClient) DeleteMonitoredProject(ctx context.Context, req *metricsscopepb.DeleteMonitoredProjectRequest, opts ...gax.CallOption) (*DeleteMonitoredProjectOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteMonitoredProject[0:len((*c.CallOptions).DeleteMonitoredProject):len((*c.CallOptions).DeleteMonitoredProject)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/monitoring/metricsscope/apiv1/version.go b/monitoring/metricsscope/apiv1/version.go
new file mode 100644
index 0000000..eda416b
--- /dev/null
+++ b/monitoring/metricsscope/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package metricsscope
+
+import "cloud.google.com/go/monitoring/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/networkconnectivity/apiv1/doc.go b/networkconnectivity/apiv1/doc.go
index 5b1e0b0..7f8d9d0 100644
--- a/networkconnectivity/apiv1/doc.go
+++ b/networkconnectivity/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/networkconnectivity/apiv1/hub_client.go b/networkconnectivity/apiv1/hub_client.go
index 641ca16..e8c25f5 100644
--- a/networkconnectivity/apiv1/hub_client.go
+++ b/networkconnectivity/apiv1/hub_client.go
@@ -359,7 +359,7 @@
 // use by Google-written clients.
 func (c *hubGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -371,6 +371,7 @@
 
 func (c *hubGRPCClient) ListHubs(ctx context.Context, req *networkconnectivitypb.ListHubsRequest, opts ...gax.CallOption) *HubIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListHubs[0:len((*c.CallOptions).ListHubs):len((*c.CallOptions).ListHubs)], opts...)
 	it := &HubIterator{}
@@ -420,6 +421,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetHub[0:len((*c.CallOptions).GetHub):len((*c.CallOptions).GetHub)], opts...)
 	var resp *networkconnectivitypb.Hub
@@ -441,6 +443,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateHub[0:len((*c.CallOptions).CreateHub):len((*c.CallOptions).CreateHub)], opts...)
 	var resp *longrunningpb.Operation
@@ -464,6 +467,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "hub.name", url.QueryEscape(req.GetHub().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateHub[0:len((*c.CallOptions).UpdateHub):len((*c.CallOptions).UpdateHub)], opts...)
 	var resp *longrunningpb.Operation
@@ -487,6 +491,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteHub[0:len((*c.CallOptions).DeleteHub):len((*c.CallOptions).DeleteHub)], opts...)
 	var resp *longrunningpb.Operation
@@ -505,6 +510,7 @@
 
 func (c *hubGRPCClient) ListSpokes(ctx context.Context, req *networkconnectivitypb.ListSpokesRequest, opts ...gax.CallOption) *SpokeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSpokes[0:len((*c.CallOptions).ListSpokes):len((*c.CallOptions).ListSpokes)], opts...)
 	it := &SpokeIterator{}
@@ -554,6 +560,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSpoke[0:len((*c.CallOptions).GetSpoke):len((*c.CallOptions).GetSpoke)], opts...)
 	var resp *networkconnectivitypb.Spoke
@@ -575,6 +582,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSpoke[0:len((*c.CallOptions).CreateSpoke):len((*c.CallOptions).CreateSpoke)], opts...)
 	var resp *longrunningpb.Operation
@@ -598,6 +606,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "spoke.name", url.QueryEscape(req.GetSpoke().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSpoke[0:len((*c.CallOptions).UpdateSpoke):len((*c.CallOptions).UpdateSpoke)], opts...)
 	var resp *longrunningpb.Operation
@@ -621,6 +630,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSpoke[0:len((*c.CallOptions).DeleteSpoke):len((*c.CallOptions).DeleteSpoke)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/networkconnectivity/apiv1/version.go b/networkconnectivity/apiv1/version.go
new file mode 100644
index 0000000..e043aeb
--- /dev/null
+++ b/networkconnectivity/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package networkconnectivity
+
+import "cloud.google.com/go/networkconnectivity/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/networkconnectivity/apiv1alpha1/doc.go b/networkconnectivity/apiv1alpha1/doc.go
index a4efc52..2100e9d 100644
--- a/networkconnectivity/apiv1alpha1/doc.go
+++ b/networkconnectivity/apiv1alpha1/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/networkconnectivity/apiv1alpha1/hub_client.go b/networkconnectivity/apiv1alpha1/hub_client.go
index b0a8671..59bd981 100644
--- a/networkconnectivity/apiv1alpha1/hub_client.go
+++ b/networkconnectivity/apiv1alpha1/hub_client.go
@@ -361,7 +361,7 @@
 // use by Google-written clients.
 func (c *hubGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -373,6 +373,7 @@
 
 func (c *hubGRPCClient) ListHubs(ctx context.Context, req *networkconnectivitypb.ListHubsRequest, opts ...gax.CallOption) *HubIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListHubs[0:len((*c.CallOptions).ListHubs):len((*c.CallOptions).ListHubs)], opts...)
 	it := &HubIterator{}
@@ -422,6 +423,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetHub[0:len((*c.CallOptions).GetHub):len((*c.CallOptions).GetHub)], opts...)
 	var resp *networkconnectivitypb.Hub
@@ -443,6 +445,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateHub[0:len((*c.CallOptions).CreateHub):len((*c.CallOptions).CreateHub)], opts...)
 	var resp *longrunningpb.Operation
@@ -466,6 +469,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "hub.name", url.QueryEscape(req.GetHub().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateHub[0:len((*c.CallOptions).UpdateHub):len((*c.CallOptions).UpdateHub)], opts...)
 	var resp *longrunningpb.Operation
@@ -489,6 +493,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteHub[0:len((*c.CallOptions).DeleteHub):len((*c.CallOptions).DeleteHub)], opts...)
 	var resp *longrunningpb.Operation
@@ -507,6 +512,7 @@
 
 func (c *hubGRPCClient) ListSpokes(ctx context.Context, req *networkconnectivitypb.ListSpokesRequest, opts ...gax.CallOption) *SpokeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSpokes[0:len((*c.CallOptions).ListSpokes):len((*c.CallOptions).ListSpokes)], opts...)
 	it := &SpokeIterator{}
@@ -556,6 +562,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSpoke[0:len((*c.CallOptions).GetSpoke):len((*c.CallOptions).GetSpoke)], opts...)
 	var resp *networkconnectivitypb.Spoke
@@ -577,6 +584,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSpoke[0:len((*c.CallOptions).CreateSpoke):len((*c.CallOptions).CreateSpoke)], opts...)
 	var resp *longrunningpb.Operation
@@ -600,6 +608,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "spoke.name", url.QueryEscape(req.GetSpoke().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSpoke[0:len((*c.CallOptions).UpdateSpoke):len((*c.CallOptions).UpdateSpoke)], opts...)
 	var resp *longrunningpb.Operation
@@ -623,6 +632,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSpoke[0:len((*c.CallOptions).DeleteSpoke):len((*c.CallOptions).DeleteSpoke)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/networkconnectivity/apiv1alpha1/version.go b/networkconnectivity/apiv1alpha1/version.go
new file mode 100644
index 0000000..e043aeb
--- /dev/null
+++ b/networkconnectivity/apiv1alpha1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package networkconnectivity
+
+import "cloud.google.com/go/networkconnectivity/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/networkmanagement/apiv1/doc.go b/networkmanagement/apiv1/doc.go
index eee692d..33c8b34 100644
--- a/networkmanagement/apiv1/doc.go
+++ b/networkmanagement/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/networkmanagement/apiv1/reachability_client.go b/networkmanagement/apiv1/reachability_client.go
index d80cf32..6501ea3 100644
--- a/networkmanagement/apiv1/reachability_client.go
+++ b/networkmanagement/apiv1/reachability_client.go
@@ -318,7 +318,7 @@
 // use by Google-written clients.
 func (c *reachabilityGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -330,6 +330,7 @@
 
 func (c *reachabilityGRPCClient) ListConnectivityTests(ctx context.Context, req *networkmanagementpb.ListConnectivityTestsRequest, opts ...gax.CallOption) *ConnectivityTestIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListConnectivityTests[0:len((*c.CallOptions).ListConnectivityTests):len((*c.CallOptions).ListConnectivityTests)], opts...)
 	it := &ConnectivityTestIterator{}
@@ -379,6 +380,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetConnectivityTest[0:len((*c.CallOptions).GetConnectivityTest):len((*c.CallOptions).GetConnectivityTest)], opts...)
 	var resp *networkmanagementpb.ConnectivityTest
@@ -400,6 +402,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateConnectivityTest[0:len((*c.CallOptions).CreateConnectivityTest):len((*c.CallOptions).CreateConnectivityTest)], opts...)
 	var resp *longrunningpb.Operation
@@ -423,6 +426,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource.name", url.QueryEscape(req.GetResource().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateConnectivityTest[0:len((*c.CallOptions).UpdateConnectivityTest):len((*c.CallOptions).UpdateConnectivityTest)], opts...)
 	var resp *longrunningpb.Operation
@@ -446,6 +450,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RerunConnectivityTest[0:len((*c.CallOptions).RerunConnectivityTest):len((*c.CallOptions).RerunConnectivityTest)], opts...)
 	var resp *longrunningpb.Operation
@@ -469,6 +474,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteConnectivityTest[0:len((*c.CallOptions).DeleteConnectivityTest):len((*c.CallOptions).DeleteConnectivityTest)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/networkmanagement/apiv1/version.go b/networkmanagement/apiv1/version.go
new file mode 100644
index 0000000..f15c5d1
--- /dev/null
+++ b/networkmanagement/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package networkmanagement
+
+import "cloud.google.com/go/networkmanagement/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/networksecurity/apiv1beta1/doc.go b/networksecurity/apiv1beta1/doc.go
index 4eb0ae8..2bf7fa3 100644
--- a/networksecurity/apiv1beta1/doc.go
+++ b/networksecurity/apiv1beta1/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/networksecurity/apiv1beta1/network_security_client.go b/networksecurity/apiv1beta1/network_security_client.go
index b053ec3..cfe0d48 100644
--- a/networksecurity/apiv1beta1/network_security_client.go
+++ b/networksecurity/apiv1beta1/network_security_client.go
@@ -379,7 +379,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -391,6 +391,7 @@
 
 func (c *gRPCClient) ListAuthorizationPolicies(ctx context.Context, req *networksecuritypb.ListAuthorizationPoliciesRequest, opts ...gax.CallOption) *AuthorizationPolicyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAuthorizationPolicies[0:len((*c.CallOptions).ListAuthorizationPolicies):len((*c.CallOptions).ListAuthorizationPolicies)], opts...)
 	it := &AuthorizationPolicyIterator{}
@@ -440,6 +441,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAuthorizationPolicy[0:len((*c.CallOptions).GetAuthorizationPolicy):len((*c.CallOptions).GetAuthorizationPolicy)], opts...)
 	var resp *networksecuritypb.AuthorizationPolicy
@@ -461,6 +463,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAuthorizationPolicy[0:len((*c.CallOptions).CreateAuthorizationPolicy):len((*c.CallOptions).CreateAuthorizationPolicy)], opts...)
 	var resp *longrunningpb.Operation
@@ -484,6 +487,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "authorization_policy.name", url.QueryEscape(req.GetAuthorizationPolicy().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateAuthorizationPolicy[0:len((*c.CallOptions).UpdateAuthorizationPolicy):len((*c.CallOptions).UpdateAuthorizationPolicy)], opts...)
 	var resp *longrunningpb.Operation
@@ -507,6 +511,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteAuthorizationPolicy[0:len((*c.CallOptions).DeleteAuthorizationPolicy):len((*c.CallOptions).DeleteAuthorizationPolicy)], opts...)
 	var resp *longrunningpb.Operation
@@ -525,6 +530,7 @@
 
 func (c *gRPCClient) ListServerTlsPolicies(ctx context.Context, req *networksecuritypb.ListServerTlsPoliciesRequest, opts ...gax.CallOption) *ServerTlsPolicyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServerTlsPolicies[0:len((*c.CallOptions).ListServerTlsPolicies):len((*c.CallOptions).ListServerTlsPolicies)], opts...)
 	it := &ServerTlsPolicyIterator{}
@@ -574,6 +580,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetServerTlsPolicy[0:len((*c.CallOptions).GetServerTlsPolicy):len((*c.CallOptions).GetServerTlsPolicy)], opts...)
 	var resp *networksecuritypb.ServerTlsPolicy
@@ -595,6 +602,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateServerTlsPolicy[0:len((*c.CallOptions).CreateServerTlsPolicy):len((*c.CallOptions).CreateServerTlsPolicy)], opts...)
 	var resp *longrunningpb.Operation
@@ -618,6 +626,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "server_tls_policy.name", url.QueryEscape(req.GetServerTlsPolicy().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateServerTlsPolicy[0:len((*c.CallOptions).UpdateServerTlsPolicy):len((*c.CallOptions).UpdateServerTlsPolicy)], opts...)
 	var resp *longrunningpb.Operation
@@ -641,6 +650,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteServerTlsPolicy[0:len((*c.CallOptions).DeleteServerTlsPolicy):len((*c.CallOptions).DeleteServerTlsPolicy)], opts...)
 	var resp *longrunningpb.Operation
@@ -659,6 +669,7 @@
 
 func (c *gRPCClient) ListClientTlsPolicies(ctx context.Context, req *networksecuritypb.ListClientTlsPoliciesRequest, opts ...gax.CallOption) *ClientTlsPolicyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListClientTlsPolicies[0:len((*c.CallOptions).ListClientTlsPolicies):len((*c.CallOptions).ListClientTlsPolicies)], opts...)
 	it := &ClientTlsPolicyIterator{}
@@ -708,6 +719,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetClientTlsPolicy[0:len((*c.CallOptions).GetClientTlsPolicy):len((*c.CallOptions).GetClientTlsPolicy)], opts...)
 	var resp *networksecuritypb.ClientTlsPolicy
@@ -729,6 +741,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateClientTlsPolicy[0:len((*c.CallOptions).CreateClientTlsPolicy):len((*c.CallOptions).CreateClientTlsPolicy)], opts...)
 	var resp *longrunningpb.Operation
@@ -752,6 +765,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "client_tls_policy.name", url.QueryEscape(req.GetClientTlsPolicy().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateClientTlsPolicy[0:len((*c.CallOptions).UpdateClientTlsPolicy):len((*c.CallOptions).UpdateClientTlsPolicy)], opts...)
 	var resp *longrunningpb.Operation
@@ -775,6 +789,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteClientTlsPolicy[0:len((*c.CallOptions).DeleteClientTlsPolicy):len((*c.CallOptions).DeleteClientTlsPolicy)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/networksecurity/apiv1beta1/version.go b/networksecurity/apiv1beta1/version.go
new file mode 100644
index 0000000..40eddd4
--- /dev/null
+++ b/networksecurity/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package networksecurity
+
+import "cloud.google.com/go/networksecurity/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/notebooks/apiv1beta1/doc.go b/notebooks/apiv1beta1/doc.go
index a071ee7..867807a 100644
--- a/notebooks/apiv1beta1/doc.go
+++ b/notebooks/apiv1beta1/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/notebooks/apiv1beta1/notebook_client.go b/notebooks/apiv1beta1/notebook_client.go
index 0fb174b..96272da 100644
--- a/notebooks/apiv1beta1/notebook_client.go
+++ b/notebooks/apiv1beta1/notebook_client.go
@@ -449,7 +449,7 @@
 // use by Google-written clients.
 func (c *notebookGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -461,6 +461,7 @@
 
 func (c *notebookGRPCClient) ListInstances(ctx context.Context, req *notebookspb.ListInstancesRequest, opts ...gax.CallOption) *InstanceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInstances[0:len((*c.CallOptions).ListInstances):len((*c.CallOptions).ListInstances)], opts...)
 	it := &InstanceIterator{}
@@ -510,6 +511,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstance[0:len((*c.CallOptions).GetInstance):len((*c.CallOptions).GetInstance)], opts...)
 	var resp *notebookspb.Instance
@@ -531,6 +533,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateInstance[0:len((*c.CallOptions).CreateInstance):len((*c.CallOptions).CreateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -554,6 +557,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RegisterInstance[0:len((*c.CallOptions).RegisterInstance):len((*c.CallOptions).RegisterInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -577,6 +581,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetInstanceAccelerator[0:len((*c.CallOptions).SetInstanceAccelerator):len((*c.CallOptions).SetInstanceAccelerator)], opts...)
 	var resp *longrunningpb.Operation
@@ -600,6 +605,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetInstanceMachineType[0:len((*c.CallOptions).SetInstanceMachineType):len((*c.CallOptions).SetInstanceMachineType)], opts...)
 	var resp *longrunningpb.Operation
@@ -623,6 +629,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetInstanceLabels[0:len((*c.CallOptions).SetInstanceLabels):len((*c.CallOptions).SetInstanceLabels)], opts...)
 	var resp *longrunningpb.Operation
@@ -646,6 +653,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteInstance[0:len((*c.CallOptions).DeleteInstance):len((*c.CallOptions).DeleteInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -669,6 +677,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartInstance[0:len((*c.CallOptions).StartInstance):len((*c.CallOptions).StartInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -692,6 +701,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StopInstance[0:len((*c.CallOptions).StopInstance):len((*c.CallOptions).StopInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -715,6 +725,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResetInstance[0:len((*c.CallOptions).ResetInstance):len((*c.CallOptions).ResetInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -738,6 +749,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReportInstanceInfo[0:len((*c.CallOptions).ReportInstanceInfo):len((*c.CallOptions).ReportInstanceInfo)], opts...)
 	var resp *longrunningpb.Operation
@@ -761,6 +773,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "notebook_instance", url.QueryEscape(req.GetNotebookInstance())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).IsInstanceUpgradeable[0:len((*c.CallOptions).IsInstanceUpgradeable):len((*c.CallOptions).IsInstanceUpgradeable)], opts...)
 	var resp *notebookspb.IsInstanceUpgradeableResponse
@@ -782,6 +795,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpgradeInstance[0:len((*c.CallOptions).UpgradeInstance):len((*c.CallOptions).UpgradeInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -805,6 +819,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpgradeInstanceInternal[0:len((*c.CallOptions).UpgradeInstanceInternal):len((*c.CallOptions).UpgradeInstanceInternal)], opts...)
 	var resp *longrunningpb.Operation
@@ -823,6 +838,7 @@
 
 func (c *notebookGRPCClient) ListEnvironments(ctx context.Context, req *notebookspb.ListEnvironmentsRequest, opts ...gax.CallOption) *EnvironmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEnvironments[0:len((*c.CallOptions).ListEnvironments):len((*c.CallOptions).ListEnvironments)], opts...)
 	it := &EnvironmentIterator{}
@@ -872,6 +888,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEnvironment[0:len((*c.CallOptions).GetEnvironment):len((*c.CallOptions).GetEnvironment)], opts...)
 	var resp *notebookspb.Environment
@@ -893,6 +910,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEnvironment[0:len((*c.CallOptions).CreateEnvironment):len((*c.CallOptions).CreateEnvironment)], opts...)
 	var resp *longrunningpb.Operation
@@ -916,6 +934,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEnvironment[0:len((*c.CallOptions).DeleteEnvironment):len((*c.CallOptions).DeleteEnvironment)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/notebooks/apiv1beta1/version.go b/notebooks/apiv1beta1/version.go
new file mode 100644
index 0000000..3363e38
--- /dev/null
+++ b/notebooks/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package notebooks
+
+import "cloud.google.com/go/notebooks/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/orchestration/airflow/service/apiv1/doc.go b/orchestration/airflow/service/apiv1/doc.go
index 0da5540..ca0e846 100644
--- a/orchestration/airflow/service/apiv1/doc.go
+++ b/orchestration/airflow/service/apiv1/doc.go
@@ -89,7 +89,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/orchestration/airflow/service/apiv1/environments_client.go b/orchestration/airflow/service/apiv1/environments_client.go
index 88b154f..0904b75 100644
--- a/orchestration/airflow/service/apiv1/environments_client.go
+++ b/orchestration/airflow/service/apiv1/environments_client.go
@@ -253,7 +253,7 @@
 // use by Google-written clients.
 func (c *environmentsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -265,6 +265,7 @@
 
 func (c *environmentsGRPCClient) CreateEnvironment(ctx context.Context, req *servicepb.CreateEnvironmentRequest, opts ...gax.CallOption) (*CreateEnvironmentOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEnvironment[0:len((*c.CallOptions).CreateEnvironment):len((*c.CallOptions).CreateEnvironment)], opts...)
 	var resp *longrunningpb.Operation
@@ -283,6 +284,7 @@
 
 func (c *environmentsGRPCClient) GetEnvironment(ctx context.Context, req *servicepb.GetEnvironmentRequest, opts ...gax.CallOption) (*servicepb.Environment, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEnvironment[0:len((*c.CallOptions).GetEnvironment):len((*c.CallOptions).GetEnvironment)], opts...)
 	var resp *servicepb.Environment
@@ -299,6 +301,7 @@
 
 func (c *environmentsGRPCClient) ListEnvironments(ctx context.Context, req *servicepb.ListEnvironmentsRequest, opts ...gax.CallOption) *EnvironmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEnvironments[0:len((*c.CallOptions).ListEnvironments):len((*c.CallOptions).ListEnvironments)], opts...)
 	it := &EnvironmentIterator{}
@@ -343,6 +346,7 @@
 
 func (c *environmentsGRPCClient) UpdateEnvironment(ctx context.Context, req *servicepb.UpdateEnvironmentRequest, opts ...gax.CallOption) (*UpdateEnvironmentOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEnvironment[0:len((*c.CallOptions).UpdateEnvironment):len((*c.CallOptions).UpdateEnvironment)], opts...)
 	var resp *longrunningpb.Operation
@@ -361,6 +365,7 @@
 
 func (c *environmentsGRPCClient) DeleteEnvironment(ctx context.Context, req *servicepb.DeleteEnvironmentRequest, opts ...gax.CallOption) (*DeleteEnvironmentOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEnvironment[0:len((*c.CallOptions).DeleteEnvironment):len((*c.CallOptions).DeleteEnvironment)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/orchestration/airflow/service/apiv1/image_versions_client.go b/orchestration/airflow/service/apiv1/image_versions_client.go
index e2999ec..f462444 100644
--- a/orchestration/airflow/service/apiv1/image_versions_client.go
+++ b/orchestration/airflow/service/apiv1/image_versions_client.go
@@ -175,7 +175,7 @@
 // use by Google-written clients.
 func (c *imageVersionsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -187,6 +187,7 @@
 
 func (c *imageVersionsGRPCClient) ListImageVersions(ctx context.Context, req *servicepb.ListImageVersionsRequest, opts ...gax.CallOption) *ImageVersionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListImageVersions[0:len((*c.CallOptions).ListImageVersions):len((*c.CallOptions).ListImageVersions)], opts...)
 	it := &ImageVersionIterator{}
diff --git a/orchestration/airflow/service/apiv1/version.go b/orchestration/airflow/service/apiv1/version.go
new file mode 100644
index 0000000..3f9a691
--- /dev/null
+++ b/orchestration/airflow/service/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package service
+
+import "cloud.google.com/go/orchestration/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/orgpolicy/apiv2/doc.go b/orgpolicy/apiv2/doc.go
index efd3eb3..04aad94 100644
--- a/orgpolicy/apiv2/doc.go
+++ b/orgpolicy/apiv2/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/orgpolicy/apiv2/org_policy_client.go b/orgpolicy/apiv2/org_policy_client.go
index 90ab249..a59189e 100644
--- a/orgpolicy/apiv2/org_policy_client.go
+++ b/orgpolicy/apiv2/org_policy_client.go
@@ -365,7 +365,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -377,6 +377,7 @@
 
 func (c *gRPCClient) ListConstraints(ctx context.Context, req *orgpolicypb.ListConstraintsRequest, opts ...gax.CallOption) *ConstraintIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListConstraints[0:len((*c.CallOptions).ListConstraints):len((*c.CallOptions).ListConstraints)], opts...)
 	it := &ConstraintIterator{}
@@ -421,6 +422,7 @@
 
 func (c *gRPCClient) ListPolicies(ctx context.Context, req *orgpolicypb.ListPoliciesRequest, opts ...gax.CallOption) *PolicyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPolicies[0:len((*c.CallOptions).ListPolicies):len((*c.CallOptions).ListPolicies)], opts...)
 	it := &PolicyIterator{}
@@ -470,6 +472,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPolicy[0:len((*c.CallOptions).GetPolicy):len((*c.CallOptions).GetPolicy)], opts...)
 	var resp *orgpolicypb.Policy
@@ -491,6 +494,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEffectivePolicy[0:len((*c.CallOptions).GetEffectivePolicy):len((*c.CallOptions).GetEffectivePolicy)], opts...)
 	var resp *orgpolicypb.Policy
@@ -512,6 +516,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreatePolicy[0:len((*c.CallOptions).CreatePolicy):len((*c.CallOptions).CreatePolicy)], opts...)
 	var resp *orgpolicypb.Policy
@@ -533,6 +538,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "policy.name", url.QueryEscape(req.GetPolicy().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdatePolicy[0:len((*c.CallOptions).UpdatePolicy):len((*c.CallOptions).UpdatePolicy)], opts...)
 	var resp *orgpolicypb.Policy
@@ -554,6 +560,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePolicy[0:len((*c.CallOptions).DeletePolicy):len((*c.CallOptions).DeletePolicy)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/orgpolicy/apiv2/version.go b/orgpolicy/apiv2/version.go
new file mode 100644
index 0000000..8c35d4e
--- /dev/null
+++ b/orgpolicy/apiv2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package orgpolicy
+
+import "cloud.google.com/go/orgpolicy/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/osconfig/agentendpoint/apiv1/agent_endpoint_client.go b/osconfig/agentendpoint/apiv1/agent_endpoint_client.go
index c4f9207..98e8fcb 100644
--- a/osconfig/agentendpoint/apiv1/agent_endpoint_client.go
+++ b/osconfig/agentendpoint/apiv1/agent_endpoint_client.go
@@ -278,7 +278,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/osconfig/agentendpoint/apiv1/doc.go b/osconfig/agentendpoint/apiv1/doc.go
index c9bea00..2c14070 100644
--- a/osconfig/agentendpoint/apiv1/doc.go
+++ b/osconfig/agentendpoint/apiv1/doc.go
@@ -67,7 +67,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/osconfig/agentendpoint/apiv1/version.go b/osconfig/agentendpoint/apiv1/version.go
new file mode 100644
index 0000000..219efc2
--- /dev/null
+++ b/osconfig/agentendpoint/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package agentendpoint
+
+import "cloud.google.com/go/osconfig/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/osconfig/agentendpoint/apiv1beta/agent_endpoint_client.go b/osconfig/agentendpoint/apiv1beta/agent_endpoint_client.go
index 966b0b5..01a468a 100644
--- a/osconfig/agentendpoint/apiv1beta/agent_endpoint_client.go
+++ b/osconfig/agentendpoint/apiv1beta/agent_endpoint_client.go
@@ -279,7 +279,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/osconfig/agentendpoint/apiv1beta/doc.go b/osconfig/agentendpoint/apiv1beta/doc.go
index c55781f..b710dc3 100644
--- a/osconfig/agentendpoint/apiv1beta/doc.go
+++ b/osconfig/agentendpoint/apiv1beta/doc.go
@@ -69,7 +69,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/osconfig/agentendpoint/apiv1beta/version.go b/osconfig/agentendpoint/apiv1beta/version.go
new file mode 100644
index 0000000..219efc2
--- /dev/null
+++ b/osconfig/agentendpoint/apiv1beta/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package agentendpoint
+
+import "cloud.google.com/go/osconfig/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/osconfig/apiv1/doc.go b/osconfig/apiv1/doc.go
index 1cea15a..1007950 100644
--- a/osconfig/apiv1/doc.go
+++ b/osconfig/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/osconfig/apiv1/os_config_client.go b/osconfig/apiv1/os_config_client.go
index de2b8a8..cb1e24c 100644
--- a/osconfig/apiv1/os_config_client.go
+++ b/osconfig/apiv1/os_config_client.go
@@ -395,7 +395,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -412,6 +412,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExecutePatchJob[0:len((*c.CallOptions).ExecutePatchJob):len((*c.CallOptions).ExecutePatchJob)], opts...)
 	var resp *osconfigpb.PatchJob
@@ -433,6 +434,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPatchJob[0:len((*c.CallOptions).GetPatchJob):len((*c.CallOptions).GetPatchJob)], opts...)
 	var resp *osconfigpb.PatchJob
@@ -454,6 +456,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelPatchJob[0:len((*c.CallOptions).CancelPatchJob):len((*c.CallOptions).CancelPatchJob)], opts...)
 	var resp *osconfigpb.PatchJob
@@ -470,6 +473,7 @@
 
 func (c *gRPCClient) ListPatchJobs(ctx context.Context, req *osconfigpb.ListPatchJobsRequest, opts ...gax.CallOption) *PatchJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPatchJobs[0:len((*c.CallOptions).ListPatchJobs):len((*c.CallOptions).ListPatchJobs)], opts...)
 	it := &PatchJobIterator{}
@@ -514,6 +518,7 @@
 
 func (c *gRPCClient) ListPatchJobInstanceDetails(ctx context.Context, req *osconfigpb.ListPatchJobInstanceDetailsRequest, opts ...gax.CallOption) *PatchJobInstanceDetailsIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPatchJobInstanceDetails[0:len((*c.CallOptions).ListPatchJobInstanceDetails):len((*c.CallOptions).ListPatchJobInstanceDetails)], opts...)
 	it := &PatchJobInstanceDetailsIterator{}
@@ -563,6 +568,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreatePatchDeployment[0:len((*c.CallOptions).CreatePatchDeployment):len((*c.CallOptions).CreatePatchDeployment)], opts...)
 	var resp *osconfigpb.PatchDeployment
@@ -584,6 +590,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPatchDeployment[0:len((*c.CallOptions).GetPatchDeployment):len((*c.CallOptions).GetPatchDeployment)], opts...)
 	var resp *osconfigpb.PatchDeployment
@@ -600,6 +607,7 @@
 
 func (c *gRPCClient) ListPatchDeployments(ctx context.Context, req *osconfigpb.ListPatchDeploymentsRequest, opts ...gax.CallOption) *PatchDeploymentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPatchDeployments[0:len((*c.CallOptions).ListPatchDeployments):len((*c.CallOptions).ListPatchDeployments)], opts...)
 	it := &PatchDeploymentIterator{}
@@ -649,6 +657,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePatchDeployment[0:len((*c.CallOptions).DeletePatchDeployment):len((*c.CallOptions).DeletePatchDeployment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -666,6 +675,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "patch_deployment.name", url.QueryEscape(req.GetPatchDeployment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdatePatchDeployment[0:len((*c.CallOptions).UpdatePatchDeployment):len((*c.CallOptions).UpdatePatchDeployment)], opts...)
 	var resp *osconfigpb.PatchDeployment
@@ -687,6 +697,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PausePatchDeployment[0:len((*c.CallOptions).PausePatchDeployment):len((*c.CallOptions).PausePatchDeployment)], opts...)
 	var resp *osconfigpb.PatchDeployment
@@ -708,6 +719,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResumePatchDeployment[0:len((*c.CallOptions).ResumePatchDeployment):len((*c.CallOptions).ResumePatchDeployment)], opts...)
 	var resp *osconfigpb.PatchDeployment
diff --git a/osconfig/apiv1/os_config_zonal_client.go b/osconfig/apiv1/os_config_zonal_client.go
index 557f332..c458ae4 100644
--- a/osconfig/apiv1/os_config_zonal_client.go
+++ b/osconfig/apiv1/os_config_zonal_client.go
@@ -473,7 +473,7 @@
 // use by Google-written clients.
 func (c *osConfigZonalGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -490,6 +490,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateOSPolicyAssignment[0:len((*c.CallOptions).CreateOSPolicyAssignment):len((*c.CallOptions).CreateOSPolicyAssignment)], opts...)
 	var resp *longrunningpb.Operation
@@ -513,6 +514,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "os_policy_assignment.name", url.QueryEscape(req.GetOsPolicyAssignment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateOSPolicyAssignment[0:len((*c.CallOptions).UpdateOSPolicyAssignment):len((*c.CallOptions).UpdateOSPolicyAssignment)], opts...)
 	var resp *longrunningpb.Operation
@@ -536,6 +538,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetOSPolicyAssignment[0:len((*c.CallOptions).GetOSPolicyAssignment):len((*c.CallOptions).GetOSPolicyAssignment)], opts...)
 	var resp *osconfigpb.OSPolicyAssignment
@@ -552,6 +555,7 @@
 
 func (c *osConfigZonalGRPCClient) ListOSPolicyAssignments(ctx context.Context, req *osconfigpb.ListOSPolicyAssignmentsRequest, opts ...gax.CallOption) *OSPolicyAssignmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListOSPolicyAssignments[0:len((*c.CallOptions).ListOSPolicyAssignments):len((*c.CallOptions).ListOSPolicyAssignments)], opts...)
 	it := &OSPolicyAssignmentIterator{}
@@ -596,6 +600,7 @@
 
 func (c *osConfigZonalGRPCClient) ListOSPolicyAssignmentRevisions(ctx context.Context, req *osconfigpb.ListOSPolicyAssignmentRevisionsRequest, opts ...gax.CallOption) *OSPolicyAssignmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListOSPolicyAssignmentRevisions[0:len((*c.CallOptions).ListOSPolicyAssignmentRevisions):len((*c.CallOptions).ListOSPolicyAssignmentRevisions)], opts...)
 	it := &OSPolicyAssignmentIterator{}
@@ -645,6 +650,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteOSPolicyAssignment[0:len((*c.CallOptions).DeleteOSPolicyAssignment):len((*c.CallOptions).DeleteOSPolicyAssignment)], opts...)
 	var resp *longrunningpb.Operation
@@ -668,6 +674,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetOSPolicyAssignmentReport[0:len((*c.CallOptions).GetOSPolicyAssignmentReport):len((*c.CallOptions).GetOSPolicyAssignmentReport)], opts...)
 	var resp *osconfigpb.OSPolicyAssignmentReport
@@ -684,6 +691,7 @@
 
 func (c *osConfigZonalGRPCClient) ListOSPolicyAssignmentReports(ctx context.Context, req *osconfigpb.ListOSPolicyAssignmentReportsRequest, opts ...gax.CallOption) *OSPolicyAssignmentReportIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListOSPolicyAssignmentReports[0:len((*c.CallOptions).ListOSPolicyAssignmentReports):len((*c.CallOptions).ListOSPolicyAssignmentReports)], opts...)
 	it := &OSPolicyAssignmentReportIterator{}
@@ -733,6 +741,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInventory[0:len((*c.CallOptions).GetInventory):len((*c.CallOptions).GetInventory)], opts...)
 	var resp *osconfigpb.Inventory
@@ -749,6 +758,7 @@
 
 func (c *osConfigZonalGRPCClient) ListInventories(ctx context.Context, req *osconfigpb.ListInventoriesRequest, opts ...gax.CallOption) *InventoryIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInventories[0:len((*c.CallOptions).ListInventories):len((*c.CallOptions).ListInventories)], opts...)
 	it := &InventoryIterator{}
@@ -798,6 +808,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetVulnerabilityReport[0:len((*c.CallOptions).GetVulnerabilityReport):len((*c.CallOptions).GetVulnerabilityReport)], opts...)
 	var resp *osconfigpb.VulnerabilityReport
@@ -814,6 +825,7 @@
 
 func (c *osConfigZonalGRPCClient) ListVulnerabilityReports(ctx context.Context, req *osconfigpb.ListVulnerabilityReportsRequest, opts ...gax.CallOption) *VulnerabilityReportIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListVulnerabilityReports[0:len((*c.CallOptions).ListVulnerabilityReports):len((*c.CallOptions).ListVulnerabilityReports)], opts...)
 	it := &VulnerabilityReportIterator{}
diff --git a/osconfig/apiv1/version.go b/osconfig/apiv1/version.go
new file mode 100644
index 0000000..08c1f41
--- /dev/null
+++ b/osconfig/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package osconfig
+
+import "cloud.google.com/go/osconfig/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/osconfig/apiv1alpha/doc.go b/osconfig/apiv1alpha/doc.go
index 09ab7f0..c491551 100644
--- a/osconfig/apiv1alpha/doc.go
+++ b/osconfig/apiv1alpha/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/osconfig/apiv1alpha/os_config_zonal_client.go b/osconfig/apiv1alpha/os_config_zonal_client.go
index 377aae7..d845b8b 100644
--- a/osconfig/apiv1alpha/os_config_zonal_client.go
+++ b/osconfig/apiv1alpha/os_config_zonal_client.go
@@ -515,7 +515,7 @@
 // use by Google-written clients.
 func (c *osConfigZonalGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -532,6 +532,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateOSPolicyAssignment[0:len((*c.CallOptions).CreateOSPolicyAssignment):len((*c.CallOptions).CreateOSPolicyAssignment)], opts...)
 	var resp *longrunningpb.Operation
@@ -555,6 +556,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "os_policy_assignment.name", url.QueryEscape(req.GetOsPolicyAssignment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateOSPolicyAssignment[0:len((*c.CallOptions).UpdateOSPolicyAssignment):len((*c.CallOptions).UpdateOSPolicyAssignment)], opts...)
 	var resp *longrunningpb.Operation
@@ -578,6 +580,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetOSPolicyAssignment[0:len((*c.CallOptions).GetOSPolicyAssignment):len((*c.CallOptions).GetOSPolicyAssignment)], opts...)
 	var resp *osconfigpb.OSPolicyAssignment
@@ -594,6 +597,7 @@
 
 func (c *osConfigZonalGRPCClient) ListOSPolicyAssignments(ctx context.Context, req *osconfigpb.ListOSPolicyAssignmentsRequest, opts ...gax.CallOption) *OSPolicyAssignmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListOSPolicyAssignments[0:len((*c.CallOptions).ListOSPolicyAssignments):len((*c.CallOptions).ListOSPolicyAssignments)], opts...)
 	it := &OSPolicyAssignmentIterator{}
@@ -638,6 +642,7 @@
 
 func (c *osConfigZonalGRPCClient) ListOSPolicyAssignmentRevisions(ctx context.Context, req *osconfigpb.ListOSPolicyAssignmentRevisionsRequest, opts ...gax.CallOption) *OSPolicyAssignmentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListOSPolicyAssignmentRevisions[0:len((*c.CallOptions).ListOSPolicyAssignmentRevisions):len((*c.CallOptions).ListOSPolicyAssignmentRevisions)], opts...)
 	it := &OSPolicyAssignmentIterator{}
@@ -687,6 +692,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteOSPolicyAssignment[0:len((*c.CallOptions).DeleteOSPolicyAssignment):len((*c.CallOptions).DeleteOSPolicyAssignment)], opts...)
 	var resp *longrunningpb.Operation
@@ -710,6 +716,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstanceOSPoliciesCompliance[0:len((*c.CallOptions).GetInstanceOSPoliciesCompliance):len((*c.CallOptions).GetInstanceOSPoliciesCompliance)], opts...)
 	var resp *osconfigpb.InstanceOSPoliciesCompliance
@@ -726,6 +733,7 @@
 
 func (c *osConfigZonalGRPCClient) ListInstanceOSPoliciesCompliances(ctx context.Context, req *osconfigpb.ListInstanceOSPoliciesCompliancesRequest, opts ...gax.CallOption) *InstanceOSPoliciesComplianceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInstanceOSPoliciesCompliances[0:len((*c.CallOptions).ListInstanceOSPoliciesCompliances):len((*c.CallOptions).ListInstanceOSPoliciesCompliances)], opts...)
 	it := &InstanceOSPoliciesComplianceIterator{}
@@ -775,6 +783,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetOSPolicyAssignmentReport[0:len((*c.CallOptions).GetOSPolicyAssignmentReport):len((*c.CallOptions).GetOSPolicyAssignmentReport)], opts...)
 	var resp *osconfigpb.OSPolicyAssignmentReport
@@ -791,6 +800,7 @@
 
 func (c *osConfigZonalGRPCClient) ListOSPolicyAssignmentReports(ctx context.Context, req *osconfigpb.ListOSPolicyAssignmentReportsRequest, opts ...gax.CallOption) *OSPolicyAssignmentReportIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListOSPolicyAssignmentReports[0:len((*c.CallOptions).ListOSPolicyAssignmentReports):len((*c.CallOptions).ListOSPolicyAssignmentReports)], opts...)
 	it := &OSPolicyAssignmentReportIterator{}
@@ -840,6 +850,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInventory[0:len((*c.CallOptions).GetInventory):len((*c.CallOptions).GetInventory)], opts...)
 	var resp *osconfigpb.Inventory
@@ -856,6 +867,7 @@
 
 func (c *osConfigZonalGRPCClient) ListInventories(ctx context.Context, req *osconfigpb.ListInventoriesRequest, opts ...gax.CallOption) *InventoryIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInventories[0:len((*c.CallOptions).ListInventories):len((*c.CallOptions).ListInventories)], opts...)
 	it := &InventoryIterator{}
@@ -905,6 +917,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetVulnerabilityReport[0:len((*c.CallOptions).GetVulnerabilityReport):len((*c.CallOptions).GetVulnerabilityReport)], opts...)
 	var resp *osconfigpb.VulnerabilityReport
@@ -921,6 +934,7 @@
 
 func (c *osConfigZonalGRPCClient) ListVulnerabilityReports(ctx context.Context, req *osconfigpb.ListVulnerabilityReportsRequest, opts ...gax.CallOption) *VulnerabilityReportIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListVulnerabilityReports[0:len((*c.CallOptions).ListVulnerabilityReports):len((*c.CallOptions).ListVulnerabilityReports)], opts...)
 	it := &VulnerabilityReportIterator{}
diff --git a/osconfig/apiv1alpha/version.go b/osconfig/apiv1alpha/version.go
new file mode 100644
index 0000000..08c1f41
--- /dev/null
+++ b/osconfig/apiv1alpha/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package osconfig
+
+import "cloud.google.com/go/osconfig/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/osconfig/apiv1beta/doc.go b/osconfig/apiv1beta/doc.go
index d432377..1b4af32 100644
--- a/osconfig/apiv1beta/doc.go
+++ b/osconfig/apiv1beta/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/osconfig/apiv1beta/os_config_client.go b/osconfig/apiv1beta/os_config_client.go
index 4a64603..3e44904 100644
--- a/osconfig/apiv1beta/os_config_client.go
+++ b/osconfig/apiv1beta/os_config_client.go
@@ -504,7 +504,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -521,6 +521,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExecutePatchJob[0:len((*c.CallOptions).ExecutePatchJob):len((*c.CallOptions).ExecutePatchJob)], opts...)
 	var resp *osconfigpb.PatchJob
@@ -542,6 +543,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPatchJob[0:len((*c.CallOptions).GetPatchJob):len((*c.CallOptions).GetPatchJob)], opts...)
 	var resp *osconfigpb.PatchJob
@@ -563,6 +565,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelPatchJob[0:len((*c.CallOptions).CancelPatchJob):len((*c.CallOptions).CancelPatchJob)], opts...)
 	var resp *osconfigpb.PatchJob
@@ -579,6 +582,7 @@
 
 func (c *gRPCClient) ListPatchJobs(ctx context.Context, req *osconfigpb.ListPatchJobsRequest, opts ...gax.CallOption) *PatchJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPatchJobs[0:len((*c.CallOptions).ListPatchJobs):len((*c.CallOptions).ListPatchJobs)], opts...)
 	it := &PatchJobIterator{}
@@ -623,6 +627,7 @@
 
 func (c *gRPCClient) ListPatchJobInstanceDetails(ctx context.Context, req *osconfigpb.ListPatchJobInstanceDetailsRequest, opts ...gax.CallOption) *PatchJobInstanceDetailsIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPatchJobInstanceDetails[0:len((*c.CallOptions).ListPatchJobInstanceDetails):len((*c.CallOptions).ListPatchJobInstanceDetails)], opts...)
 	it := &PatchJobInstanceDetailsIterator{}
@@ -672,6 +677,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreatePatchDeployment[0:len((*c.CallOptions).CreatePatchDeployment):len((*c.CallOptions).CreatePatchDeployment)], opts...)
 	var resp *osconfigpb.PatchDeployment
@@ -693,6 +699,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPatchDeployment[0:len((*c.CallOptions).GetPatchDeployment):len((*c.CallOptions).GetPatchDeployment)], opts...)
 	var resp *osconfigpb.PatchDeployment
@@ -709,6 +716,7 @@
 
 func (c *gRPCClient) ListPatchDeployments(ctx context.Context, req *osconfigpb.ListPatchDeploymentsRequest, opts ...gax.CallOption) *PatchDeploymentIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPatchDeployments[0:len((*c.CallOptions).ListPatchDeployments):len((*c.CallOptions).ListPatchDeployments)], opts...)
 	it := &PatchDeploymentIterator{}
@@ -758,6 +766,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePatchDeployment[0:len((*c.CallOptions).DeletePatchDeployment):len((*c.CallOptions).DeletePatchDeployment)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -775,6 +784,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "patch_deployment.name", url.QueryEscape(req.GetPatchDeployment().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdatePatchDeployment[0:len((*c.CallOptions).UpdatePatchDeployment):len((*c.CallOptions).UpdatePatchDeployment)], opts...)
 	var resp *osconfigpb.PatchDeployment
@@ -796,6 +806,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PausePatchDeployment[0:len((*c.CallOptions).PausePatchDeployment):len((*c.CallOptions).PausePatchDeployment)], opts...)
 	var resp *osconfigpb.PatchDeployment
@@ -817,6 +828,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResumePatchDeployment[0:len((*c.CallOptions).ResumePatchDeployment):len((*c.CallOptions).ResumePatchDeployment)], opts...)
 	var resp *osconfigpb.PatchDeployment
@@ -838,6 +850,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGuestPolicy[0:len((*c.CallOptions).CreateGuestPolicy):len((*c.CallOptions).CreateGuestPolicy)], opts...)
 	var resp *osconfigpb.GuestPolicy
@@ -859,6 +872,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGuestPolicy[0:len((*c.CallOptions).GetGuestPolicy):len((*c.CallOptions).GetGuestPolicy)], opts...)
 	var resp *osconfigpb.GuestPolicy
@@ -875,6 +889,7 @@
 
 func (c *gRPCClient) ListGuestPolicies(ctx context.Context, req *osconfigpb.ListGuestPoliciesRequest, opts ...gax.CallOption) *GuestPolicyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGuestPolicies[0:len((*c.CallOptions).ListGuestPolicies):len((*c.CallOptions).ListGuestPolicies)], opts...)
 	it := &GuestPolicyIterator{}
@@ -924,6 +939,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "guest_policy.name", url.QueryEscape(req.GetGuestPolicy().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGuestPolicy[0:len((*c.CallOptions).UpdateGuestPolicy):len((*c.CallOptions).UpdateGuestPolicy)], opts...)
 	var resp *osconfigpb.GuestPolicy
@@ -945,6 +961,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGuestPolicy[0:len((*c.CallOptions).DeleteGuestPolicy):len((*c.CallOptions).DeleteGuestPolicy)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -962,6 +979,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "instance", url.QueryEscape(req.GetInstance())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).LookupEffectiveGuestPolicy[0:len((*c.CallOptions).LookupEffectiveGuestPolicy):len((*c.CallOptions).LookupEffectiveGuestPolicy)], opts...)
 	var resp *osconfigpb.EffectiveGuestPolicy
diff --git a/osconfig/apiv1beta/version.go b/osconfig/apiv1beta/version.go
new file mode 100644
index 0000000..08c1f41
--- /dev/null
+++ b/osconfig/apiv1beta/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package osconfig
+
+import "cloud.google.com/go/osconfig/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/oslogin/apiv1/doc.go b/oslogin/apiv1/doc.go
index 0a318ab..3e3021e 100644
--- a/oslogin/apiv1/doc.go
+++ b/oslogin/apiv1/doc.go
@@ -83,7 +83,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/oslogin/apiv1/os_login_client.go b/oslogin/apiv1/os_login_client.go
index 94c8d8a..340fff8 100644
--- a/oslogin/apiv1/os_login_client.go
+++ b/oslogin/apiv1/os_login_client.go
@@ -292,7 +292,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -309,6 +309,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePosixAccount[0:len((*c.CallOptions).DeletePosixAccount):len((*c.CallOptions).DeletePosixAccount)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -326,6 +327,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSshPublicKey[0:len((*c.CallOptions).DeleteSshPublicKey):len((*c.CallOptions).DeleteSshPublicKey)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -343,6 +345,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetLoginProfile[0:len((*c.CallOptions).GetLoginProfile):len((*c.CallOptions).GetLoginProfile)], opts...)
 	var resp *osloginpb.LoginProfile
@@ -364,6 +367,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSshPublicKey[0:len((*c.CallOptions).GetSshPublicKey):len((*c.CallOptions).GetSshPublicKey)], opts...)
 	var resp *commonpb.SshPublicKey
@@ -385,6 +389,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportSshPublicKey[0:len((*c.CallOptions).ImportSshPublicKey):len((*c.CallOptions).ImportSshPublicKey)], opts...)
 	var resp *osloginpb.ImportSshPublicKeyResponse
@@ -406,6 +411,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSshPublicKey[0:len((*c.CallOptions).UpdateSshPublicKey):len((*c.CallOptions).UpdateSshPublicKey)], opts...)
 	var resp *commonpb.SshPublicKey
diff --git a/oslogin/apiv1/version.go b/oslogin/apiv1/version.go
new file mode 100644
index 0000000..6ee1813
--- /dev/null
+++ b/oslogin/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package oslogin
+
+import "cloud.google.com/go/oslogin/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/oslogin/apiv1beta/doc.go b/oslogin/apiv1beta/doc.go
index bc8356f..d470ccc 100644
--- a/oslogin/apiv1beta/doc.go
+++ b/oslogin/apiv1beta/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/oslogin/apiv1beta/os_login_client.go b/oslogin/apiv1beta/os_login_client.go
index daf6fe2..86d6e8c 100644
--- a/oslogin/apiv1beta/os_login_client.go
+++ b/oslogin/apiv1beta/os_login_client.go
@@ -292,7 +292,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -309,6 +309,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePosixAccount[0:len((*c.CallOptions).DeletePosixAccount):len((*c.CallOptions).DeletePosixAccount)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -326,6 +327,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSshPublicKey[0:len((*c.CallOptions).DeleteSshPublicKey):len((*c.CallOptions).DeleteSshPublicKey)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -343,6 +345,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetLoginProfile[0:len((*c.CallOptions).GetLoginProfile):len((*c.CallOptions).GetLoginProfile)], opts...)
 	var resp *osloginpb.LoginProfile
@@ -364,6 +367,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSshPublicKey[0:len((*c.CallOptions).GetSshPublicKey):len((*c.CallOptions).GetSshPublicKey)], opts...)
 	var resp *commonpb.SshPublicKey
@@ -385,6 +389,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportSshPublicKey[0:len((*c.CallOptions).ImportSshPublicKey):len((*c.CallOptions).ImportSshPublicKey)], opts...)
 	var resp *osloginpb.ImportSshPublicKeyResponse
@@ -406,6 +411,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSshPublicKey[0:len((*c.CallOptions).UpdateSshPublicKey):len((*c.CallOptions).UpdateSshPublicKey)], opts...)
 	var resp *commonpb.SshPublicKey
diff --git a/oslogin/apiv1beta/version.go b/oslogin/apiv1beta/version.go
new file mode 100644
index 0000000..6ee1813
--- /dev/null
+++ b/oslogin/apiv1beta/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package oslogin
+
+import "cloud.google.com/go/oslogin/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/phishingprotection/apiv1beta1/doc.go b/phishingprotection/apiv1beta1/doc.go
index 660ab89..ec500ea 100644
--- a/phishingprotection/apiv1beta1/doc.go
+++ b/phishingprotection/apiv1beta1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/phishingprotection/apiv1beta1/phishing_protection_service_v1_beta1_client.go b/phishingprotection/apiv1beta1/phishing_protection_service_v1_beta1_client.go
index a0bc232..69b4836 100644
--- a/phishingprotection/apiv1beta1/phishing_protection_service_v1_beta1_client.go
+++ b/phishingprotection/apiv1beta1/phishing_protection_service_v1_beta1_client.go
@@ -180,7 +180,7 @@
 // use by Google-written clients.
 func (c *phishingProtectionServiceV1Beta1GRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -197,6 +197,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReportPhishing[0:len((*c.CallOptions).ReportPhishing):len((*c.CallOptions).ReportPhishing)], opts...)
 	var resp *phishingprotectionpb.ReportPhishingResponse
diff --git a/phishingprotection/apiv1beta1/version.go b/phishingprotection/apiv1beta1/version.go
new file mode 100644
index 0000000..dca4179
--- /dev/null
+++ b/phishingprotection/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package phishingprotection
+
+import "cloud.google.com/go/phishingprotection/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/policytroubleshooter/apiv1/doc.go b/policytroubleshooter/apiv1/doc.go
index 1b131af..bcc0b09 100644
--- a/policytroubleshooter/apiv1/doc.go
+++ b/policytroubleshooter/apiv1/doc.go
@@ -82,7 +82,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/policytroubleshooter/apiv1/iam_checker_client.go b/policytroubleshooter/apiv1/iam_checker_client.go
index 971ce71..a59ba05 100644
--- a/policytroubleshooter/apiv1/iam_checker_client.go
+++ b/policytroubleshooter/apiv1/iam_checker_client.go
@@ -177,7 +177,7 @@
 // use by Google-written clients.
 func (c *iamCheckerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/policytroubleshooter/apiv1/version.go b/policytroubleshooter/apiv1/version.go
new file mode 100644
index 0000000..32c562b
--- /dev/null
+++ b/policytroubleshooter/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package policytroubleshooter
+
+import "cloud.google.com/go/policytroubleshooter/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/privatecatalog/apiv1beta1/doc.go b/privatecatalog/apiv1beta1/doc.go
index 0613b79..20572e1 100644
--- a/privatecatalog/apiv1beta1/doc.go
+++ b/privatecatalog/apiv1beta1/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/privatecatalog/apiv1beta1/private_catalog_client.go b/privatecatalog/apiv1beta1/private_catalog_client.go
index 7180104..1ef27fb 100644
--- a/privatecatalog/apiv1beta1/private_catalog_client.go
+++ b/privatecatalog/apiv1beta1/private_catalog_client.go
@@ -234,7 +234,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -246,6 +246,7 @@
 
 func (c *gRPCClient) SearchCatalogs(ctx context.Context, req *privatecatalogpb.SearchCatalogsRequest, opts ...gax.CallOption) *CatalogIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchCatalogs[0:len((*c.CallOptions).SearchCatalogs):len((*c.CallOptions).SearchCatalogs)], opts...)
 	it := &CatalogIterator{}
@@ -290,6 +291,7 @@
 
 func (c *gRPCClient) SearchProducts(ctx context.Context, req *privatecatalogpb.SearchProductsRequest, opts ...gax.CallOption) *ProductIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchProducts[0:len((*c.CallOptions).SearchProducts):len((*c.CallOptions).SearchProducts)], opts...)
 	it := &ProductIterator{}
@@ -334,6 +336,7 @@
 
 func (c *gRPCClient) SearchVersions(ctx context.Context, req *privatecatalogpb.SearchVersionsRequest, opts ...gax.CallOption) *VersionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchVersions[0:len((*c.CallOptions).SearchVersions):len((*c.CallOptions).SearchVersions)], opts...)
 	it := &VersionIterator{}
diff --git a/privatecatalog/apiv1beta1/version.go b/privatecatalog/apiv1beta1/version.go
new file mode 100644
index 0000000..91f1b4d
--- /dev/null
+++ b/privatecatalog/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package privatecatalog
+
+import "cloud.google.com/go/privatecatalog/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/pubsub/apiv1/doc.go b/pubsub/apiv1/doc.go
index 513f065..e097b95 100644
--- a/pubsub/apiv1/doc.go
+++ b/pubsub/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/pubsub/apiv1/publisher_client.go b/pubsub/apiv1/publisher_client.go
index e90d254..fe1aa92 100644
--- a/pubsub/apiv1/publisher_client.go
+++ b/pubsub/apiv1/publisher_client.go
@@ -400,7 +400,7 @@
 // use by Google-written clients.
 func (c *publisherGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -417,6 +417,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTopic[0:len((*c.CallOptions).CreateTopic):len((*c.CallOptions).CreateTopic)], opts...)
 	var resp *pubsubpb.Topic
@@ -438,6 +439,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "topic.name", url.QueryEscape(req.GetTopic().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTopic[0:len((*c.CallOptions).UpdateTopic):len((*c.CallOptions).UpdateTopic)], opts...)
 	var resp *pubsubpb.Topic
@@ -459,6 +461,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "topic", url.QueryEscape(req.GetTopic())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Publish[0:len((*c.CallOptions).Publish):len((*c.CallOptions).Publish)], opts...)
 	var resp *pubsubpb.PublishResponse
@@ -480,6 +483,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "topic", url.QueryEscape(req.GetTopic())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTopic[0:len((*c.CallOptions).GetTopic):len((*c.CallOptions).GetTopic)], opts...)
 	var resp *pubsubpb.Topic
@@ -496,6 +500,7 @@
 
 func (c *publisherGRPCClient) ListTopics(ctx context.Context, req *pubsubpb.ListTopicsRequest, opts ...gax.CallOption) *TopicIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project", url.QueryEscape(req.GetProject())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTopics[0:len((*c.CallOptions).ListTopics):len((*c.CallOptions).ListTopics)], opts...)
 	it := &TopicIterator{}
@@ -540,6 +545,7 @@
 
 func (c *publisherGRPCClient) ListTopicSubscriptions(ctx context.Context, req *pubsubpb.ListTopicSubscriptionsRequest, opts ...gax.CallOption) *StringIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "topic", url.QueryEscape(req.GetTopic())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTopicSubscriptions[0:len((*c.CallOptions).ListTopicSubscriptions):len((*c.CallOptions).ListTopicSubscriptions)], opts...)
 	it := &StringIterator{}
@@ -584,6 +590,7 @@
 
 func (c *publisherGRPCClient) ListTopicSnapshots(ctx context.Context, req *pubsubpb.ListTopicSnapshotsRequest, opts ...gax.CallOption) *StringIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "topic", url.QueryEscape(req.GetTopic())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTopicSnapshots[0:len((*c.CallOptions).ListTopicSnapshots):len((*c.CallOptions).ListTopicSnapshots)], opts...)
 	it := &StringIterator{}
@@ -633,6 +640,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "topic", url.QueryEscape(req.GetTopic())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTopic[0:len((*c.CallOptions).DeleteTopic):len((*c.CallOptions).DeleteTopic)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -650,6 +658,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "subscription", url.QueryEscape(req.GetSubscription())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DetachSubscription[0:len((*c.CallOptions).DetachSubscription):len((*c.CallOptions).DetachSubscription)], opts...)
 	var resp *pubsubpb.DetachSubscriptionResponse
diff --git a/pubsub/apiv1/schema_client.go b/pubsub/apiv1/schema_client.go
index 05e64ea..29532e0 100644
--- a/pubsub/apiv1/schema_client.go
+++ b/pubsub/apiv1/schema_client.go
@@ -254,7 +254,7 @@
 // use by Google-written clients.
 func (c *schemaGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -266,6 +266,7 @@
 
 func (c *schemaGRPCClient) CreateSchema(ctx context.Context, req *pubsubpb.CreateSchemaRequest, opts ...gax.CallOption) (*pubsubpb.Schema, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSchema[0:len((*c.CallOptions).CreateSchema):len((*c.CallOptions).CreateSchema)], opts...)
 	var resp *pubsubpb.Schema
@@ -282,6 +283,7 @@
 
 func (c *schemaGRPCClient) GetSchema(ctx context.Context, req *pubsubpb.GetSchemaRequest, opts ...gax.CallOption) (*pubsubpb.Schema, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSchema[0:len((*c.CallOptions).GetSchema):len((*c.CallOptions).GetSchema)], opts...)
 	var resp *pubsubpb.Schema
@@ -298,6 +300,7 @@
 
 func (c *schemaGRPCClient) ListSchemas(ctx context.Context, req *pubsubpb.ListSchemasRequest, opts ...gax.CallOption) *SchemaIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSchemas[0:len((*c.CallOptions).ListSchemas):len((*c.CallOptions).ListSchemas)], opts...)
 	it := &SchemaIterator{}
@@ -342,6 +345,7 @@
 
 func (c *schemaGRPCClient) DeleteSchema(ctx context.Context, req *pubsubpb.DeleteSchemaRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSchema[0:len((*c.CallOptions).DeleteSchema):len((*c.CallOptions).DeleteSchema)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -354,6 +358,7 @@
 
 func (c *schemaGRPCClient) ValidateSchema(ctx context.Context, req *pubsubpb.ValidateSchemaRequest, opts ...gax.CallOption) (*pubsubpb.ValidateSchemaResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ValidateSchema[0:len((*c.CallOptions).ValidateSchema):len((*c.CallOptions).ValidateSchema)], opts...)
 	var resp *pubsubpb.ValidateSchemaResponse
@@ -370,6 +375,7 @@
 
 func (c *schemaGRPCClient) ValidateMessage(ctx context.Context, req *pubsubpb.ValidateMessageRequest, opts ...gax.CallOption) (*pubsubpb.ValidateMessageResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ValidateMessage[0:len((*c.CallOptions).ValidateMessage):len((*c.CallOptions).ValidateMessage)], opts...)
 	var resp *pubsubpb.ValidateMessageResponse
diff --git a/pubsub/apiv1/subscriber_client.go b/pubsub/apiv1/subscriber_client.go
index ea34988..23a4462 100644
--- a/pubsub/apiv1/subscriber_client.go
+++ b/pubsub/apiv1/subscriber_client.go
@@ -597,7 +597,7 @@
 // use by Google-written clients.
 func (c *subscriberGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -614,6 +614,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSubscription[0:len((*c.CallOptions).CreateSubscription):len((*c.CallOptions).CreateSubscription)], opts...)
 	var resp *pubsubpb.Subscription
@@ -635,6 +636,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "subscription", url.QueryEscape(req.GetSubscription())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSubscription[0:len((*c.CallOptions).GetSubscription):len((*c.CallOptions).GetSubscription)], opts...)
 	var resp *pubsubpb.Subscription
@@ -656,6 +658,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "subscription.name", url.QueryEscape(req.GetSubscription().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSubscription[0:len((*c.CallOptions).UpdateSubscription):len((*c.CallOptions).UpdateSubscription)], opts...)
 	var resp *pubsubpb.Subscription
@@ -672,6 +675,7 @@
 
 func (c *subscriberGRPCClient) ListSubscriptions(ctx context.Context, req *pubsubpb.ListSubscriptionsRequest, opts ...gax.CallOption) *SubscriptionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project", url.QueryEscape(req.GetProject())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSubscriptions[0:len((*c.CallOptions).ListSubscriptions):len((*c.CallOptions).ListSubscriptions)], opts...)
 	it := &SubscriptionIterator{}
@@ -721,6 +725,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "subscription", url.QueryEscape(req.GetSubscription())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSubscription[0:len((*c.CallOptions).DeleteSubscription):len((*c.CallOptions).DeleteSubscription)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -738,6 +743,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "subscription", url.QueryEscape(req.GetSubscription())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ModifyAckDeadline[0:len((*c.CallOptions).ModifyAckDeadline):len((*c.CallOptions).ModifyAckDeadline)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -755,6 +761,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "subscription", url.QueryEscape(req.GetSubscription())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Acknowledge[0:len((*c.CallOptions).Acknowledge):len((*c.CallOptions).Acknowledge)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -772,6 +779,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "subscription", url.QueryEscape(req.GetSubscription())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Pull[0:len((*c.CallOptions).Pull):len((*c.CallOptions).Pull)], opts...)
 	var resp *pubsubpb.PullResponse
@@ -808,6 +816,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "subscription", url.QueryEscape(req.GetSubscription())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ModifyPushConfig[0:len((*c.CallOptions).ModifyPushConfig):len((*c.CallOptions).ModifyPushConfig)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -825,6 +834,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "snapshot", url.QueryEscape(req.GetSnapshot())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSnapshot[0:len((*c.CallOptions).GetSnapshot):len((*c.CallOptions).GetSnapshot)], opts...)
 	var resp *pubsubpb.Snapshot
@@ -841,6 +851,7 @@
 
 func (c *subscriberGRPCClient) ListSnapshots(ctx context.Context, req *pubsubpb.ListSnapshotsRequest, opts ...gax.CallOption) *SnapshotIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project", url.QueryEscape(req.GetProject())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSnapshots[0:len((*c.CallOptions).ListSnapshots):len((*c.CallOptions).ListSnapshots)], opts...)
 	it := &SnapshotIterator{}
@@ -890,6 +901,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSnapshot[0:len((*c.CallOptions).CreateSnapshot):len((*c.CallOptions).CreateSnapshot)], opts...)
 	var resp *pubsubpb.Snapshot
@@ -911,6 +923,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "snapshot.name", url.QueryEscape(req.GetSnapshot().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSnapshot[0:len((*c.CallOptions).UpdateSnapshot):len((*c.CallOptions).UpdateSnapshot)], opts...)
 	var resp *pubsubpb.Snapshot
@@ -932,6 +945,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "snapshot", url.QueryEscape(req.GetSnapshot())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSnapshot[0:len((*c.CallOptions).DeleteSnapshot):len((*c.CallOptions).DeleteSnapshot)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -949,6 +963,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "subscription", url.QueryEscape(req.GetSubscription())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Seek[0:len((*c.CallOptions).Seek):len((*c.CallOptions).Seek)], opts...)
 	var resp *pubsubpb.SeekResponse
diff --git a/pubsub/apiv1/version.go b/pubsub/apiv1/version.go
new file mode 100644
index 0000000..7ba352b
--- /dev/null
+++ b/pubsub/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package pubsub
+
+import "cloud.google.com/go/pubsub/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/pubsublite/apiv1/admin_client.go b/pubsublite/apiv1/admin_client.go
index 0ae884c..72e7bd3 100644
--- a/pubsublite/apiv1/admin_client.go
+++ b/pubsublite/apiv1/admin_client.go
@@ -640,7 +640,7 @@
 // use by Google-written clients.
 func (c *adminGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -657,6 +657,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTopic[0:len((*c.CallOptions).CreateTopic):len((*c.CallOptions).CreateTopic)], opts...)
 	var resp *pubsublitepb.Topic
@@ -678,6 +679,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTopic[0:len((*c.CallOptions).GetTopic):len((*c.CallOptions).GetTopic)], opts...)
 	var resp *pubsublitepb.Topic
@@ -699,6 +701,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTopicPartitions[0:len((*c.CallOptions).GetTopicPartitions):len((*c.CallOptions).GetTopicPartitions)], opts...)
 	var resp *pubsublitepb.TopicPartitions
@@ -715,6 +718,7 @@
 
 func (c *adminGRPCClient) ListTopics(ctx context.Context, req *pubsublitepb.ListTopicsRequest, opts ...gax.CallOption) *TopicIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTopics[0:len((*c.CallOptions).ListTopics):len((*c.CallOptions).ListTopics)], opts...)
 	it := &TopicIterator{}
@@ -764,6 +768,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "topic.name", url.QueryEscape(req.GetTopic().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTopic[0:len((*c.CallOptions).UpdateTopic):len((*c.CallOptions).UpdateTopic)], opts...)
 	var resp *pubsublitepb.Topic
@@ -785,6 +790,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTopic[0:len((*c.CallOptions).DeleteTopic):len((*c.CallOptions).DeleteTopic)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -797,6 +803,7 @@
 
 func (c *adminGRPCClient) ListTopicSubscriptions(ctx context.Context, req *pubsublitepb.ListTopicSubscriptionsRequest, opts ...gax.CallOption) *StringIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTopicSubscriptions[0:len((*c.CallOptions).ListTopicSubscriptions):len((*c.CallOptions).ListTopicSubscriptions)], opts...)
 	it := &StringIterator{}
@@ -846,6 +853,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSubscription[0:len((*c.CallOptions).CreateSubscription):len((*c.CallOptions).CreateSubscription)], opts...)
 	var resp *pubsublitepb.Subscription
@@ -867,6 +875,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSubscription[0:len((*c.CallOptions).GetSubscription):len((*c.CallOptions).GetSubscription)], opts...)
 	var resp *pubsublitepb.Subscription
@@ -883,6 +892,7 @@
 
 func (c *adminGRPCClient) ListSubscriptions(ctx context.Context, req *pubsublitepb.ListSubscriptionsRequest, opts ...gax.CallOption) *SubscriptionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSubscriptions[0:len((*c.CallOptions).ListSubscriptions):len((*c.CallOptions).ListSubscriptions)], opts...)
 	it := &SubscriptionIterator{}
@@ -932,6 +942,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "subscription.name", url.QueryEscape(req.GetSubscription().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSubscription[0:len((*c.CallOptions).UpdateSubscription):len((*c.CallOptions).UpdateSubscription)], opts...)
 	var resp *pubsublitepb.Subscription
@@ -953,6 +964,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSubscription[0:len((*c.CallOptions).DeleteSubscription):len((*c.CallOptions).DeleteSubscription)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -970,6 +982,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SeekSubscription[0:len((*c.CallOptions).SeekSubscription):len((*c.CallOptions).SeekSubscription)], opts...)
 	var resp *longrunningpb.Operation
@@ -993,6 +1006,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateReservation[0:len((*c.CallOptions).CreateReservation):len((*c.CallOptions).CreateReservation)], opts...)
 	var resp *pubsublitepb.Reservation
@@ -1014,6 +1028,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetReservation[0:len((*c.CallOptions).GetReservation):len((*c.CallOptions).GetReservation)], opts...)
 	var resp *pubsublitepb.Reservation
@@ -1030,6 +1045,7 @@
 
 func (c *adminGRPCClient) ListReservations(ctx context.Context, req *pubsublitepb.ListReservationsRequest, opts ...gax.CallOption) *ReservationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListReservations[0:len((*c.CallOptions).ListReservations):len((*c.CallOptions).ListReservations)], opts...)
 	it := &ReservationIterator{}
@@ -1079,6 +1095,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "reservation.name", url.QueryEscape(req.GetReservation().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateReservation[0:len((*c.CallOptions).UpdateReservation):len((*c.CallOptions).UpdateReservation)], opts...)
 	var resp *pubsublitepb.Reservation
@@ -1100,6 +1117,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteReservation[0:len((*c.CallOptions).DeleteReservation):len((*c.CallOptions).DeleteReservation)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1112,6 +1130,7 @@
 
 func (c *adminGRPCClient) ListReservationTopics(ctx context.Context, req *pubsublitepb.ListReservationTopicsRequest, opts ...gax.CallOption) *StringIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListReservationTopics[0:len((*c.CallOptions).ListReservationTopics):len((*c.CallOptions).ListReservationTopics)], opts...)
 	it := &StringIterator{}
diff --git a/pubsublite/apiv1/cursor_client.go b/pubsublite/apiv1/cursor_client.go
index 8d1150c..868ffe4 100644
--- a/pubsublite/apiv1/cursor_client.go
+++ b/pubsublite/apiv1/cursor_client.go
@@ -225,7 +225,7 @@
 // use by Google-written clients.
 func (c *cursorGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -257,6 +257,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "subscription", url.QueryEscape(req.GetSubscription())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CommitCursor[0:len((*c.CallOptions).CommitCursor):len((*c.CallOptions).CommitCursor)], opts...)
 	var resp *pubsublitepb.CommitCursorResponse
@@ -273,6 +274,7 @@
 
 func (c *cursorGRPCClient) ListPartitionCursors(ctx context.Context, req *pubsublitepb.ListPartitionCursorsRequest, opts ...gax.CallOption) *PartitionCursorIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPartitionCursors[0:len((*c.CallOptions).ListPartitionCursors):len((*c.CallOptions).ListPartitionCursors)], opts...)
 	it := &PartitionCursorIterator{}
diff --git a/pubsublite/apiv1/doc.go b/pubsublite/apiv1/doc.go
index 5822645..262ab59 100644
--- a/pubsublite/apiv1/doc.go
+++ b/pubsublite/apiv1/doc.go
@@ -82,7 +82,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/pubsublite/apiv1/partition_assignment_client.go b/pubsublite/apiv1/partition_assignment_client.go
index 0e04718..cd71f6a 100644
--- a/pubsublite/apiv1/partition_assignment_client.go
+++ b/pubsublite/apiv1/partition_assignment_client.go
@@ -179,7 +179,7 @@
 // use by Google-written clients.
 func (c *partitionAssignmentGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/pubsublite/apiv1/publisher_client.go b/pubsublite/apiv1/publisher_client.go
index d607e99..7e493ac 100644
--- a/pubsublite/apiv1/publisher_client.go
+++ b/pubsublite/apiv1/publisher_client.go
@@ -183,7 +183,7 @@
 // use by Google-written clients.
 func (c *publisherGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/pubsublite/apiv1/subscriber_client.go b/pubsublite/apiv1/subscriber_client.go
index 928d60c..0f47856 100644
--- a/pubsublite/apiv1/subscriber_client.go
+++ b/pubsublite/apiv1/subscriber_client.go
@@ -173,7 +173,7 @@
 // use by Google-written clients.
 func (c *subscriberGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/pubsublite/apiv1/topic_stats_client.go b/pubsublite/apiv1/topic_stats_client.go
index 0d4aa4f..5827d54 100644
--- a/pubsublite/apiv1/topic_stats_client.go
+++ b/pubsublite/apiv1/topic_stats_client.go
@@ -240,7 +240,7 @@
 // use by Google-written clients.
 func (c *topicStatsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -257,6 +257,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "topic", url.QueryEscape(req.GetTopic())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ComputeMessageStats[0:len((*c.CallOptions).ComputeMessageStats):len((*c.CallOptions).ComputeMessageStats)], opts...)
 	var resp *pubsublitepb.ComputeMessageStatsResponse
@@ -278,6 +279,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "topic", url.QueryEscape(req.GetTopic())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ComputeHeadCursor[0:len((*c.CallOptions).ComputeHeadCursor):len((*c.CallOptions).ComputeHeadCursor)], opts...)
 	var resp *pubsublitepb.ComputeHeadCursorResponse
@@ -299,6 +301,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "topic", url.QueryEscape(req.GetTopic())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ComputeTimeCursor[0:len((*c.CallOptions).ComputeTimeCursor):len((*c.CallOptions).ComputeTimeCursor)], opts...)
 	var resp *pubsublitepb.ComputeTimeCursorResponse
diff --git a/pubsublite/apiv1/version.go b/pubsublite/apiv1/version.go
new file mode 100644
index 0000000..2cb1280
--- /dev/null
+++ b/pubsublite/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package pubsublite
+
+import "cloud.google.com/go/pubsublite/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/recaptchaenterprise/apiv1/doc.go b/recaptchaenterprise/apiv1/doc.go
index 120884a..de5e26d 100644
--- a/recaptchaenterprise/apiv1/doc.go
+++ b/recaptchaenterprise/apiv1/doc.go
@@ -82,7 +82,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/recaptchaenterprise/apiv1/recaptcha_enterprise_client.go b/recaptchaenterprise/apiv1/recaptcha_enterprise_client.go
index c9e4b2a..fea7a00 100644
--- a/recaptchaenterprise/apiv1/recaptcha_enterprise_client.go
+++ b/recaptchaenterprise/apiv1/recaptcha_enterprise_client.go
@@ -271,7 +271,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -288,6 +288,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAssessment[0:len((*c.CallOptions).CreateAssessment):len((*c.CallOptions).CreateAssessment)], opts...)
 	var resp *recaptchaenterprisepb.Assessment
@@ -309,6 +310,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AnnotateAssessment[0:len((*c.CallOptions).AnnotateAssessment):len((*c.CallOptions).AnnotateAssessment)], opts...)
 	var resp *recaptchaenterprisepb.AnnotateAssessmentResponse
@@ -330,6 +332,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateKey[0:len((*c.CallOptions).CreateKey):len((*c.CallOptions).CreateKey)], opts...)
 	var resp *recaptchaenterprisepb.Key
@@ -346,6 +349,7 @@
 
 func (c *gRPCClient) ListKeys(ctx context.Context, req *recaptchaenterprisepb.ListKeysRequest, opts ...gax.CallOption) *KeyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListKeys[0:len((*c.CallOptions).ListKeys):len((*c.CallOptions).ListKeys)], opts...)
 	it := &KeyIterator{}
@@ -395,6 +399,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetKey[0:len((*c.CallOptions).GetKey):len((*c.CallOptions).GetKey)], opts...)
 	var resp *recaptchaenterprisepb.Key
@@ -416,6 +421,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "key.name", url.QueryEscape(req.GetKey().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateKey[0:len((*c.CallOptions).UpdateKey):len((*c.CallOptions).UpdateKey)], opts...)
 	var resp *recaptchaenterprisepb.Key
@@ -437,6 +443,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteKey[0:len((*c.CallOptions).DeleteKey):len((*c.CallOptions).DeleteKey)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -449,6 +456,7 @@
 
 func (c *gRPCClient) MigrateKey(ctx context.Context, req *recaptchaenterprisepb.MigrateKeyRequest, opts ...gax.CallOption) (*recaptchaenterprisepb.Key, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MigrateKey[0:len((*c.CallOptions).MigrateKey):len((*c.CallOptions).MigrateKey)], opts...)
 	var resp *recaptchaenterprisepb.Key
@@ -465,6 +473,7 @@
 
 func (c *gRPCClient) GetMetrics(ctx context.Context, req *recaptchaenterprisepb.GetMetricsRequest, opts ...gax.CallOption) (*recaptchaenterprisepb.Metrics, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMetrics[0:len((*c.CallOptions).GetMetrics):len((*c.CallOptions).GetMetrics)], opts...)
 	var resp *recaptchaenterprisepb.Metrics
@@ -481,6 +490,7 @@
 
 func (c *gRPCClient) ListRelatedAccountGroups(ctx context.Context, req *recaptchaenterprisepb.ListRelatedAccountGroupsRequest, opts ...gax.CallOption) *RelatedAccountGroupIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListRelatedAccountGroups[0:len((*c.CallOptions).ListRelatedAccountGroups):len((*c.CallOptions).ListRelatedAccountGroups)], opts...)
 	it := &RelatedAccountGroupIterator{}
@@ -525,6 +535,7 @@
 
 func (c *gRPCClient) ListRelatedAccountGroupMemberships(ctx context.Context, req *recaptchaenterprisepb.ListRelatedAccountGroupMembershipsRequest, opts ...gax.CallOption) *RelatedAccountGroupMembershipIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListRelatedAccountGroupMemberships[0:len((*c.CallOptions).ListRelatedAccountGroupMemberships):len((*c.CallOptions).ListRelatedAccountGroupMemberships)], opts...)
 	it := &RelatedAccountGroupMembershipIterator{}
@@ -569,6 +580,7 @@
 
 func (c *gRPCClient) SearchRelatedAccountGroupMemberships(ctx context.Context, req *recaptchaenterprisepb.SearchRelatedAccountGroupMembershipsRequest, opts ...gax.CallOption) *RelatedAccountGroupMembershipIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchRelatedAccountGroupMemberships[0:len((*c.CallOptions).SearchRelatedAccountGroupMemberships):len((*c.CallOptions).SearchRelatedAccountGroupMemberships)], opts...)
 	it := &RelatedAccountGroupMembershipIterator{}
diff --git a/recaptchaenterprise/apiv1/version.go b/recaptchaenterprise/apiv1/version.go
new file mode 100644
index 0000000..f7196bb
--- /dev/null
+++ b/recaptchaenterprise/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package recaptchaenterprise
+
+import "cloud.google.com/go/recaptchaenterprise/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/recaptchaenterprise/apiv1beta1/doc.go b/recaptchaenterprise/apiv1beta1/doc.go
index 2bcdf08..1f90b40 100644
--- a/recaptchaenterprise/apiv1beta1/doc.go
+++ b/recaptchaenterprise/apiv1beta1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/recaptchaenterprise/apiv1beta1/recaptcha_enterprise_service_v1_beta1_client.go b/recaptchaenterprise/apiv1beta1/recaptcha_enterprise_service_v1_beta1_client.go
index 321d2fd..422c532 100644
--- a/recaptchaenterprise/apiv1beta1/recaptcha_enterprise_service_v1_beta1_client.go
+++ b/recaptchaenterprise/apiv1beta1/recaptcha_enterprise_service_v1_beta1_client.go
@@ -225,7 +225,7 @@
 // use by Google-written clients.
 func (c *recaptchaEnterpriseServiceV1Beta1GRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -242,6 +242,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateAssessment[0:len((*c.CallOptions).CreateAssessment):len((*c.CallOptions).CreateAssessment)], opts...)
 	var resp *recaptchaenterprisepb.Assessment
@@ -263,6 +264,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AnnotateAssessment[0:len((*c.CallOptions).AnnotateAssessment):len((*c.CallOptions).AnnotateAssessment)], opts...)
 	var resp *recaptchaenterprisepb.AnnotateAssessmentResponse
@@ -284,6 +286,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateKey[0:len((*c.CallOptions).CreateKey):len((*c.CallOptions).CreateKey)], opts...)
 	var resp *recaptchaenterprisepb.Key
@@ -300,6 +303,7 @@
 
 func (c *recaptchaEnterpriseServiceV1Beta1GRPCClient) ListKeys(ctx context.Context, req *recaptchaenterprisepb.ListKeysRequest, opts ...gax.CallOption) *KeyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListKeys[0:len((*c.CallOptions).ListKeys):len((*c.CallOptions).ListKeys)], opts...)
 	it := &KeyIterator{}
@@ -349,6 +353,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetKey[0:len((*c.CallOptions).GetKey):len((*c.CallOptions).GetKey)], opts...)
 	var resp *recaptchaenterprisepb.Key
@@ -370,6 +375,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "key.name", url.QueryEscape(req.GetKey().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateKey[0:len((*c.CallOptions).UpdateKey):len((*c.CallOptions).UpdateKey)], opts...)
 	var resp *recaptchaenterprisepb.Key
@@ -391,6 +397,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteKey[0:len((*c.CallOptions).DeleteKey):len((*c.CallOptions).DeleteKey)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/recaptchaenterprise/apiv1beta1/version.go b/recaptchaenterprise/apiv1beta1/version.go
new file mode 100644
index 0000000..f7196bb
--- /dev/null
+++ b/recaptchaenterprise/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package recaptchaenterprise
+
+import "cloud.google.com/go/recaptchaenterprise/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/recommender/apiv1/doc.go b/recommender/apiv1/doc.go
index 8b1aec6..f10d8cc 100644
--- a/recommender/apiv1/doc.go
+++ b/recommender/apiv1/doc.go
@@ -88,7 +88,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/recommender/apiv1/recommender_client.go b/recommender/apiv1/recommender_client.go
index 863cdc6..e7b4d45 100644
--- a/recommender/apiv1/recommender_client.go
+++ b/recommender/apiv1/recommender_client.go
@@ -321,7 +321,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -333,6 +333,7 @@
 
 func (c *gRPCClient) ListInsights(ctx context.Context, req *recommenderpb.ListInsightsRequest, opts ...gax.CallOption) *InsightIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInsights[0:len((*c.CallOptions).ListInsights):len((*c.CallOptions).ListInsights)], opts...)
 	it := &InsightIterator{}
@@ -382,6 +383,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInsight[0:len((*c.CallOptions).GetInsight):len((*c.CallOptions).GetInsight)], opts...)
 	var resp *recommenderpb.Insight
@@ -403,6 +405,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MarkInsightAccepted[0:len((*c.CallOptions).MarkInsightAccepted):len((*c.CallOptions).MarkInsightAccepted)], opts...)
 	var resp *recommenderpb.Insight
@@ -419,6 +422,7 @@
 
 func (c *gRPCClient) ListRecommendations(ctx context.Context, req *recommenderpb.ListRecommendationsRequest, opts ...gax.CallOption) *RecommendationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListRecommendations[0:len((*c.CallOptions).ListRecommendations):len((*c.CallOptions).ListRecommendations)], opts...)
 	it := &RecommendationIterator{}
@@ -468,6 +472,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetRecommendation[0:len((*c.CallOptions).GetRecommendation):len((*c.CallOptions).GetRecommendation)], opts...)
 	var resp *recommenderpb.Recommendation
@@ -489,6 +494,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MarkRecommendationClaimed[0:len((*c.CallOptions).MarkRecommendationClaimed):len((*c.CallOptions).MarkRecommendationClaimed)], opts...)
 	var resp *recommenderpb.Recommendation
@@ -510,6 +516,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MarkRecommendationSucceeded[0:len((*c.CallOptions).MarkRecommendationSucceeded):len((*c.CallOptions).MarkRecommendationSucceeded)], opts...)
 	var resp *recommenderpb.Recommendation
@@ -531,6 +538,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MarkRecommendationFailed[0:len((*c.CallOptions).MarkRecommendationFailed):len((*c.CallOptions).MarkRecommendationFailed)], opts...)
 	var resp *recommenderpb.Recommendation
diff --git a/recommender/apiv1/version.go b/recommender/apiv1/version.go
new file mode 100644
index 0000000..3127cb8
--- /dev/null
+++ b/recommender/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package recommender
+
+import "cloud.google.com/go/recommender/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/recommender/apiv1beta1/doc.go b/recommender/apiv1beta1/doc.go
index 9f462e3..12fb63a 100644
--- a/recommender/apiv1beta1/doc.go
+++ b/recommender/apiv1beta1/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/recommender/apiv1beta1/recommender_client.go b/recommender/apiv1beta1/recommender_client.go
index 4b9d9da..aced782 100644
--- a/recommender/apiv1beta1/recommender_client.go
+++ b/recommender/apiv1beta1/recommender_client.go
@@ -357,7 +357,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -369,6 +369,7 @@
 
 func (c *gRPCClient) ListInsights(ctx context.Context, req *recommenderpb.ListInsightsRequest, opts ...gax.CallOption) *InsightIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInsights[0:len((*c.CallOptions).ListInsights):len((*c.CallOptions).ListInsights)], opts...)
 	it := &InsightIterator{}
@@ -418,6 +419,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInsight[0:len((*c.CallOptions).GetInsight):len((*c.CallOptions).GetInsight)], opts...)
 	var resp *recommenderpb.Insight
@@ -439,6 +441,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MarkInsightAccepted[0:len((*c.CallOptions).MarkInsightAccepted):len((*c.CallOptions).MarkInsightAccepted)], opts...)
 	var resp *recommenderpb.Insight
@@ -455,6 +458,7 @@
 
 func (c *gRPCClient) ListRecommendations(ctx context.Context, req *recommenderpb.ListRecommendationsRequest, opts ...gax.CallOption) *RecommendationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListRecommendations[0:len((*c.CallOptions).ListRecommendations):len((*c.CallOptions).ListRecommendations)], opts...)
 	it := &RecommendationIterator{}
@@ -504,6 +508,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetRecommendation[0:len((*c.CallOptions).GetRecommendation):len((*c.CallOptions).GetRecommendation)], opts...)
 	var resp *recommenderpb.Recommendation
@@ -525,6 +530,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MarkRecommendationClaimed[0:len((*c.CallOptions).MarkRecommendationClaimed):len((*c.CallOptions).MarkRecommendationClaimed)], opts...)
 	var resp *recommenderpb.Recommendation
@@ -546,6 +552,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MarkRecommendationSucceeded[0:len((*c.CallOptions).MarkRecommendationSucceeded):len((*c.CallOptions).MarkRecommendationSucceeded)], opts...)
 	var resp *recommenderpb.Recommendation
@@ -567,6 +574,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MarkRecommendationFailed[0:len((*c.CallOptions).MarkRecommendationFailed):len((*c.CallOptions).MarkRecommendationFailed)], opts...)
 	var resp *recommenderpb.Recommendation
@@ -583,6 +591,7 @@
 
 func (c *gRPCClient) GetRecommenderConfig(ctx context.Context, req *recommenderpb.GetRecommenderConfigRequest, opts ...gax.CallOption) (*recommenderpb.RecommenderConfig, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetRecommenderConfig[0:len((*c.CallOptions).GetRecommenderConfig):len((*c.CallOptions).GetRecommenderConfig)], opts...)
 	var resp *recommenderpb.RecommenderConfig
@@ -599,6 +608,7 @@
 
 func (c *gRPCClient) UpdateRecommenderConfig(ctx context.Context, req *recommenderpb.UpdateRecommenderConfigRequest, opts ...gax.CallOption) (*recommenderpb.RecommenderConfig, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "recommender_config.name", url.QueryEscape(req.GetRecommenderConfig().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateRecommenderConfig[0:len((*c.CallOptions).UpdateRecommenderConfig):len((*c.CallOptions).UpdateRecommenderConfig)], opts...)
 	var resp *recommenderpb.RecommenderConfig
@@ -615,6 +625,7 @@
 
 func (c *gRPCClient) GetInsightTypeConfig(ctx context.Context, req *recommenderpb.GetInsightTypeConfigRequest, opts ...gax.CallOption) (*recommenderpb.InsightTypeConfig, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInsightTypeConfig[0:len((*c.CallOptions).GetInsightTypeConfig):len((*c.CallOptions).GetInsightTypeConfig)], opts...)
 	var resp *recommenderpb.InsightTypeConfig
@@ -631,6 +642,7 @@
 
 func (c *gRPCClient) UpdateInsightTypeConfig(ctx context.Context, req *recommenderpb.UpdateInsightTypeConfigRequest, opts ...gax.CallOption) (*recommenderpb.InsightTypeConfig, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "insight_type_config.name", url.QueryEscape(req.GetInsightTypeConfig().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateInsightTypeConfig[0:len((*c.CallOptions).UpdateInsightTypeConfig):len((*c.CallOptions).UpdateInsightTypeConfig)], opts...)
 	var resp *recommenderpb.InsightTypeConfig
diff --git a/recommender/apiv1beta1/version.go b/recommender/apiv1beta1/version.go
new file mode 100644
index 0000000..3127cb8
--- /dev/null
+++ b/recommender/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package recommender
+
+import "cloud.google.com/go/recommender/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/redis/apiv1/cloud_redis_client.go b/redis/apiv1/cloud_redis_client.go
index 6eecd0c..1448392 100644
--- a/redis/apiv1/cloud_redis_client.go
+++ b/redis/apiv1/cloud_redis_client.go
@@ -389,7 +389,7 @@
 // use by Google-written clients.
 func (c *cloudRedisGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -401,6 +401,7 @@
 
 func (c *cloudRedisGRPCClient) ListInstances(ctx context.Context, req *redispb.ListInstancesRequest, opts ...gax.CallOption) *InstanceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInstances[0:len((*c.CallOptions).ListInstances):len((*c.CallOptions).ListInstances)], opts...)
 	it := &InstanceIterator{}
@@ -450,6 +451,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstance[0:len((*c.CallOptions).GetInstance):len((*c.CallOptions).GetInstance)], opts...)
 	var resp *redispb.Instance
@@ -471,6 +473,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateInstance[0:len((*c.CallOptions).CreateInstance):len((*c.CallOptions).CreateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -494,6 +497,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "instance.name", url.QueryEscape(req.GetInstance().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateInstance[0:len((*c.CallOptions).UpdateInstance):len((*c.CallOptions).UpdateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -517,6 +521,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpgradeInstance[0:len((*c.CallOptions).UpgradeInstance):len((*c.CallOptions).UpgradeInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -540,6 +545,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportInstance[0:len((*c.CallOptions).ImportInstance):len((*c.CallOptions).ImportInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -563,6 +569,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportInstance[0:len((*c.CallOptions).ExportInstance):len((*c.CallOptions).ExportInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -586,6 +593,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FailoverInstance[0:len((*c.CallOptions).FailoverInstance):len((*c.CallOptions).FailoverInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -609,6 +617,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteInstance[0:len((*c.CallOptions).DeleteInstance):len((*c.CallOptions).DeleteInstance)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/redis/apiv1/doc.go b/redis/apiv1/doc.go
index 245b8f7..4ab091e 100644
--- a/redis/apiv1/doc.go
+++ b/redis/apiv1/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/redis/apiv1/version.go b/redis/apiv1/version.go
new file mode 100644
index 0000000..74bcc1d
--- /dev/null
+++ b/redis/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package redis
+
+import "cloud.google.com/go/redis/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/redis/apiv1beta1/cloud_redis_client.go b/redis/apiv1beta1/cloud_redis_client.go
index c8d3360..f690da5 100644
--- a/redis/apiv1beta1/cloud_redis_client.go
+++ b/redis/apiv1beta1/cloud_redis_client.go
@@ -416,7 +416,7 @@
 // use by Google-written clients.
 func (c *cloudRedisGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -428,6 +428,7 @@
 
 func (c *cloudRedisGRPCClient) ListInstances(ctx context.Context, req *redispb.ListInstancesRequest, opts ...gax.CallOption) *InstanceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInstances[0:len((*c.CallOptions).ListInstances):len((*c.CallOptions).ListInstances)], opts...)
 	it := &InstanceIterator{}
@@ -477,6 +478,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstance[0:len((*c.CallOptions).GetInstance):len((*c.CallOptions).GetInstance)], opts...)
 	var resp *redispb.Instance
@@ -498,6 +500,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstanceAuthString[0:len((*c.CallOptions).GetInstanceAuthString):len((*c.CallOptions).GetInstanceAuthString)], opts...)
 	var resp *redispb.InstanceAuthString
@@ -519,6 +522,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateInstance[0:len((*c.CallOptions).CreateInstance):len((*c.CallOptions).CreateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -542,6 +546,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "instance.name", url.QueryEscape(req.GetInstance().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateInstance[0:len((*c.CallOptions).UpdateInstance):len((*c.CallOptions).UpdateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -565,6 +570,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpgradeInstance[0:len((*c.CallOptions).UpgradeInstance):len((*c.CallOptions).UpgradeInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -588,6 +594,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportInstance[0:len((*c.CallOptions).ImportInstance):len((*c.CallOptions).ImportInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -611,6 +618,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExportInstance[0:len((*c.CallOptions).ExportInstance):len((*c.CallOptions).ExportInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -634,6 +642,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FailoverInstance[0:len((*c.CallOptions).FailoverInstance):len((*c.CallOptions).FailoverInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -657,6 +666,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteInstance[0:len((*c.CallOptions).DeleteInstance):len((*c.CallOptions).DeleteInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -675,6 +685,7 @@
 
 func (c *cloudRedisGRPCClient) RescheduleMaintenance(ctx context.Context, req *redispb.RescheduleMaintenanceRequest, opts ...gax.CallOption) (*RescheduleMaintenanceOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RescheduleMaintenance[0:len((*c.CallOptions).RescheduleMaintenance):len((*c.CallOptions).RescheduleMaintenance)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/redis/apiv1beta1/doc.go b/redis/apiv1beta1/doc.go
index f399cff..2476425 100644
--- a/redis/apiv1beta1/doc.go
+++ b/redis/apiv1beta1/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/redis/apiv1beta1/version.go b/redis/apiv1beta1/version.go
new file mode 100644
index 0000000..74bcc1d
--- /dev/null
+++ b/redis/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package redis
+
+import "cloud.google.com/go/redis/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/resourcemanager/apiv2/doc.go b/resourcemanager/apiv2/doc.go
index e3502fa..d09dfed 100644
--- a/resourcemanager/apiv2/doc.go
+++ b/resourcemanager/apiv2/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/resourcemanager/apiv2/folders_client.go b/resourcemanager/apiv2/folders_client.go
index 59365a5..5d4a87e 100644
--- a/resourcemanager/apiv2/folders_client.go
+++ b/resourcemanager/apiv2/folders_client.go
@@ -401,7 +401,7 @@
 // use by Google-written clients.
 func (c *foldersGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -499,6 +499,7 @@
 
 func (c *foldersGRPCClient) GetFolder(ctx context.Context, req *resourcemanagerpb.GetFolderRequest, opts ...gax.CallOption) (*resourcemanagerpb.Folder, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFolder[0:len((*c.CallOptions).GetFolder):len((*c.CallOptions).GetFolder)], opts...)
 	var resp *resourcemanagerpb.Folder
@@ -532,6 +533,7 @@
 
 func (c *foldersGRPCClient) UpdateFolder(ctx context.Context, req *resourcemanagerpb.UpdateFolderRequest, opts ...gax.CallOption) (*resourcemanagerpb.Folder, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "folder.name", url.QueryEscape(req.GetFolder().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFolder[0:len((*c.CallOptions).UpdateFolder):len((*c.CallOptions).UpdateFolder)], opts...)
 	var resp *resourcemanagerpb.Folder
@@ -548,6 +550,7 @@
 
 func (c *foldersGRPCClient) MoveFolder(ctx context.Context, req *resourcemanagerpb.MoveFolderRequest, opts ...gax.CallOption) (*MoveFolderOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MoveFolder[0:len((*c.CallOptions).MoveFolder):len((*c.CallOptions).MoveFolder)], opts...)
 	var resp *longrunningpb.Operation
@@ -566,6 +569,7 @@
 
 func (c *foldersGRPCClient) DeleteFolder(ctx context.Context, req *resourcemanagerpb.DeleteFolderRequest, opts ...gax.CallOption) (*resourcemanagerpb.Folder, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteFolder[0:len((*c.CallOptions).DeleteFolder):len((*c.CallOptions).DeleteFolder)], opts...)
 	var resp *resourcemanagerpb.Folder
@@ -582,6 +586,7 @@
 
 func (c *foldersGRPCClient) UndeleteFolder(ctx context.Context, req *resourcemanagerpb.UndeleteFolderRequest, opts ...gax.CallOption) (*resourcemanagerpb.Folder, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UndeleteFolder[0:len((*c.CallOptions).UndeleteFolder):len((*c.CallOptions).UndeleteFolder)], opts...)
 	var resp *resourcemanagerpb.Folder
@@ -598,6 +603,7 @@
 
 func (c *foldersGRPCClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -614,6 +620,7 @@
 
 func (c *foldersGRPCClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -630,6 +637,7 @@
 
 func (c *foldersGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/resourcemanager/apiv2/version.go b/resourcemanager/apiv2/version.go
new file mode 100644
index 0000000..6012912
--- /dev/null
+++ b/resourcemanager/apiv2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package resourcemanager
+
+import "cloud.google.com/go/resourcemanager/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/resourcemanager/apiv3/doc.go b/resourcemanager/apiv3/doc.go
index 8fd7530..c6b97e5 100644
--- a/resourcemanager/apiv3/doc.go
+++ b/resourcemanager/apiv3/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/resourcemanager/apiv3/folders_client.go b/resourcemanager/apiv3/folders_client.go
index 62e02ad..acb1067 100644
--- a/resourcemanager/apiv3/folders_client.go
+++ b/resourcemanager/apiv3/folders_client.go
@@ -452,7 +452,7 @@
 // use by Google-written clients.
 func (c *foldersGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -469,6 +469,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFolder[0:len((*c.CallOptions).GetFolder):len((*c.CallOptions).GetFolder)], opts...)
 	var resp *resourcemanagerpb.Folder
@@ -598,6 +599,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "folder.name", url.QueryEscape(req.GetFolder().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFolder[0:len((*c.CallOptions).UpdateFolder):len((*c.CallOptions).UpdateFolder)], opts...)
 	var resp *longrunningpb.Operation
@@ -621,6 +623,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MoveFolder[0:len((*c.CallOptions).MoveFolder):len((*c.CallOptions).MoveFolder)], opts...)
 	var resp *longrunningpb.Operation
@@ -644,6 +647,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteFolder[0:len((*c.CallOptions).DeleteFolder):len((*c.CallOptions).DeleteFolder)], opts...)
 	var resp *longrunningpb.Operation
@@ -667,6 +671,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UndeleteFolder[0:len((*c.CallOptions).UndeleteFolder):len((*c.CallOptions).UndeleteFolder)], opts...)
 	var resp *longrunningpb.Operation
@@ -690,6 +695,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -711,6 +717,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -727,6 +734,7 @@
 
 func (c *foldersGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/resourcemanager/apiv3/organizations_client.go b/resourcemanager/apiv3/organizations_client.go
index 6c13634..63e7602 100644
--- a/resourcemanager/apiv3/organizations_client.go
+++ b/resourcemanager/apiv3/organizations_client.go
@@ -250,7 +250,7 @@
 // use by Google-written clients.
 func (c *organizationsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -267,6 +267,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetOrganization[0:len((*c.CallOptions).GetOrganization):len((*c.CallOptions).GetOrganization)], opts...)
 	var resp *resourcemanagerpb.Organization
@@ -331,6 +332,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -352,6 +354,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -368,6 +371,7 @@
 
 func (c *organizationsGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/resourcemanager/apiv3/projects_client.go b/resourcemanager/apiv3/projects_client.go
index 4ace58c..c1949ae 100644
--- a/resourcemanager/apiv3/projects_client.go
+++ b/resourcemanager/apiv3/projects_client.go
@@ -467,7 +467,7 @@
 // use by Google-written clients.
 func (c *projectsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -484,6 +484,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetProject[0:len((*c.CallOptions).GetProject):len((*c.CallOptions).GetProject)], opts...)
 	var resp *resourcemanagerpb.Project
@@ -613,6 +614,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project.name", url.QueryEscape(req.GetProject().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateProject[0:len((*c.CallOptions).UpdateProject):len((*c.CallOptions).UpdateProject)], opts...)
 	var resp *longrunningpb.Operation
@@ -636,6 +638,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).MoveProject[0:len((*c.CallOptions).MoveProject):len((*c.CallOptions).MoveProject)], opts...)
 	var resp *longrunningpb.Operation
@@ -659,6 +662,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteProject[0:len((*c.CallOptions).DeleteProject):len((*c.CallOptions).DeleteProject)], opts...)
 	var resp *longrunningpb.Operation
@@ -682,6 +686,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UndeleteProject[0:len((*c.CallOptions).UndeleteProject):len((*c.CallOptions).UndeleteProject)], opts...)
 	var resp *longrunningpb.Operation
@@ -705,6 +710,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -726,6 +732,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -742,6 +749,7 @@
 
 func (c *projectsGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/resourcemanager/apiv3/tag_bindings_client.go b/resourcemanager/apiv3/tag_bindings_client.go
index 6b27b0a..afd3def 100644
--- a/resourcemanager/apiv3/tag_bindings_client.go
+++ b/resourcemanager/apiv3/tag_bindings_client.go
@@ -248,7 +248,7 @@
 // use by Google-written clients.
 func (c *tagBindingsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -330,6 +330,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTagBinding[0:len((*c.CallOptions).DeleteTagBinding):len((*c.CallOptions).DeleteTagBinding)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/resourcemanager/apiv3/tag_keys_client.go b/resourcemanager/apiv3/tag_keys_client.go
index 8b7aa57..19a50bf 100644
--- a/resourcemanager/apiv3/tag_keys_client.go
+++ b/resourcemanager/apiv3/tag_keys_client.go
@@ -327,7 +327,7 @@
 // use by Google-written clients.
 func (c *tagKeysGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -387,6 +387,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTagKey[0:len((*c.CallOptions).GetTagKey):len((*c.CallOptions).GetTagKey)], opts...)
 	var resp *resourcemanagerpb.TagKey
@@ -430,6 +431,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tag_key.name", url.QueryEscape(req.GetTagKey().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTagKey[0:len((*c.CallOptions).UpdateTagKey):len((*c.CallOptions).UpdateTagKey)], opts...)
 	var resp *longrunningpb.Operation
@@ -453,6 +455,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTagKey[0:len((*c.CallOptions).DeleteTagKey):len((*c.CallOptions).DeleteTagKey)], opts...)
 	var resp *longrunningpb.Operation
@@ -476,6 +479,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -497,6 +501,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -513,6 +518,7 @@
 
 func (c *tagKeysGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/resourcemanager/apiv3/tag_values_client.go b/resourcemanager/apiv3/tag_values_client.go
index 43b5927..dbae751 100644
--- a/resourcemanager/apiv3/tag_values_client.go
+++ b/resourcemanager/apiv3/tag_values_client.go
@@ -328,7 +328,7 @@
 // use by Google-written clients.
 func (c *tagValuesGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -388,6 +388,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTagValue[0:len((*c.CallOptions).GetTagValue):len((*c.CallOptions).GetTagValue)], opts...)
 	var resp *resourcemanagerpb.TagValue
@@ -431,6 +432,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tag_value.name", url.QueryEscape(req.GetTagValue().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTagValue[0:len((*c.CallOptions).UpdateTagValue):len((*c.CallOptions).UpdateTagValue)], opts...)
 	var resp *longrunningpb.Operation
@@ -454,6 +456,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTagValue[0:len((*c.CallOptions).DeleteTagValue):len((*c.CallOptions).DeleteTagValue)], opts...)
 	var resp *longrunningpb.Operation
@@ -477,6 +480,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -498,6 +502,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -514,6 +519,7 @@
 
 func (c *tagValuesGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/resourcemanager/apiv3/version.go b/resourcemanager/apiv3/version.go
new file mode 100644
index 0000000..6012912
--- /dev/null
+++ b/resourcemanager/apiv3/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package resourcemanager
+
+import "cloud.google.com/go/resourcemanager/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/resourcesettings/apiv1/doc.go b/resourcesettings/apiv1/doc.go
index 0a13fac..e29b749 100644
--- a/resourcesettings/apiv1/doc.go
+++ b/resourcesettings/apiv1/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/resourcesettings/apiv1/resource_settings_client.go b/resourcesettings/apiv1/resource_settings_client.go
index 53c4a18..258b888 100644
--- a/resourcesettings/apiv1/resource_settings_client.go
+++ b/resourcesettings/apiv1/resource_settings_client.go
@@ -266,7 +266,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -278,6 +278,7 @@
 
 func (c *gRPCClient) ListSettings(ctx context.Context, req *resourcesettingspb.ListSettingsRequest, opts ...gax.CallOption) *SettingIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSettings[0:len((*c.CallOptions).ListSettings):len((*c.CallOptions).ListSettings)], opts...)
 	it := &SettingIterator{}
@@ -327,6 +328,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSetting[0:len((*c.CallOptions).GetSetting):len((*c.CallOptions).GetSetting)], opts...)
 	var resp *resourcesettingspb.Setting
@@ -348,6 +350,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "setting.name", url.QueryEscape(req.GetSetting().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSetting[0:len((*c.CallOptions).UpdateSetting):len((*c.CallOptions).UpdateSetting)], opts...)
 	var resp *resourcesettingspb.Setting
diff --git a/resourcesettings/apiv1/version.go b/resourcesettings/apiv1/version.go
new file mode 100644
index 0000000..ba942c9
--- /dev/null
+++ b/resourcesettings/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package resourcesettings
+
+import "cloud.google.com/go/resourcesettings/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/retail/apiv2/catalog_client.go b/retail/apiv2/catalog_client.go
index 8bd3288..5e8bb99 100644
--- a/retail/apiv2/catalog_client.go
+++ b/retail/apiv2/catalog_client.go
@@ -290,7 +290,7 @@
 // use by Google-written clients.
 func (c *catalogGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -302,6 +302,7 @@
 
 func (c *catalogGRPCClient) ListCatalogs(ctx context.Context, req *retailpb.ListCatalogsRequest, opts ...gax.CallOption) *CatalogIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCatalogs[0:len((*c.CallOptions).ListCatalogs):len((*c.CallOptions).ListCatalogs)], opts...)
 	it := &CatalogIterator{}
@@ -351,6 +352,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "catalog.name", url.QueryEscape(req.GetCatalog().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCatalog[0:len((*c.CallOptions).UpdateCatalog):len((*c.CallOptions).UpdateCatalog)], opts...)
 	var resp *retailpb.Catalog
@@ -372,6 +374,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "catalog", url.QueryEscape(req.GetCatalog())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetDefaultBranch[0:len((*c.CallOptions).SetDefaultBranch):len((*c.CallOptions).SetDefaultBranch)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -389,6 +392,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "catalog", url.QueryEscape(req.GetCatalog())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDefaultBranch[0:len((*c.CallOptions).GetDefaultBranch):len((*c.CallOptions).GetDefaultBranch)], opts...)
 	var resp *retailpb.GetDefaultBranchResponse
diff --git a/retail/apiv2/completion_client.go b/retail/apiv2/completion_client.go
index d55be1a..4d1299d 100644
--- a/retail/apiv2/completion_client.go
+++ b/retail/apiv2/completion_client.go
@@ -254,7 +254,7 @@
 // use by Google-written clients.
 func (c *completionGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -271,6 +271,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "catalog", url.QueryEscape(req.GetCatalog())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CompleteQuery[0:len((*c.CallOptions).CompleteQuery):len((*c.CallOptions).CompleteQuery)], opts...)
 	var resp *retailpb.CompleteQueryResponse
@@ -292,6 +293,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportCompletionData[0:len((*c.CallOptions).ImportCompletionData):len((*c.CallOptions).ImportCompletionData)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/retail/apiv2/doc.go b/retail/apiv2/doc.go
index 87a6eb8..6971f25 100644
--- a/retail/apiv2/doc.go
+++ b/retail/apiv2/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/retail/apiv2/prediction_client.go b/retail/apiv2/prediction_client.go
index 8c3da5e..458d045 100644
--- a/retail/apiv2/prediction_client.go
+++ b/retail/apiv2/prediction_client.go
@@ -186,7 +186,7 @@
 // use by Google-written clients.
 func (c *predictionGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -203,6 +203,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "placement", url.QueryEscape(req.GetPlacement())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Predict[0:len((*c.CallOptions).Predict):len((*c.CallOptions).Predict)], opts...)
 	var resp *retailpb.PredictResponse
diff --git a/retail/apiv2/product_client.go b/retail/apiv2/product_client.go
index e557d2f..302e64c 100644
--- a/retail/apiv2/product_client.go
+++ b/retail/apiv2/product_client.go
@@ -467,7 +467,7 @@
 // use by Google-written clients.
 func (c *productGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -484,6 +484,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateProduct[0:len((*c.CallOptions).CreateProduct):len((*c.CallOptions).CreateProduct)], opts...)
 	var resp *retailpb.Product
@@ -505,6 +506,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetProduct[0:len((*c.CallOptions).GetProduct):len((*c.CallOptions).GetProduct)], opts...)
 	var resp *retailpb.Product
@@ -521,6 +523,7 @@
 
 func (c *productGRPCClient) ListProducts(ctx context.Context, req *retailpb.ListProductsRequest, opts ...gax.CallOption) *ProductIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListProducts[0:len((*c.CallOptions).ListProducts):len((*c.CallOptions).ListProducts)], opts...)
 	it := &ProductIterator{}
@@ -570,6 +573,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "product.name", url.QueryEscape(req.GetProduct().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateProduct[0:len((*c.CallOptions).UpdateProduct):len((*c.CallOptions).UpdateProduct)], opts...)
 	var resp *retailpb.Product
@@ -591,6 +595,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteProduct[0:len((*c.CallOptions).DeleteProduct):len((*c.CallOptions).DeleteProduct)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -608,6 +613,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportProducts[0:len((*c.CallOptions).ImportProducts):len((*c.CallOptions).ImportProducts)], opts...)
 	var resp *longrunningpb.Operation
@@ -631,6 +637,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "inventory.name", url.QueryEscape(req.GetInventory().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetInventory[0:len((*c.CallOptions).SetInventory):len((*c.CallOptions).SetInventory)], opts...)
 	var resp *longrunningpb.Operation
@@ -654,6 +661,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "product", url.QueryEscape(req.GetProduct())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AddFulfillmentPlaces[0:len((*c.CallOptions).AddFulfillmentPlaces):len((*c.CallOptions).AddFulfillmentPlaces)], opts...)
 	var resp *longrunningpb.Operation
@@ -677,6 +685,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "product", url.QueryEscape(req.GetProduct())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RemoveFulfillmentPlaces[0:len((*c.CallOptions).RemoveFulfillmentPlaces):len((*c.CallOptions).RemoveFulfillmentPlaces)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/retail/apiv2/search_client.go b/retail/apiv2/search_client.go
index 0c62bab..ff59702 100644
--- a/retail/apiv2/search_client.go
+++ b/retail/apiv2/search_client.go
@@ -200,7 +200,7 @@
 // use by Google-written clients.
 func (c *searchGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -212,6 +212,7 @@
 
 func (c *searchGRPCClient) Search(ctx context.Context, req *retailpb.SearchRequest, opts ...gax.CallOption) *SearchResponse_SearchResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "placement", url.QueryEscape(req.GetPlacement())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Search[0:len((*c.CallOptions).Search):len((*c.CallOptions).Search)], opts...)
 	it := &SearchResponse_SearchResultIterator{}
diff --git a/retail/apiv2/user_event_client.go b/retail/apiv2/user_event_client.go
index 6ee2424..cdeafe5 100644
--- a/retail/apiv2/user_event_client.go
+++ b/retail/apiv2/user_event_client.go
@@ -327,7 +327,7 @@
 // use by Google-written clients.
 func (c *userEventGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -344,6 +344,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).WriteUserEvent[0:len((*c.CallOptions).WriteUserEvent):len((*c.CallOptions).WriteUserEvent)], opts...)
 	var resp *retailpb.UserEvent
@@ -365,6 +366,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CollectUserEvent[0:len((*c.CallOptions).CollectUserEvent):len((*c.CallOptions).CollectUserEvent)], opts...)
 	var resp *httpbodypb.HttpBody
@@ -386,6 +388,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PurgeUserEvents[0:len((*c.CallOptions).PurgeUserEvents):len((*c.CallOptions).PurgeUserEvents)], opts...)
 	var resp *longrunningpb.Operation
@@ -409,6 +412,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportUserEvents[0:len((*c.CallOptions).ImportUserEvents):len((*c.CallOptions).ImportUserEvents)], opts...)
 	var resp *longrunningpb.Operation
@@ -432,6 +436,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RejoinUserEvents[0:len((*c.CallOptions).RejoinUserEvents):len((*c.CallOptions).RejoinUserEvents)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/retail/apiv2/version.go b/retail/apiv2/version.go
new file mode 100644
index 0000000..a89d573
--- /dev/null
+++ b/retail/apiv2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package retail
+
+import "cloud.google.com/go/retail/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/scheduler/apiv1/cloud_scheduler_client.go b/scheduler/apiv1/cloud_scheduler_client.go
index b667ca5..95a1149 100644
--- a/scheduler/apiv1/cloud_scheduler_client.go
+++ b/scheduler/apiv1/cloud_scheduler_client.go
@@ -290,7 +290,7 @@
 // use by Google-written clients.
 func (c *cloudSchedulerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -302,6 +302,7 @@
 
 func (c *cloudSchedulerGRPCClient) ListJobs(ctx context.Context, req *schedulerpb.ListJobsRequest, opts ...gax.CallOption) *JobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListJobs[0:len((*c.CallOptions).ListJobs):len((*c.CallOptions).ListJobs)], opts...)
 	it := &JobIterator{}
@@ -351,6 +352,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJob[0:len((*c.CallOptions).GetJob):len((*c.CallOptions).GetJob)], opts...)
 	var resp *schedulerpb.Job
@@ -372,6 +374,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateJob[0:len((*c.CallOptions).CreateJob):len((*c.CallOptions).CreateJob)], opts...)
 	var resp *schedulerpb.Job
@@ -393,6 +396,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "job.name", url.QueryEscape(req.GetJob().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateJob[0:len((*c.CallOptions).UpdateJob):len((*c.CallOptions).UpdateJob)], opts...)
 	var resp *schedulerpb.Job
@@ -414,6 +418,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteJob[0:len((*c.CallOptions).DeleteJob):len((*c.CallOptions).DeleteJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -431,6 +436,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PauseJob[0:len((*c.CallOptions).PauseJob):len((*c.CallOptions).PauseJob)], opts...)
 	var resp *schedulerpb.Job
@@ -452,6 +458,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResumeJob[0:len((*c.CallOptions).ResumeJob):len((*c.CallOptions).ResumeJob)], opts...)
 	var resp *schedulerpb.Job
@@ -473,6 +480,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunJob[0:len((*c.CallOptions).RunJob):len((*c.CallOptions).RunJob)], opts...)
 	var resp *schedulerpb.Job
diff --git a/scheduler/apiv1/doc.go b/scheduler/apiv1/doc.go
index 9681160..11fccd4 100644
--- a/scheduler/apiv1/doc.go
+++ b/scheduler/apiv1/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/scheduler/apiv1/version.go b/scheduler/apiv1/version.go
new file mode 100644
index 0000000..523737a
--- /dev/null
+++ b/scheduler/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package scheduler
+
+import "cloud.google.com/go/scheduler/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/scheduler/apiv1beta1/cloud_scheduler_client.go b/scheduler/apiv1beta1/cloud_scheduler_client.go
index b56c813..f4cecae 100644
--- a/scheduler/apiv1beta1/cloud_scheduler_client.go
+++ b/scheduler/apiv1beta1/cloud_scheduler_client.go
@@ -312,7 +312,7 @@
 // use by Google-written clients.
 func (c *cloudSchedulerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -324,6 +324,7 @@
 
 func (c *cloudSchedulerGRPCClient) ListJobs(ctx context.Context, req *schedulerpb.ListJobsRequest, opts ...gax.CallOption) *JobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListJobs[0:len((*c.CallOptions).ListJobs):len((*c.CallOptions).ListJobs)], opts...)
 	it := &JobIterator{}
@@ -373,6 +374,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJob[0:len((*c.CallOptions).GetJob):len((*c.CallOptions).GetJob)], opts...)
 	var resp *schedulerpb.Job
@@ -394,6 +396,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateJob[0:len((*c.CallOptions).CreateJob):len((*c.CallOptions).CreateJob)], opts...)
 	var resp *schedulerpb.Job
@@ -415,6 +418,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "job.name", url.QueryEscape(req.GetJob().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateJob[0:len((*c.CallOptions).UpdateJob):len((*c.CallOptions).UpdateJob)], opts...)
 	var resp *schedulerpb.Job
@@ -436,6 +440,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteJob[0:len((*c.CallOptions).DeleteJob):len((*c.CallOptions).DeleteJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -453,6 +458,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PauseJob[0:len((*c.CallOptions).PauseJob):len((*c.CallOptions).PauseJob)], opts...)
 	var resp *schedulerpb.Job
@@ -474,6 +480,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResumeJob[0:len((*c.CallOptions).ResumeJob):len((*c.CallOptions).ResumeJob)], opts...)
 	var resp *schedulerpb.Job
@@ -495,6 +502,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunJob[0:len((*c.CallOptions).RunJob):len((*c.CallOptions).RunJob)], opts...)
 	var resp *schedulerpb.Job
diff --git a/scheduler/apiv1beta1/doc.go b/scheduler/apiv1beta1/doc.go
index 3945d2c..3afabab 100644
--- a/scheduler/apiv1beta1/doc.go
+++ b/scheduler/apiv1beta1/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/scheduler/apiv1beta1/version.go b/scheduler/apiv1beta1/version.go
new file mode 100644
index 0000000..523737a
--- /dev/null
+++ b/scheduler/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package scheduler
+
+import "cloud.google.com/go/scheduler/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/secretmanager/apiv1/doc.go b/secretmanager/apiv1/doc.go
index cfc86ed..6c4b3de 100644
--- a/secretmanager/apiv1/doc.go
+++ b/secretmanager/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/secretmanager/apiv1/secret_manager_client.go b/secretmanager/apiv1/secret_manager_client.go
index ed594fc..4f15a6d 100644
--- a/secretmanager/apiv1/secret_manager_client.go
+++ b/secretmanager/apiv1/secret_manager_client.go
@@ -344,7 +344,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -356,6 +356,7 @@
 
 func (c *gRPCClient) ListSecrets(ctx context.Context, req *secretmanagerpb.ListSecretsRequest, opts ...gax.CallOption) *SecretIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSecrets[0:len((*c.CallOptions).ListSecrets):len((*c.CallOptions).ListSecrets)], opts...)
 	it := &SecretIterator{}
@@ -405,6 +406,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSecret[0:len((*c.CallOptions).CreateSecret):len((*c.CallOptions).CreateSecret)], opts...)
 	var resp *secretmanagerpb.Secret
@@ -426,6 +428,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AddSecretVersion[0:len((*c.CallOptions).AddSecretVersion):len((*c.CallOptions).AddSecretVersion)], opts...)
 	var resp *secretmanagerpb.SecretVersion
@@ -447,6 +450,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSecret[0:len((*c.CallOptions).GetSecret):len((*c.CallOptions).GetSecret)], opts...)
 	var resp *secretmanagerpb.Secret
@@ -468,6 +472,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "secret.name", url.QueryEscape(req.GetSecret().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSecret[0:len((*c.CallOptions).UpdateSecret):len((*c.CallOptions).UpdateSecret)], opts...)
 	var resp *secretmanagerpb.Secret
@@ -489,6 +494,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSecret[0:len((*c.CallOptions).DeleteSecret):len((*c.CallOptions).DeleteSecret)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -501,6 +507,7 @@
 
 func (c *gRPCClient) ListSecretVersions(ctx context.Context, req *secretmanagerpb.ListSecretVersionsRequest, opts ...gax.CallOption) *SecretVersionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSecretVersions[0:len((*c.CallOptions).ListSecretVersions):len((*c.CallOptions).ListSecretVersions)], opts...)
 	it := &SecretVersionIterator{}
@@ -550,6 +557,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSecretVersion[0:len((*c.CallOptions).GetSecretVersion):len((*c.CallOptions).GetSecretVersion)], opts...)
 	var resp *secretmanagerpb.SecretVersion
@@ -571,6 +579,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AccessSecretVersion[0:len((*c.CallOptions).AccessSecretVersion):len((*c.CallOptions).AccessSecretVersion)], opts...)
 	var resp *secretmanagerpb.AccessSecretVersionResponse
@@ -592,6 +601,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DisableSecretVersion[0:len((*c.CallOptions).DisableSecretVersion):len((*c.CallOptions).DisableSecretVersion)], opts...)
 	var resp *secretmanagerpb.SecretVersion
@@ -613,6 +623,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).EnableSecretVersion[0:len((*c.CallOptions).EnableSecretVersion):len((*c.CallOptions).EnableSecretVersion)], opts...)
 	var resp *secretmanagerpb.SecretVersion
@@ -634,6 +645,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DestroySecretVersion[0:len((*c.CallOptions).DestroySecretVersion):len((*c.CallOptions).DestroySecretVersion)], opts...)
 	var resp *secretmanagerpb.SecretVersion
@@ -655,6 +667,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -676,6 +689,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -697,6 +711,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/secretmanager/apiv1/version.go b/secretmanager/apiv1/version.go
new file mode 100644
index 0000000..bac9ad4
--- /dev/null
+++ b/secretmanager/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package secretmanager
+
+import "cloud.google.com/go/secretmanager/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/secretmanager/apiv1beta1/doc.go b/secretmanager/apiv1beta1/doc.go
index ead68a0..bb8f644 100644
--- a/secretmanager/apiv1beta1/doc.go
+++ b/secretmanager/apiv1beta1/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/secretmanager/apiv1beta1/secret_manager_client.go b/secretmanager/apiv1beta1/secret_manager_client.go
index 9136ed5..69ac59a 100644
--- a/secretmanager/apiv1beta1/secret_manager_client.go
+++ b/secretmanager/apiv1beta1/secret_manager_client.go
@@ -344,7 +344,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -356,6 +356,7 @@
 
 func (c *gRPCClient) ListSecrets(ctx context.Context, req *secretmanagerpb.ListSecretsRequest, opts ...gax.CallOption) *SecretIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSecrets[0:len((*c.CallOptions).ListSecrets):len((*c.CallOptions).ListSecrets)], opts...)
 	it := &SecretIterator{}
@@ -405,6 +406,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSecret[0:len((*c.CallOptions).CreateSecret):len((*c.CallOptions).CreateSecret)], opts...)
 	var resp *secretmanagerpb.Secret
@@ -426,6 +428,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AddSecretVersion[0:len((*c.CallOptions).AddSecretVersion):len((*c.CallOptions).AddSecretVersion)], opts...)
 	var resp *secretmanagerpb.SecretVersion
@@ -447,6 +450,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSecret[0:len((*c.CallOptions).GetSecret):len((*c.CallOptions).GetSecret)], opts...)
 	var resp *secretmanagerpb.Secret
@@ -468,6 +472,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "secret.name", url.QueryEscape(req.GetSecret().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSecret[0:len((*c.CallOptions).UpdateSecret):len((*c.CallOptions).UpdateSecret)], opts...)
 	var resp *secretmanagerpb.Secret
@@ -489,6 +494,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSecret[0:len((*c.CallOptions).DeleteSecret):len((*c.CallOptions).DeleteSecret)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -501,6 +507,7 @@
 
 func (c *gRPCClient) ListSecretVersions(ctx context.Context, req *secretmanagerpb.ListSecretVersionsRequest, opts ...gax.CallOption) *SecretVersionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSecretVersions[0:len((*c.CallOptions).ListSecretVersions):len((*c.CallOptions).ListSecretVersions)], opts...)
 	it := &SecretVersionIterator{}
@@ -550,6 +557,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSecretVersion[0:len((*c.CallOptions).GetSecretVersion):len((*c.CallOptions).GetSecretVersion)], opts...)
 	var resp *secretmanagerpb.SecretVersion
@@ -571,6 +579,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AccessSecretVersion[0:len((*c.CallOptions).AccessSecretVersion):len((*c.CallOptions).AccessSecretVersion)], opts...)
 	var resp *secretmanagerpb.AccessSecretVersionResponse
@@ -592,6 +601,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DisableSecretVersion[0:len((*c.CallOptions).DisableSecretVersion):len((*c.CallOptions).DisableSecretVersion)], opts...)
 	var resp *secretmanagerpb.SecretVersion
@@ -613,6 +623,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).EnableSecretVersion[0:len((*c.CallOptions).EnableSecretVersion):len((*c.CallOptions).EnableSecretVersion)], opts...)
 	var resp *secretmanagerpb.SecretVersion
@@ -634,6 +645,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DestroySecretVersion[0:len((*c.CallOptions).DestroySecretVersion):len((*c.CallOptions).DestroySecretVersion)], opts...)
 	var resp *secretmanagerpb.SecretVersion
@@ -655,6 +667,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -676,6 +689,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -697,6 +711,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/secretmanager/apiv1beta1/version.go b/secretmanager/apiv1beta1/version.go
new file mode 100644
index 0000000..bac9ad4
--- /dev/null
+++ b/secretmanager/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package secretmanager
+
+import "cloud.google.com/go/secretmanager/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/security/privateca/apiv1/certificate_authority_client.go b/security/privateca/apiv1/certificate_authority_client.go
index b0be0c0..3808b86 100644
--- a/security/privateca/apiv1/certificate_authority_client.go
+++ b/security/privateca/apiv1/certificate_authority_client.go
@@ -947,7 +947,7 @@
 // use by Google-written clients.
 func (c *certificateAuthorityGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -964,6 +964,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCertificate[0:len((*c.CallOptions).CreateCertificate):len((*c.CallOptions).CreateCertificate)], opts...)
 	var resp *privatecapb.Certificate
@@ -985,6 +986,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCertificate[0:len((*c.CallOptions).GetCertificate):len((*c.CallOptions).GetCertificate)], opts...)
 	var resp *privatecapb.Certificate
@@ -1001,6 +1003,7 @@
 
 func (c *certificateAuthorityGRPCClient) ListCertificates(ctx context.Context, req *privatecapb.ListCertificatesRequest, opts ...gax.CallOption) *CertificateIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCertificates[0:len((*c.CallOptions).ListCertificates):len((*c.CallOptions).ListCertificates)], opts...)
 	it := &CertificateIterator{}
@@ -1050,6 +1053,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RevokeCertificate[0:len((*c.CallOptions).RevokeCertificate):len((*c.CallOptions).RevokeCertificate)], opts...)
 	var resp *privatecapb.Certificate
@@ -1071,6 +1075,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "certificate.name", url.QueryEscape(req.GetCertificate().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCertificate[0:len((*c.CallOptions).UpdateCertificate):len((*c.CallOptions).UpdateCertificate)], opts...)
 	var resp *privatecapb.Certificate
@@ -1092,6 +1097,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ActivateCertificateAuthority[0:len((*c.CallOptions).ActivateCertificateAuthority):len((*c.CallOptions).ActivateCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -1115,6 +1121,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCertificateAuthority[0:len((*c.CallOptions).CreateCertificateAuthority):len((*c.CallOptions).CreateCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -1138,6 +1145,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DisableCertificateAuthority[0:len((*c.CallOptions).DisableCertificateAuthority):len((*c.CallOptions).DisableCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -1161,6 +1169,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).EnableCertificateAuthority[0:len((*c.CallOptions).EnableCertificateAuthority):len((*c.CallOptions).EnableCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -1184,6 +1193,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FetchCertificateAuthorityCsr[0:len((*c.CallOptions).FetchCertificateAuthorityCsr):len((*c.CallOptions).FetchCertificateAuthorityCsr)], opts...)
 	var resp *privatecapb.FetchCertificateAuthorityCsrResponse
@@ -1205,6 +1215,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCertificateAuthority[0:len((*c.CallOptions).GetCertificateAuthority):len((*c.CallOptions).GetCertificateAuthority)], opts...)
 	var resp *privatecapb.CertificateAuthority
@@ -1221,6 +1232,7 @@
 
 func (c *certificateAuthorityGRPCClient) ListCertificateAuthorities(ctx context.Context, req *privatecapb.ListCertificateAuthoritiesRequest, opts ...gax.CallOption) *CertificateAuthorityIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCertificateAuthorities[0:len((*c.CallOptions).ListCertificateAuthorities):len((*c.CallOptions).ListCertificateAuthorities)], opts...)
 	it := &CertificateAuthorityIterator{}
@@ -1270,6 +1282,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UndeleteCertificateAuthority[0:len((*c.CallOptions).UndeleteCertificateAuthority):len((*c.CallOptions).UndeleteCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -1293,6 +1306,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteCertificateAuthority[0:len((*c.CallOptions).DeleteCertificateAuthority):len((*c.CallOptions).DeleteCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -1316,6 +1330,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "certificate_authority.name", url.QueryEscape(req.GetCertificateAuthority().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCertificateAuthority[0:len((*c.CallOptions).UpdateCertificateAuthority):len((*c.CallOptions).UpdateCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -1339,6 +1354,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCaPool[0:len((*c.CallOptions).CreateCaPool):len((*c.CallOptions).CreateCaPool)], opts...)
 	var resp *longrunningpb.Operation
@@ -1362,6 +1378,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "ca_pool.name", url.QueryEscape(req.GetCaPool().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCaPool[0:len((*c.CallOptions).UpdateCaPool):len((*c.CallOptions).UpdateCaPool)], opts...)
 	var resp *longrunningpb.Operation
@@ -1385,6 +1402,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCaPool[0:len((*c.CallOptions).GetCaPool):len((*c.CallOptions).GetCaPool)], opts...)
 	var resp *privatecapb.CaPool
@@ -1401,6 +1419,7 @@
 
 func (c *certificateAuthorityGRPCClient) ListCaPools(ctx context.Context, req *privatecapb.ListCaPoolsRequest, opts ...gax.CallOption) *CaPoolIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCaPools[0:len((*c.CallOptions).ListCaPools):len((*c.CallOptions).ListCaPools)], opts...)
 	it := &CaPoolIterator{}
@@ -1450,6 +1469,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteCaPool[0:len((*c.CallOptions).DeleteCaPool):len((*c.CallOptions).DeleteCaPool)], opts...)
 	var resp *longrunningpb.Operation
@@ -1473,6 +1493,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "ca_pool", url.QueryEscape(req.GetCaPool())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FetchCaCerts[0:len((*c.CallOptions).FetchCaCerts):len((*c.CallOptions).FetchCaCerts)], opts...)
 	var resp *privatecapb.FetchCaCertsResponse
@@ -1494,6 +1515,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCertificateRevocationList[0:len((*c.CallOptions).GetCertificateRevocationList):len((*c.CallOptions).GetCertificateRevocationList)], opts...)
 	var resp *privatecapb.CertificateRevocationList
@@ -1510,6 +1532,7 @@
 
 func (c *certificateAuthorityGRPCClient) ListCertificateRevocationLists(ctx context.Context, req *privatecapb.ListCertificateRevocationListsRequest, opts ...gax.CallOption) *CertificateRevocationListIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCertificateRevocationLists[0:len((*c.CallOptions).ListCertificateRevocationLists):len((*c.CallOptions).ListCertificateRevocationLists)], opts...)
 	it := &CertificateRevocationListIterator{}
@@ -1559,6 +1582,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "certificate_revocation_list.name", url.QueryEscape(req.GetCertificateRevocationList().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCertificateRevocationList[0:len((*c.CallOptions).UpdateCertificateRevocationList):len((*c.CallOptions).UpdateCertificateRevocationList)], opts...)
 	var resp *longrunningpb.Operation
@@ -1582,6 +1606,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCertificateTemplate[0:len((*c.CallOptions).CreateCertificateTemplate):len((*c.CallOptions).CreateCertificateTemplate)], opts...)
 	var resp *longrunningpb.Operation
@@ -1605,6 +1630,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteCertificateTemplate[0:len((*c.CallOptions).DeleteCertificateTemplate):len((*c.CallOptions).DeleteCertificateTemplate)], opts...)
 	var resp *longrunningpb.Operation
@@ -1628,6 +1654,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCertificateTemplate[0:len((*c.CallOptions).GetCertificateTemplate):len((*c.CallOptions).GetCertificateTemplate)], opts...)
 	var resp *privatecapb.CertificateTemplate
@@ -1644,6 +1671,7 @@
 
 func (c *certificateAuthorityGRPCClient) ListCertificateTemplates(ctx context.Context, req *privatecapb.ListCertificateTemplatesRequest, opts ...gax.CallOption) *CertificateTemplateIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCertificateTemplates[0:len((*c.CallOptions).ListCertificateTemplates):len((*c.CallOptions).ListCertificateTemplates)], opts...)
 	it := &CertificateTemplateIterator{}
@@ -1693,6 +1721,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "certificate_template.name", url.QueryEscape(req.GetCertificateTemplate().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCertificateTemplate[0:len((*c.CallOptions).UpdateCertificateTemplate):len((*c.CallOptions).UpdateCertificateTemplate)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/security/privateca/apiv1/doc.go b/security/privateca/apiv1/doc.go
index b3ae5aa..f2345fc 100644
--- a/security/privateca/apiv1/doc.go
+++ b/security/privateca/apiv1/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/security/privateca/apiv1/version.go b/security/privateca/apiv1/version.go
new file mode 100644
index 0000000..2ba60fd
--- /dev/null
+++ b/security/privateca/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package privateca
+
+import "cloud.google.com/go/security/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/security/privateca/apiv1beta1/certificate_authority_client.go b/security/privateca/apiv1beta1/certificate_authority_client.go
index 66a4dd1..173a059 100644
--- a/security/privateca/apiv1beta1/certificate_authority_client.go
+++ b/security/privateca/apiv1beta1/certificate_authority_client.go
@@ -664,7 +664,7 @@
 // use by Google-written clients.
 func (c *certificateAuthorityGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -681,6 +681,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCertificate[0:len((*c.CallOptions).CreateCertificate):len((*c.CallOptions).CreateCertificate)], opts...)
 	var resp *privatecapb.Certificate
@@ -702,6 +703,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCertificate[0:len((*c.CallOptions).GetCertificate):len((*c.CallOptions).GetCertificate)], opts...)
 	var resp *privatecapb.Certificate
@@ -718,6 +720,7 @@
 
 func (c *certificateAuthorityGRPCClient) ListCertificates(ctx context.Context, req *privatecapb.ListCertificatesRequest, opts ...gax.CallOption) *CertificateIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCertificates[0:len((*c.CallOptions).ListCertificates):len((*c.CallOptions).ListCertificates)], opts...)
 	it := &CertificateIterator{}
@@ -767,6 +770,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RevokeCertificate[0:len((*c.CallOptions).RevokeCertificate):len((*c.CallOptions).RevokeCertificate)], opts...)
 	var resp *privatecapb.Certificate
@@ -788,6 +792,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "certificate.name", url.QueryEscape(req.GetCertificate().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCertificate[0:len((*c.CallOptions).UpdateCertificate):len((*c.CallOptions).UpdateCertificate)], opts...)
 	var resp *privatecapb.Certificate
@@ -809,6 +814,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ActivateCertificateAuthority[0:len((*c.CallOptions).ActivateCertificateAuthority):len((*c.CallOptions).ActivateCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -832,6 +838,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCertificateAuthority[0:len((*c.CallOptions).CreateCertificateAuthority):len((*c.CallOptions).CreateCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -855,6 +862,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DisableCertificateAuthority[0:len((*c.CallOptions).DisableCertificateAuthority):len((*c.CallOptions).DisableCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -878,6 +886,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).EnableCertificateAuthority[0:len((*c.CallOptions).EnableCertificateAuthority):len((*c.CallOptions).EnableCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -901,6 +910,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FetchCertificateAuthorityCsr[0:len((*c.CallOptions).FetchCertificateAuthorityCsr):len((*c.CallOptions).FetchCertificateAuthorityCsr)], opts...)
 	var resp *privatecapb.FetchCertificateAuthorityCsrResponse
@@ -922,6 +932,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCertificateAuthority[0:len((*c.CallOptions).GetCertificateAuthority):len((*c.CallOptions).GetCertificateAuthority)], opts...)
 	var resp *privatecapb.CertificateAuthority
@@ -938,6 +949,7 @@
 
 func (c *certificateAuthorityGRPCClient) ListCertificateAuthorities(ctx context.Context, req *privatecapb.ListCertificateAuthoritiesRequest, opts ...gax.CallOption) *CertificateAuthorityIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCertificateAuthorities[0:len((*c.CallOptions).ListCertificateAuthorities):len((*c.CallOptions).ListCertificateAuthorities)], opts...)
 	it := &CertificateAuthorityIterator{}
@@ -987,6 +999,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RestoreCertificateAuthority[0:len((*c.CallOptions).RestoreCertificateAuthority):len((*c.CallOptions).RestoreCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -1010,6 +1023,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ScheduleDeleteCertificateAuthority[0:len((*c.CallOptions).ScheduleDeleteCertificateAuthority):len((*c.CallOptions).ScheduleDeleteCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -1033,6 +1047,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "certificate_authority.name", url.QueryEscape(req.GetCertificateAuthority().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCertificateAuthority[0:len((*c.CallOptions).UpdateCertificateAuthority):len((*c.CallOptions).UpdateCertificateAuthority)], opts...)
 	var resp *longrunningpb.Operation
@@ -1056,6 +1071,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCertificateRevocationList[0:len((*c.CallOptions).GetCertificateRevocationList):len((*c.CallOptions).GetCertificateRevocationList)], opts...)
 	var resp *privatecapb.CertificateRevocationList
@@ -1072,6 +1088,7 @@
 
 func (c *certificateAuthorityGRPCClient) ListCertificateRevocationLists(ctx context.Context, req *privatecapb.ListCertificateRevocationListsRequest, opts ...gax.CallOption) *CertificateRevocationListIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCertificateRevocationLists[0:len((*c.CallOptions).ListCertificateRevocationLists):len((*c.CallOptions).ListCertificateRevocationLists)], opts...)
 	it := &CertificateRevocationListIterator{}
@@ -1121,6 +1138,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "certificate_revocation_list.name", url.QueryEscape(req.GetCertificateRevocationList().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCertificateRevocationList[0:len((*c.CallOptions).UpdateCertificateRevocationList):len((*c.CallOptions).UpdateCertificateRevocationList)], opts...)
 	var resp *longrunningpb.Operation
@@ -1144,6 +1162,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetReusableConfig[0:len((*c.CallOptions).GetReusableConfig):len((*c.CallOptions).GetReusableConfig)], opts...)
 	var resp *privatecapb.ReusableConfig
@@ -1160,6 +1179,7 @@
 
 func (c *certificateAuthorityGRPCClient) ListReusableConfigs(ctx context.Context, req *privatecapb.ListReusableConfigsRequest, opts ...gax.CallOption) *ReusableConfigIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListReusableConfigs[0:len((*c.CallOptions).ListReusableConfigs):len((*c.CallOptions).ListReusableConfigs)], opts...)
 	it := &ReusableConfigIterator{}
diff --git a/security/privateca/apiv1beta1/doc.go b/security/privateca/apiv1beta1/doc.go
index bc10f74..24a454a 100644
--- a/security/privateca/apiv1beta1/doc.go
+++ b/security/privateca/apiv1beta1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/security/privateca/apiv1beta1/version.go b/security/privateca/apiv1beta1/version.go
new file mode 100644
index 0000000..2ba60fd
--- /dev/null
+++ b/security/privateca/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package privateca
+
+import "cloud.google.com/go/security/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/securitycenter/apiv1/doc.go b/securitycenter/apiv1/doc.go
index 3ec4f9d..097b846 100644
--- a/securitycenter/apiv1/doc.go
+++ b/securitycenter/apiv1/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/securitycenter/apiv1/security_center_client.go b/securitycenter/apiv1/security_center_client.go
index d8fd823..ed8c87c 100644
--- a/securitycenter/apiv1/security_center_client.go
+++ b/securitycenter/apiv1/security_center_client.go
@@ -598,7 +598,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -610,6 +610,7 @@
 
 func (c *gRPCClient) BulkMuteFindings(ctx context.Context, req *securitycenterpb.BulkMuteFindingsRequest, opts ...gax.CallOption) (*BulkMuteFindingsOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BulkMuteFindings[0:len((*c.CallOptions).BulkMuteFindings):len((*c.CallOptions).BulkMuteFindings)], opts...)
 	var resp *longrunningpb.Operation
@@ -633,6 +634,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSource[0:len((*c.CallOptions).CreateSource):len((*c.CallOptions).CreateSource)], opts...)
 	var resp *securitycenterpb.Source
@@ -654,6 +656,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateFinding[0:len((*c.CallOptions).CreateFinding):len((*c.CallOptions).CreateFinding)], opts...)
 	var resp *securitycenterpb.Finding
@@ -670,6 +673,7 @@
 
 func (c *gRPCClient) CreateMuteConfig(ctx context.Context, req *securitycenterpb.CreateMuteConfigRequest, opts ...gax.CallOption) (*securitycenterpb.MuteConfig, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMuteConfig[0:len((*c.CallOptions).CreateMuteConfig):len((*c.CallOptions).CreateMuteConfig)], opts...)
 	var resp *securitycenterpb.MuteConfig
@@ -691,6 +695,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateNotificationConfig[0:len((*c.CallOptions).CreateNotificationConfig):len((*c.CallOptions).CreateNotificationConfig)], opts...)
 	var resp *securitycenterpb.NotificationConfig
@@ -707,6 +712,7 @@
 
 func (c *gRPCClient) DeleteMuteConfig(ctx context.Context, req *securitycenterpb.DeleteMuteConfigRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteMuteConfig[0:len((*c.CallOptions).DeleteMuteConfig):len((*c.CallOptions).DeleteMuteConfig)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -724,6 +730,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteNotificationConfig[0:len((*c.CallOptions).DeleteNotificationConfig):len((*c.CallOptions).DeleteNotificationConfig)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -741,6 +748,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -757,6 +765,7 @@
 
 func (c *gRPCClient) GetMuteConfig(ctx context.Context, req *securitycenterpb.GetMuteConfigRequest, opts ...gax.CallOption) (*securitycenterpb.MuteConfig, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMuteConfig[0:len((*c.CallOptions).GetMuteConfig):len((*c.CallOptions).GetMuteConfig)], opts...)
 	var resp *securitycenterpb.MuteConfig
@@ -778,6 +787,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetNotificationConfig[0:len((*c.CallOptions).GetNotificationConfig):len((*c.CallOptions).GetNotificationConfig)], opts...)
 	var resp *securitycenterpb.NotificationConfig
@@ -799,6 +809,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetOrganizationSettings[0:len((*c.CallOptions).GetOrganizationSettings):len((*c.CallOptions).GetOrganizationSettings)], opts...)
 	var resp *securitycenterpb.OrganizationSettings
@@ -820,6 +831,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSource[0:len((*c.CallOptions).GetSource):len((*c.CallOptions).GetSource)], opts...)
 	var resp *securitycenterpb.Source
@@ -836,6 +848,7 @@
 
 func (c *gRPCClient) GroupAssets(ctx context.Context, req *securitycenterpb.GroupAssetsRequest, opts ...gax.CallOption) *GroupResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GroupAssets[0:len((*c.CallOptions).GroupAssets):len((*c.CallOptions).GroupAssets)], opts...)
 	it := &GroupResultIterator{}
@@ -880,6 +893,7 @@
 
 func (c *gRPCClient) GroupFindings(ctx context.Context, req *securitycenterpb.GroupFindingsRequest, opts ...gax.CallOption) *GroupResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GroupFindings[0:len((*c.CallOptions).GroupFindings):len((*c.CallOptions).GroupFindings)], opts...)
 	it := &GroupResultIterator{}
@@ -924,6 +938,7 @@
 
 func (c *gRPCClient) ListAssets(ctx context.Context, req *securitycenterpb.ListAssetsRequest, opts ...gax.CallOption) *ListAssetsResponse_ListAssetsResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAssets[0:len((*c.CallOptions).ListAssets):len((*c.CallOptions).ListAssets)], opts...)
 	it := &ListAssetsResponse_ListAssetsResultIterator{}
@@ -968,6 +983,7 @@
 
 func (c *gRPCClient) ListFindings(ctx context.Context, req *securitycenterpb.ListFindingsRequest, opts ...gax.CallOption) *ListFindingsResponse_ListFindingsResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFindings[0:len((*c.CallOptions).ListFindings):len((*c.CallOptions).ListFindings)], opts...)
 	it := &ListFindingsResponse_ListFindingsResultIterator{}
@@ -1012,6 +1028,7 @@
 
 func (c *gRPCClient) ListMuteConfigs(ctx context.Context, req *securitycenterpb.ListMuteConfigsRequest, opts ...gax.CallOption) *MuteConfigIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMuteConfigs[0:len((*c.CallOptions).ListMuteConfigs):len((*c.CallOptions).ListMuteConfigs)], opts...)
 	it := &MuteConfigIterator{}
@@ -1056,6 +1073,7 @@
 
 func (c *gRPCClient) ListNotificationConfigs(ctx context.Context, req *securitycenterpb.ListNotificationConfigsRequest, opts ...gax.CallOption) *NotificationConfigIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListNotificationConfigs[0:len((*c.CallOptions).ListNotificationConfigs):len((*c.CallOptions).ListNotificationConfigs)], opts...)
 	it := &NotificationConfigIterator{}
@@ -1100,6 +1118,7 @@
 
 func (c *gRPCClient) ListSources(ctx context.Context, req *securitycenterpb.ListSourcesRequest, opts ...gax.CallOption) *SourceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSources[0:len((*c.CallOptions).ListSources):len((*c.CallOptions).ListSources)], opts...)
 	it := &SourceIterator{}
@@ -1149,6 +1168,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunAssetDiscovery[0:len((*c.CallOptions).RunAssetDiscovery):len((*c.CallOptions).RunAssetDiscovery)], opts...)
 	var resp *longrunningpb.Operation
@@ -1172,6 +1192,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetFindingState[0:len((*c.CallOptions).SetFindingState):len((*c.CallOptions).SetFindingState)], opts...)
 	var resp *securitycenterpb.Finding
@@ -1188,6 +1209,7 @@
 
 func (c *gRPCClient) SetMute(ctx context.Context, req *securitycenterpb.SetMuteRequest, opts ...gax.CallOption) (*securitycenterpb.Finding, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetMute[0:len((*c.CallOptions).SetMute):len((*c.CallOptions).SetMute)], opts...)
 	var resp *securitycenterpb.Finding
@@ -1209,6 +1231,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -1230,6 +1253,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
@@ -1246,6 +1270,7 @@
 
 func (c *gRPCClient) UpdateExternalSystem(ctx context.Context, req *securitycenterpb.UpdateExternalSystemRequest, opts ...gax.CallOption) (*securitycenterpb.ExternalSystem, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "external_system.name", url.QueryEscape(req.GetExternalSystem().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateExternalSystem[0:len((*c.CallOptions).UpdateExternalSystem):len((*c.CallOptions).UpdateExternalSystem)], opts...)
 	var resp *securitycenterpb.ExternalSystem
@@ -1267,6 +1292,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "finding.name", url.QueryEscape(req.GetFinding().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFinding[0:len((*c.CallOptions).UpdateFinding):len((*c.CallOptions).UpdateFinding)], opts...)
 	var resp *securitycenterpb.Finding
@@ -1283,6 +1309,7 @@
 
 func (c *gRPCClient) UpdateMuteConfig(ctx context.Context, req *securitycenterpb.UpdateMuteConfigRequest, opts ...gax.CallOption) (*securitycenterpb.MuteConfig, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "mute_config.name", url.QueryEscape(req.GetMuteConfig().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateMuteConfig[0:len((*c.CallOptions).UpdateMuteConfig):len((*c.CallOptions).UpdateMuteConfig)], opts...)
 	var resp *securitycenterpb.MuteConfig
@@ -1304,6 +1331,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "notification_config.name", url.QueryEscape(req.GetNotificationConfig().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateNotificationConfig[0:len((*c.CallOptions).UpdateNotificationConfig):len((*c.CallOptions).UpdateNotificationConfig)], opts...)
 	var resp *securitycenterpb.NotificationConfig
@@ -1325,6 +1353,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "organization_settings.name", url.QueryEscape(req.GetOrganizationSettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateOrganizationSettings[0:len((*c.CallOptions).UpdateOrganizationSettings):len((*c.CallOptions).UpdateOrganizationSettings)], opts...)
 	var resp *securitycenterpb.OrganizationSettings
@@ -1346,6 +1375,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "source.name", url.QueryEscape(req.GetSource().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSource[0:len((*c.CallOptions).UpdateSource):len((*c.CallOptions).UpdateSource)], opts...)
 	var resp *securitycenterpb.Source
@@ -1367,6 +1397,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "security_marks.name", url.QueryEscape(req.GetSecurityMarks().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSecurityMarks[0:len((*c.CallOptions).UpdateSecurityMarks):len((*c.CallOptions).UpdateSecurityMarks)], opts...)
 	var resp *securitycenterpb.SecurityMarks
diff --git a/securitycenter/apiv1/version.go b/securitycenter/apiv1/version.go
new file mode 100644
index 0000000..5a26b66
--- /dev/null
+++ b/securitycenter/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package securitycenter
+
+import "cloud.google.com/go/securitycenter/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/securitycenter/apiv1beta1/doc.go b/securitycenter/apiv1beta1/doc.go
index cb19dd1..fb833b9 100644
--- a/securitycenter/apiv1beta1/doc.go
+++ b/securitycenter/apiv1beta1/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/securitycenter/apiv1beta1/security_center_client.go b/securitycenter/apiv1beta1/security_center_client.go
index fc3dd5f..bda949a 100644
--- a/securitycenter/apiv1beta1/security_center_client.go
+++ b/securitycenter/apiv1beta1/security_center_client.go
@@ -460,7 +460,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -477,6 +477,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSource[0:len((*c.CallOptions).CreateSource):len((*c.CallOptions).CreateSource)], opts...)
 	var resp *securitycenterpb.Source
@@ -498,6 +499,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateFinding[0:len((*c.CallOptions).CreateFinding):len((*c.CallOptions).CreateFinding)], opts...)
 	var resp *securitycenterpb.Finding
@@ -519,6 +521,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -540,6 +543,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetOrganizationSettings[0:len((*c.CallOptions).GetOrganizationSettings):len((*c.CallOptions).GetOrganizationSettings)], opts...)
 	var resp *securitycenterpb.OrganizationSettings
@@ -561,6 +565,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSource[0:len((*c.CallOptions).GetSource):len((*c.CallOptions).GetSource)], opts...)
 	var resp *securitycenterpb.Source
@@ -577,6 +582,7 @@
 
 func (c *gRPCClient) GroupAssets(ctx context.Context, req *securitycenterpb.GroupAssetsRequest, opts ...gax.CallOption) *GroupResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GroupAssets[0:len((*c.CallOptions).GroupAssets):len((*c.CallOptions).GroupAssets)], opts...)
 	it := &GroupResultIterator{}
@@ -621,6 +627,7 @@
 
 func (c *gRPCClient) GroupFindings(ctx context.Context, req *securitycenterpb.GroupFindingsRequest, opts ...gax.CallOption) *GroupResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GroupFindings[0:len((*c.CallOptions).GroupFindings):len((*c.CallOptions).GroupFindings)], opts...)
 	it := &GroupResultIterator{}
@@ -665,6 +672,7 @@
 
 func (c *gRPCClient) ListAssets(ctx context.Context, req *securitycenterpb.ListAssetsRequest, opts ...gax.CallOption) *ListAssetsResponse_ListAssetsResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAssets[0:len((*c.CallOptions).ListAssets):len((*c.CallOptions).ListAssets)], opts...)
 	it := &ListAssetsResponse_ListAssetsResultIterator{}
@@ -709,6 +717,7 @@
 
 func (c *gRPCClient) ListFindings(ctx context.Context, req *securitycenterpb.ListFindingsRequest, opts ...gax.CallOption) *FindingIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFindings[0:len((*c.CallOptions).ListFindings):len((*c.CallOptions).ListFindings)], opts...)
 	it := &FindingIterator{}
@@ -753,6 +762,7 @@
 
 func (c *gRPCClient) ListSources(ctx context.Context, req *securitycenterpb.ListSourcesRequest, opts ...gax.CallOption) *SourceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSources[0:len((*c.CallOptions).ListSources):len((*c.CallOptions).ListSources)], opts...)
 	it := &SourceIterator{}
@@ -802,6 +812,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunAssetDiscovery[0:len((*c.CallOptions).RunAssetDiscovery):len((*c.CallOptions).RunAssetDiscovery)], opts...)
 	var resp *longrunningpb.Operation
@@ -825,6 +836,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetFindingState[0:len((*c.CallOptions).SetFindingState):len((*c.CallOptions).SetFindingState)], opts...)
 	var resp *securitycenterpb.Finding
@@ -846,6 +858,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -867,6 +880,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
@@ -888,6 +902,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "finding.name", url.QueryEscape(req.GetFinding().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFinding[0:len((*c.CallOptions).UpdateFinding):len((*c.CallOptions).UpdateFinding)], opts...)
 	var resp *securitycenterpb.Finding
@@ -909,6 +924,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "organization_settings.name", url.QueryEscape(req.GetOrganizationSettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateOrganizationSettings[0:len((*c.CallOptions).UpdateOrganizationSettings):len((*c.CallOptions).UpdateOrganizationSettings)], opts...)
 	var resp *securitycenterpb.OrganizationSettings
@@ -930,6 +946,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "source.name", url.QueryEscape(req.GetSource().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSource[0:len((*c.CallOptions).UpdateSource):len((*c.CallOptions).UpdateSource)], opts...)
 	var resp *securitycenterpb.Source
@@ -951,6 +968,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "security_marks.name", url.QueryEscape(req.GetSecurityMarks().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSecurityMarks[0:len((*c.CallOptions).UpdateSecurityMarks):len((*c.CallOptions).UpdateSecurityMarks)], opts...)
 	var resp *securitycenterpb.SecurityMarks
diff --git a/securitycenter/apiv1beta1/version.go b/securitycenter/apiv1beta1/version.go
new file mode 100644
index 0000000..5a26b66
--- /dev/null
+++ b/securitycenter/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package securitycenter
+
+import "cloud.google.com/go/securitycenter/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/securitycenter/apiv1p1beta1/doc.go b/securitycenter/apiv1p1beta1/doc.go
index 83f8b7d..bd29495 100644
--- a/securitycenter/apiv1p1beta1/doc.go
+++ b/securitycenter/apiv1p1beta1/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/securitycenter/apiv1p1beta1/security_center_client.go b/securitycenter/apiv1p1beta1/security_center_client.go
index 23b64ea..73b6b09 100644
--- a/securitycenter/apiv1p1beta1/security_center_client.go
+++ b/securitycenter/apiv1p1beta1/security_center_client.go
@@ -525,7 +525,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -542,6 +542,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSource[0:len((*c.CallOptions).CreateSource):len((*c.CallOptions).CreateSource)], opts...)
 	var resp *securitycenterpb.Source
@@ -563,6 +564,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateFinding[0:len((*c.CallOptions).CreateFinding):len((*c.CallOptions).CreateFinding)], opts...)
 	var resp *securitycenterpb.Finding
@@ -584,6 +586,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateNotificationConfig[0:len((*c.CallOptions).CreateNotificationConfig):len((*c.CallOptions).CreateNotificationConfig)], opts...)
 	var resp *securitycenterpb.NotificationConfig
@@ -605,6 +608,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteNotificationConfig[0:len((*c.CallOptions).DeleteNotificationConfig):len((*c.CallOptions).DeleteNotificationConfig)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -622,6 +626,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -643,6 +648,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetNotificationConfig[0:len((*c.CallOptions).GetNotificationConfig):len((*c.CallOptions).GetNotificationConfig)], opts...)
 	var resp *securitycenterpb.NotificationConfig
@@ -664,6 +670,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetOrganizationSettings[0:len((*c.CallOptions).GetOrganizationSettings):len((*c.CallOptions).GetOrganizationSettings)], opts...)
 	var resp *securitycenterpb.OrganizationSettings
@@ -685,6 +692,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSource[0:len((*c.CallOptions).GetSource):len((*c.CallOptions).GetSource)], opts...)
 	var resp *securitycenterpb.Source
@@ -701,6 +709,7 @@
 
 func (c *gRPCClient) GroupAssets(ctx context.Context, req *securitycenterpb.GroupAssetsRequest, opts ...gax.CallOption) *GroupResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GroupAssets[0:len((*c.CallOptions).GroupAssets):len((*c.CallOptions).GroupAssets)], opts...)
 	it := &GroupResultIterator{}
@@ -745,6 +754,7 @@
 
 func (c *gRPCClient) GroupFindings(ctx context.Context, req *securitycenterpb.GroupFindingsRequest, opts ...gax.CallOption) *GroupResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GroupFindings[0:len((*c.CallOptions).GroupFindings):len((*c.CallOptions).GroupFindings)], opts...)
 	it := &GroupResultIterator{}
@@ -789,6 +799,7 @@
 
 func (c *gRPCClient) ListAssets(ctx context.Context, req *securitycenterpb.ListAssetsRequest, opts ...gax.CallOption) *ListAssetsResponse_ListAssetsResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAssets[0:len((*c.CallOptions).ListAssets):len((*c.CallOptions).ListAssets)], opts...)
 	it := &ListAssetsResponse_ListAssetsResultIterator{}
@@ -833,6 +844,7 @@
 
 func (c *gRPCClient) ListFindings(ctx context.Context, req *securitycenterpb.ListFindingsRequest, opts ...gax.CallOption) *ListFindingsResponse_ListFindingsResultIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFindings[0:len((*c.CallOptions).ListFindings):len((*c.CallOptions).ListFindings)], opts...)
 	it := &ListFindingsResponse_ListFindingsResultIterator{}
@@ -877,6 +889,7 @@
 
 func (c *gRPCClient) ListNotificationConfigs(ctx context.Context, req *securitycenterpb.ListNotificationConfigsRequest, opts ...gax.CallOption) *NotificationConfigIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListNotificationConfigs[0:len((*c.CallOptions).ListNotificationConfigs):len((*c.CallOptions).ListNotificationConfigs)], opts...)
 	it := &NotificationConfigIterator{}
@@ -921,6 +934,7 @@
 
 func (c *gRPCClient) ListSources(ctx context.Context, req *securitycenterpb.ListSourcesRequest, opts ...gax.CallOption) *SourceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSources[0:len((*c.CallOptions).ListSources):len((*c.CallOptions).ListSources)], opts...)
 	it := &SourceIterator{}
@@ -970,6 +984,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunAssetDiscovery[0:len((*c.CallOptions).RunAssetDiscovery):len((*c.CallOptions).RunAssetDiscovery)], opts...)
 	var resp *longrunningpb.Operation
@@ -993,6 +1008,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetFindingState[0:len((*c.CallOptions).SetFindingState):len((*c.CallOptions).SetFindingState)], opts...)
 	var resp *securitycenterpb.Finding
@@ -1014,6 +1030,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -1035,6 +1052,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
@@ -1056,6 +1074,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "finding.name", url.QueryEscape(req.GetFinding().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateFinding[0:len((*c.CallOptions).UpdateFinding):len((*c.CallOptions).UpdateFinding)], opts...)
 	var resp *securitycenterpb.Finding
@@ -1077,6 +1096,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "notification_config.name", url.QueryEscape(req.GetNotificationConfig().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateNotificationConfig[0:len((*c.CallOptions).UpdateNotificationConfig):len((*c.CallOptions).UpdateNotificationConfig)], opts...)
 	var resp *securitycenterpb.NotificationConfig
@@ -1098,6 +1118,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "organization_settings.name", url.QueryEscape(req.GetOrganizationSettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateOrganizationSettings[0:len((*c.CallOptions).UpdateOrganizationSettings):len((*c.CallOptions).UpdateOrganizationSettings)], opts...)
 	var resp *securitycenterpb.OrganizationSettings
@@ -1119,6 +1140,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "source.name", url.QueryEscape(req.GetSource().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSource[0:len((*c.CallOptions).UpdateSource):len((*c.CallOptions).UpdateSource)], opts...)
 	var resp *securitycenterpb.Source
@@ -1140,6 +1162,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "security_marks.name", url.QueryEscape(req.GetSecurityMarks().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSecurityMarks[0:len((*c.CallOptions).UpdateSecurityMarks):len((*c.CallOptions).UpdateSecurityMarks)], opts...)
 	var resp *securitycenterpb.SecurityMarks
diff --git a/securitycenter/apiv1p1beta1/version.go b/securitycenter/apiv1p1beta1/version.go
new file mode 100644
index 0000000..5a26b66
--- /dev/null
+++ b/securitycenter/apiv1p1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package securitycenter
+
+import "cloud.google.com/go/securitycenter/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/securitycenter/settings/apiv1beta1/doc.go b/securitycenter/settings/apiv1beta1/doc.go
index 7616d76..894745f 100644
--- a/securitycenter/settings/apiv1beta1/doc.go
+++ b/securitycenter/settings/apiv1beta1/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/securitycenter/settings/apiv1beta1/security_center_settings_client.go b/securitycenter/settings/apiv1beta1/security_center_settings_client.go
index b0aa5ed..950191b 100644
--- a/securitycenter/settings/apiv1beta1/security_center_settings_client.go
+++ b/securitycenter/settings/apiv1beta1/security_center_settings_client.go
@@ -457,7 +457,7 @@
 // use by Google-written clients.
 func (c *securityCenterSettingsGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -474,6 +474,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetServiceAccount[0:len((*c.CallOptions).GetServiceAccount):len((*c.CallOptions).GetServiceAccount)], opts...)
 	var resp *settingspb.ServiceAccount
@@ -495,6 +496,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSettings[0:len((*c.CallOptions).GetSettings):len((*c.CallOptions).GetSettings)], opts...)
 	var resp *settingspb.Settings
@@ -516,6 +518,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "settings.name", url.QueryEscape(req.GetSettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSettings[0:len((*c.CallOptions).UpdateSettings):len((*c.CallOptions).UpdateSettings)], opts...)
 	var resp *settingspb.Settings
@@ -537,6 +540,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResetSettings[0:len((*c.CallOptions).ResetSettings):len((*c.CallOptions).ResetSettings)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -554,6 +558,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchGetSettings[0:len((*c.CallOptions).BatchGetSettings):len((*c.CallOptions).BatchGetSettings)], opts...)
 	var resp *settingspb.BatchGetSettingsResponse
@@ -575,6 +580,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CalculateEffectiveSettings[0:len((*c.CallOptions).CalculateEffectiveSettings):len((*c.CallOptions).CalculateEffectiveSettings)], opts...)
 	var resp *settingspb.Settings
@@ -596,6 +602,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCalculateEffectiveSettings[0:len((*c.CallOptions).BatchCalculateEffectiveSettings):len((*c.CallOptions).BatchCalculateEffectiveSettings)], opts...)
 	var resp *settingspb.BatchCalculateEffectiveSettingsResponse
@@ -617,6 +624,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetComponentSettings[0:len((*c.CallOptions).GetComponentSettings):len((*c.CallOptions).GetComponentSettings)], opts...)
 	var resp *settingspb.ComponentSettings
@@ -638,6 +646,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "component_settings.name", url.QueryEscape(req.GetComponentSettings().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateComponentSettings[0:len((*c.CallOptions).UpdateComponentSettings):len((*c.CallOptions).UpdateComponentSettings)], opts...)
 	var resp *settingspb.ComponentSettings
@@ -659,6 +668,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResetComponentSettings[0:len((*c.CallOptions).ResetComponentSettings):len((*c.CallOptions).ResetComponentSettings)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -676,6 +686,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CalculateEffectiveComponentSettings[0:len((*c.CallOptions).CalculateEffectiveComponentSettings):len((*c.CallOptions).CalculateEffectiveComponentSettings)], opts...)
 	var resp *settingspb.ComponentSettings
@@ -692,6 +703,7 @@
 
 func (c *securityCenterSettingsGRPCClient) ListDetectors(ctx context.Context, req *settingspb.ListDetectorsRequest, opts ...gax.CallOption) *DetectorIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDetectors[0:len((*c.CallOptions).ListDetectors):len((*c.CallOptions).ListDetectors)], opts...)
 	it := &DetectorIterator{}
@@ -736,6 +748,7 @@
 
 func (c *securityCenterSettingsGRPCClient) ListComponents(ctx context.Context, req *settingspb.ListComponentsRequest, opts ...gax.CallOption) *StringIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListComponents[0:len((*c.CallOptions).ListComponents):len((*c.CallOptions).ListComponents)], opts...)
 	it := &StringIterator{}
diff --git a/securitycenter/settings/apiv1beta1/version.go b/securitycenter/settings/apiv1beta1/version.go
new file mode 100644
index 0000000..8a5ee94
--- /dev/null
+++ b/securitycenter/settings/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package settings
+
+import "cloud.google.com/go/securitycenter/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/servicecontrol/apiv1/doc.go b/servicecontrol/apiv1/doc.go
index 2ed94f7..3adaef2 100644
--- a/servicecontrol/apiv1/doc.go
+++ b/servicecontrol/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/servicecontrol/apiv1/quota_controller_client.go b/servicecontrol/apiv1/quota_controller_client.go
index 4f8463a..4cc7f41 100644
--- a/servicecontrol/apiv1/quota_controller_client.go
+++ b/servicecontrol/apiv1/quota_controller_client.go
@@ -189,7 +189,7 @@
 // use by Google-written clients.
 func (c *quotaControllerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -201,6 +201,7 @@
 
 func (c *quotaControllerGRPCClient) AllocateQuota(ctx context.Context, req *servicecontrolpb.AllocateQuotaRequest, opts ...gax.CallOption) (*servicecontrolpb.AllocateQuotaResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_name", url.QueryEscape(req.GetServiceName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AllocateQuota[0:len((*c.CallOptions).AllocateQuota):len((*c.CallOptions).AllocateQuota)], opts...)
 	var resp *servicecontrolpb.AllocateQuotaResponse
diff --git a/servicecontrol/apiv1/service_controller_client.go b/servicecontrol/apiv1/service_controller_client.go
index a536c11..6198069 100644
--- a/servicecontrol/apiv1/service_controller_client.go
+++ b/servicecontrol/apiv1/service_controller_client.go
@@ -217,7 +217,7 @@
 // use by Google-written clients.
 func (c *serviceControllerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -229,6 +229,7 @@
 
 func (c *serviceControllerGRPCClient) Check(ctx context.Context, req *servicecontrolpb.CheckRequest, opts ...gax.CallOption) (*servicecontrolpb.CheckResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_name", url.QueryEscape(req.GetServiceName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Check[0:len((*c.CallOptions).Check):len((*c.CallOptions).Check)], opts...)
 	var resp *servicecontrolpb.CheckResponse
@@ -245,6 +246,7 @@
 
 func (c *serviceControllerGRPCClient) Report(ctx context.Context, req *servicecontrolpb.ReportRequest, opts ...gax.CallOption) (*servicecontrolpb.ReportResponse, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_name", url.QueryEscape(req.GetServiceName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Report[0:len((*c.CallOptions).Report):len((*c.CallOptions).Report)], opts...)
 	var resp *servicecontrolpb.ReportResponse
diff --git a/servicecontrol/apiv1/version.go b/servicecontrol/apiv1/version.go
new file mode 100644
index 0000000..41204f1
--- /dev/null
+++ b/servicecontrol/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package servicecontrol
+
+import "cloud.google.com/go/servicecontrol/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/servicedirectory/apiv1/doc.go b/servicedirectory/apiv1/doc.go
index 0c03753..d73f6d3 100644
--- a/servicedirectory/apiv1/doc.go
+++ b/servicedirectory/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/servicedirectory/apiv1/lookup_client.go b/servicedirectory/apiv1/lookup_client.go
index 7a4ead9..88cc963 100644
--- a/servicedirectory/apiv1/lookup_client.go
+++ b/servicedirectory/apiv1/lookup_client.go
@@ -188,7 +188,7 @@
 // use by Google-written clients.
 func (c *lookupGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -205,6 +205,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResolveService[0:len((*c.CallOptions).ResolveService):len((*c.CallOptions).ResolveService)], opts...)
 	var resp *servicedirectorypb.ResolveServiceResponse
diff --git a/servicedirectory/apiv1/registration_client.go b/servicedirectory/apiv1/registration_client.go
index af64538..2e4128c 100644
--- a/servicedirectory/apiv1/registration_client.go
+++ b/servicedirectory/apiv1/registration_client.go
@@ -542,7 +542,7 @@
 // use by Google-written clients.
 func (c *registrationGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -559,6 +559,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateNamespace[0:len((*c.CallOptions).CreateNamespace):len((*c.CallOptions).CreateNamespace)], opts...)
 	var resp *servicedirectorypb.Namespace
@@ -575,6 +576,7 @@
 
 func (c *registrationGRPCClient) ListNamespaces(ctx context.Context, req *servicedirectorypb.ListNamespacesRequest, opts ...gax.CallOption) *NamespaceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListNamespaces[0:len((*c.CallOptions).ListNamespaces):len((*c.CallOptions).ListNamespaces)], opts...)
 	it := &NamespaceIterator{}
@@ -624,6 +626,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetNamespace[0:len((*c.CallOptions).GetNamespace):len((*c.CallOptions).GetNamespace)], opts...)
 	var resp *servicedirectorypb.Namespace
@@ -645,6 +648,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "namespace.name", url.QueryEscape(req.GetNamespace().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateNamespace[0:len((*c.CallOptions).UpdateNamespace):len((*c.CallOptions).UpdateNamespace)], opts...)
 	var resp *servicedirectorypb.Namespace
@@ -666,6 +670,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteNamespace[0:len((*c.CallOptions).DeleteNamespace):len((*c.CallOptions).DeleteNamespace)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -683,6 +688,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateService[0:len((*c.CallOptions).CreateService):len((*c.CallOptions).CreateService)], opts...)
 	var resp *servicedirectorypb.Service
@@ -699,6 +705,7 @@
 
 func (c *registrationGRPCClient) ListServices(ctx context.Context, req *servicedirectorypb.ListServicesRequest, opts ...gax.CallOption) *ServiceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServices[0:len((*c.CallOptions).ListServices):len((*c.CallOptions).ListServices)], opts...)
 	it := &ServiceIterator{}
@@ -748,6 +755,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetService[0:len((*c.CallOptions).GetService):len((*c.CallOptions).GetService)], opts...)
 	var resp *servicedirectorypb.Service
@@ -769,6 +777,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service.name", url.QueryEscape(req.GetService().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateService[0:len((*c.CallOptions).UpdateService):len((*c.CallOptions).UpdateService)], opts...)
 	var resp *servicedirectorypb.Service
@@ -790,6 +799,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteService[0:len((*c.CallOptions).DeleteService):len((*c.CallOptions).DeleteService)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -807,6 +817,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEndpoint[0:len((*c.CallOptions).CreateEndpoint):len((*c.CallOptions).CreateEndpoint)], opts...)
 	var resp *servicedirectorypb.Endpoint
@@ -823,6 +834,7 @@
 
 func (c *registrationGRPCClient) ListEndpoints(ctx context.Context, req *servicedirectorypb.ListEndpointsRequest, opts ...gax.CallOption) *EndpointIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEndpoints[0:len((*c.CallOptions).ListEndpoints):len((*c.CallOptions).ListEndpoints)], opts...)
 	it := &EndpointIterator{}
@@ -872,6 +884,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEndpoint[0:len((*c.CallOptions).GetEndpoint):len((*c.CallOptions).GetEndpoint)], opts...)
 	var resp *servicedirectorypb.Endpoint
@@ -893,6 +906,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint.name", url.QueryEscape(req.GetEndpoint().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEndpoint[0:len((*c.CallOptions).UpdateEndpoint):len((*c.CallOptions).UpdateEndpoint)], opts...)
 	var resp *servicedirectorypb.Endpoint
@@ -914,6 +928,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEndpoint[0:len((*c.CallOptions).DeleteEndpoint):len((*c.CallOptions).DeleteEndpoint)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -931,6 +946,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -952,6 +968,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -973,6 +990,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/servicedirectory/apiv1/version.go b/servicedirectory/apiv1/version.go
new file mode 100644
index 0000000..47402e3
--- /dev/null
+++ b/servicedirectory/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package servicedirectory
+
+import "cloud.google.com/go/servicedirectory/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/servicedirectory/apiv1beta1/doc.go b/servicedirectory/apiv1beta1/doc.go
index ed7975b..b222f55 100644
--- a/servicedirectory/apiv1beta1/doc.go
+++ b/servicedirectory/apiv1beta1/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/servicedirectory/apiv1beta1/lookup_client.go b/servicedirectory/apiv1beta1/lookup_client.go
index b078100..25c84d1 100644
--- a/servicedirectory/apiv1beta1/lookup_client.go
+++ b/servicedirectory/apiv1beta1/lookup_client.go
@@ -188,7 +188,7 @@
 // use by Google-written clients.
 func (c *lookupGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -205,6 +205,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResolveService[0:len((*c.CallOptions).ResolveService):len((*c.CallOptions).ResolveService)], opts...)
 	var resp *servicedirectorypb.ResolveServiceResponse
diff --git a/servicedirectory/apiv1beta1/registration_client.go b/servicedirectory/apiv1beta1/registration_client.go
index 855b430..e4984d9 100644
--- a/servicedirectory/apiv1beta1/registration_client.go
+++ b/servicedirectory/apiv1beta1/registration_client.go
@@ -542,7 +542,7 @@
 // use by Google-written clients.
 func (c *registrationGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -559,6 +559,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateNamespace[0:len((*c.CallOptions).CreateNamespace):len((*c.CallOptions).CreateNamespace)], opts...)
 	var resp *servicedirectorypb.Namespace
@@ -575,6 +576,7 @@
 
 func (c *registrationGRPCClient) ListNamespaces(ctx context.Context, req *servicedirectorypb.ListNamespacesRequest, opts ...gax.CallOption) *NamespaceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListNamespaces[0:len((*c.CallOptions).ListNamespaces):len((*c.CallOptions).ListNamespaces)], opts...)
 	it := &NamespaceIterator{}
@@ -624,6 +626,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetNamespace[0:len((*c.CallOptions).GetNamespace):len((*c.CallOptions).GetNamespace)], opts...)
 	var resp *servicedirectorypb.Namespace
@@ -645,6 +648,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "namespace.name", url.QueryEscape(req.GetNamespace().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateNamespace[0:len((*c.CallOptions).UpdateNamespace):len((*c.CallOptions).UpdateNamespace)], opts...)
 	var resp *servicedirectorypb.Namespace
@@ -666,6 +670,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteNamespace[0:len((*c.CallOptions).DeleteNamespace):len((*c.CallOptions).DeleteNamespace)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -683,6 +688,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateService[0:len((*c.CallOptions).CreateService):len((*c.CallOptions).CreateService)], opts...)
 	var resp *servicedirectorypb.Service
@@ -699,6 +705,7 @@
 
 func (c *registrationGRPCClient) ListServices(ctx context.Context, req *servicedirectorypb.ListServicesRequest, opts ...gax.CallOption) *ServiceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServices[0:len((*c.CallOptions).ListServices):len((*c.CallOptions).ListServices)], opts...)
 	it := &ServiceIterator{}
@@ -748,6 +755,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetService[0:len((*c.CallOptions).GetService):len((*c.CallOptions).GetService)], opts...)
 	var resp *servicedirectorypb.Service
@@ -769,6 +777,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service.name", url.QueryEscape(req.GetService().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateService[0:len((*c.CallOptions).UpdateService):len((*c.CallOptions).UpdateService)], opts...)
 	var resp *servicedirectorypb.Service
@@ -790,6 +799,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteService[0:len((*c.CallOptions).DeleteService):len((*c.CallOptions).DeleteService)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -807,6 +817,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEndpoint[0:len((*c.CallOptions).CreateEndpoint):len((*c.CallOptions).CreateEndpoint)], opts...)
 	var resp *servicedirectorypb.Endpoint
@@ -823,6 +834,7 @@
 
 func (c *registrationGRPCClient) ListEndpoints(ctx context.Context, req *servicedirectorypb.ListEndpointsRequest, opts ...gax.CallOption) *EndpointIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEndpoints[0:len((*c.CallOptions).ListEndpoints):len((*c.CallOptions).ListEndpoints)], opts...)
 	it := &EndpointIterator{}
@@ -872,6 +884,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEndpoint[0:len((*c.CallOptions).GetEndpoint):len((*c.CallOptions).GetEndpoint)], opts...)
 	var resp *servicedirectorypb.Endpoint
@@ -893,6 +906,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint.name", url.QueryEscape(req.GetEndpoint().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateEndpoint[0:len((*c.CallOptions).UpdateEndpoint):len((*c.CallOptions).UpdateEndpoint)], opts...)
 	var resp *servicedirectorypb.Endpoint
@@ -914,6 +928,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEndpoint[0:len((*c.CallOptions).DeleteEndpoint):len((*c.CallOptions).DeleteEndpoint)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -931,6 +946,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -952,6 +968,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -973,6 +990,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/servicedirectory/apiv1beta1/version.go b/servicedirectory/apiv1beta1/version.go
new file mode 100644
index 0000000..47402e3
--- /dev/null
+++ b/servicedirectory/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package servicedirectory
+
+import "cloud.google.com/go/servicedirectory/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/servicemanagement/apiv1/doc.go b/servicemanagement/apiv1/doc.go
index 443bcaa..c067b45 100644
--- a/servicemanagement/apiv1/doc.go
+++ b/servicemanagement/apiv1/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/servicemanagement/apiv1/service_manager_client.go b/servicemanagement/apiv1/service_manager_client.go
index 4168e4d..c4743ee 100644
--- a/servicemanagement/apiv1/service_manager_client.go
+++ b/servicemanagement/apiv1/service_manager_client.go
@@ -401,7 +401,7 @@
 // use by Google-written clients.
 func (c *serviceManagerGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -461,6 +461,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_name", url.QueryEscape(req.GetServiceName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetService[0:len((*c.CallOptions).GetService):len((*c.CallOptions).GetService)], opts...)
 	var resp *servicemanagementpb.ManagedService
@@ -504,6 +505,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_name", url.QueryEscape(req.GetServiceName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteService[0:len((*c.CallOptions).DeleteService):len((*c.CallOptions).DeleteService)], opts...)
 	var resp *longrunningpb.Operation
@@ -527,6 +529,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_name", url.QueryEscape(req.GetServiceName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UndeleteService[0:len((*c.CallOptions).UndeleteService):len((*c.CallOptions).UndeleteService)], opts...)
 	var resp *longrunningpb.Operation
@@ -545,6 +548,7 @@
 
 func (c *serviceManagerGRPCClient) ListServiceConfigs(ctx context.Context, req *servicemanagementpb.ListServiceConfigsRequest, opts ...gax.CallOption) *ServiceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_name", url.QueryEscape(req.GetServiceName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServiceConfigs[0:len((*c.CallOptions).ListServiceConfigs):len((*c.CallOptions).ListServiceConfigs)], opts...)
 	it := &ServiceIterator{}
@@ -594,6 +598,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "service_name", url.QueryEscape(req.GetServiceName()), "config_id", url.QueryEscape(req.GetConfigId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetServiceConfig[0:len((*c.CallOptions).GetServiceConfig):len((*c.CallOptions).GetServiceConfig)], opts...)
 	var resp *serviceconfigpb.Service
@@ -615,6 +620,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_name", url.QueryEscape(req.GetServiceName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateServiceConfig[0:len((*c.CallOptions).CreateServiceConfig):len((*c.CallOptions).CreateServiceConfig)], opts...)
 	var resp *serviceconfigpb.Service
@@ -636,6 +642,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_name", url.QueryEscape(req.GetServiceName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SubmitConfigSource[0:len((*c.CallOptions).SubmitConfigSource):len((*c.CallOptions).SubmitConfigSource)], opts...)
 	var resp *longrunningpb.Operation
@@ -654,6 +661,7 @@
 
 func (c *serviceManagerGRPCClient) ListServiceRollouts(ctx context.Context, req *servicemanagementpb.ListServiceRolloutsRequest, opts ...gax.CallOption) *RolloutIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_name", url.QueryEscape(req.GetServiceName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServiceRollouts[0:len((*c.CallOptions).ListServiceRollouts):len((*c.CallOptions).ListServiceRollouts)], opts...)
 	it := &RolloutIterator{}
@@ -703,6 +711,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "service_name", url.QueryEscape(req.GetServiceName()), "rollout_id", url.QueryEscape(req.GetRolloutId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetServiceRollout[0:len((*c.CallOptions).GetServiceRollout):len((*c.CallOptions).GetServiceRollout)], opts...)
 	var resp *servicemanagementpb.Rollout
@@ -724,6 +733,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "service_name", url.QueryEscape(req.GetServiceName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateServiceRollout[0:len((*c.CallOptions).CreateServiceRollout):len((*c.CallOptions).CreateServiceRollout)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/servicemanagement/apiv1/version.go b/servicemanagement/apiv1/version.go
new file mode 100644
index 0000000..47fb46a
--- /dev/null
+++ b/servicemanagement/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package servicemanagement
+
+import "cloud.google.com/go/servicemanagement/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/serviceusage/apiv1/doc.go b/serviceusage/apiv1/doc.go
index 356f966..b78c8cd 100644
--- a/serviceusage/apiv1/doc.go
+++ b/serviceusage/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/serviceusage/apiv1/service_usage_client.go b/serviceusage/apiv1/service_usage_client.go
index 12fef01..72ecaa3 100644
--- a/serviceusage/apiv1/service_usage_client.go
+++ b/serviceusage/apiv1/service_usage_client.go
@@ -290,7 +290,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -307,6 +307,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).EnableService[0:len((*c.CallOptions).EnableService):len((*c.CallOptions).EnableService)], opts...)
 	var resp *longrunningpb.Operation
@@ -330,6 +331,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DisableService[0:len((*c.CallOptions).DisableService):len((*c.CallOptions).DisableService)], opts...)
 	var resp *longrunningpb.Operation
@@ -353,6 +355,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetService[0:len((*c.CallOptions).GetService):len((*c.CallOptions).GetService)], opts...)
 	var resp *serviceusagepb.Service
@@ -369,6 +372,7 @@
 
 func (c *gRPCClient) ListServices(ctx context.Context, req *serviceusagepb.ListServicesRequest, opts ...gax.CallOption) *ServiceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListServices[0:len((*c.CallOptions).ListServices):len((*c.CallOptions).ListServices)], opts...)
 	it := &ServiceIterator{}
@@ -418,6 +422,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchEnableServices[0:len((*c.CallOptions).BatchEnableServices):len((*c.CallOptions).BatchEnableServices)], opts...)
 	var resp *longrunningpb.Operation
@@ -441,6 +446,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchGetServices[0:len((*c.CallOptions).BatchGetServices):len((*c.CallOptions).BatchGetServices)], opts...)
 	var resp *serviceusagepb.BatchGetServicesResponse
diff --git a/serviceusage/apiv1/version.go b/serviceusage/apiv1/version.go
new file mode 100644
index 0000000..ea23174
--- /dev/null
+++ b/serviceusage/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package serviceusage
+
+import "cloud.google.com/go/serviceusage/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/shell/apiv1/cloud_shell_client.go b/shell/apiv1/cloud_shell_client.go
index e370ba1..f9c54c0 100644
--- a/shell/apiv1/cloud_shell_client.go
+++ b/shell/apiv1/cloud_shell_client.go
@@ -295,7 +295,7 @@
 // use by Google-written clients.
 func (c *cloudShellGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -312,6 +312,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEnvironment[0:len((*c.CallOptions).GetEnvironment):len((*c.CallOptions).GetEnvironment)], opts...)
 	var resp *shellpb.Environment
@@ -333,6 +334,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartEnvironment[0:len((*c.CallOptions).StartEnvironment):len((*c.CallOptions).StartEnvironment)], opts...)
 	var resp *longrunningpb.Operation
@@ -356,6 +358,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AuthorizeEnvironment[0:len((*c.CallOptions).AuthorizeEnvironment):len((*c.CallOptions).AuthorizeEnvironment)], opts...)
 	var resp *longrunningpb.Operation
@@ -379,6 +382,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "environment", url.QueryEscape(req.GetEnvironment())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AddPublicKey[0:len((*c.CallOptions).AddPublicKey):len((*c.CallOptions).AddPublicKey)], opts...)
 	var resp *longrunningpb.Operation
@@ -402,6 +406,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "environment", url.QueryEscape(req.GetEnvironment())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RemovePublicKey[0:len((*c.CallOptions).RemovePublicKey):len((*c.CallOptions).RemovePublicKey)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/shell/apiv1/doc.go b/shell/apiv1/doc.go
index e0549dd..095cfbc 100644
--- a/shell/apiv1/doc.go
+++ b/shell/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/shell/apiv1/version.go b/shell/apiv1/version.go
new file mode 100644
index 0000000..f45fc9d
--- /dev/null
+++ b/shell/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package shell
+
+import "cloud.google.com/go/shell/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/spanner/admin/database/apiv1/database_admin_client.go b/spanner/admin/database/apiv1/database_admin_client.go
index 0f13cf5..7f6fe23 100644
--- a/spanner/admin/database/apiv1/database_admin_client.go
+++ b/spanner/admin/database/apiv1/database_admin_client.go
@@ -596,7 +596,7 @@
 // use by Google-written clients.
 func (c *databaseAdminGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -608,6 +608,7 @@
 
 func (c *databaseAdminGRPCClient) ListDatabases(ctx context.Context, req *databasepb.ListDatabasesRequest, opts ...gax.CallOption) *DatabaseIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDatabases[0:len((*c.CallOptions).ListDatabases):len((*c.CallOptions).ListDatabases)], opts...)
 	it := &DatabaseIterator{}
@@ -657,6 +658,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDatabase[0:len((*c.CallOptions).CreateDatabase):len((*c.CallOptions).CreateDatabase)], opts...)
 	var resp *longrunningpb.Operation
@@ -680,6 +682,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDatabase[0:len((*c.CallOptions).GetDatabase):len((*c.CallOptions).GetDatabase)], opts...)
 	var resp *databasepb.Database
@@ -701,6 +704,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "database", url.QueryEscape(req.GetDatabase())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateDatabaseDdl[0:len((*c.CallOptions).UpdateDatabaseDdl):len((*c.CallOptions).UpdateDatabaseDdl)], opts...)
 	var resp *longrunningpb.Operation
@@ -724,6 +728,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "database", url.QueryEscape(req.GetDatabase())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DropDatabase[0:len((*c.CallOptions).DropDatabase):len((*c.CallOptions).DropDatabase)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -741,6 +746,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "database", url.QueryEscape(req.GetDatabase())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDatabaseDdl[0:len((*c.CallOptions).GetDatabaseDdl):len((*c.CallOptions).GetDatabaseDdl)], opts...)
 	var resp *databasepb.GetDatabaseDdlResponse
@@ -762,6 +768,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -783,6 +790,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -804,6 +812,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
@@ -825,6 +834,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateBackup[0:len((*c.CallOptions).CreateBackup):len((*c.CallOptions).CreateBackup)], opts...)
 	var resp *longrunningpb.Operation
@@ -848,6 +858,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetBackup[0:len((*c.CallOptions).GetBackup):len((*c.CallOptions).GetBackup)], opts...)
 	var resp *databasepb.Backup
@@ -869,6 +880,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "backup.name", url.QueryEscape(req.GetBackup().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateBackup[0:len((*c.CallOptions).UpdateBackup):len((*c.CallOptions).UpdateBackup)], opts...)
 	var resp *databasepb.Backup
@@ -890,6 +902,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteBackup[0:len((*c.CallOptions).DeleteBackup):len((*c.CallOptions).DeleteBackup)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -902,6 +915,7 @@
 
 func (c *databaseAdminGRPCClient) ListBackups(ctx context.Context, req *databasepb.ListBackupsRequest, opts ...gax.CallOption) *BackupIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBackups[0:len((*c.CallOptions).ListBackups):len((*c.CallOptions).ListBackups)], opts...)
 	it := &BackupIterator{}
@@ -951,6 +965,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RestoreDatabase[0:len((*c.CallOptions).RestoreDatabase):len((*c.CallOptions).RestoreDatabase)], opts...)
 	var resp *longrunningpb.Operation
@@ -969,6 +984,7 @@
 
 func (c *databaseAdminGRPCClient) ListDatabaseOperations(ctx context.Context, req *databasepb.ListDatabaseOperationsRequest, opts ...gax.CallOption) *OperationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDatabaseOperations[0:len((*c.CallOptions).ListDatabaseOperations):len((*c.CallOptions).ListDatabaseOperations)], opts...)
 	it := &OperationIterator{}
@@ -1013,6 +1029,7 @@
 
 func (c *databaseAdminGRPCClient) ListBackupOperations(ctx context.Context, req *databasepb.ListBackupOperationsRequest, opts ...gax.CallOption) *OperationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListBackupOperations[0:len((*c.CallOptions).ListBackupOperations):len((*c.CallOptions).ListBackupOperations)], opts...)
 	it := &OperationIterator{}
diff --git a/spanner/admin/database/apiv1/doc.go b/spanner/admin/database/apiv1/doc.go
index c888239..d0f2482 100644
--- a/spanner/admin/database/apiv1/doc.go
+++ b/spanner/admin/database/apiv1/doc.go
@@ -88,7 +88,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/spanner/admin/database/apiv1/version.go b/spanner/admin/database/apiv1/version.go
new file mode 100644
index 0000000..2acd88d
--- /dev/null
+++ b/spanner/admin/database/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package database
+
+import "cloud.google.com/go/spanner/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/spanner/admin/instance/apiv1/doc.go b/spanner/admin/instance/apiv1/doc.go
index 5acd063..a697ece 100644
--- a/spanner/admin/instance/apiv1/doc.go
+++ b/spanner/admin/instance/apiv1/doc.go
@@ -88,7 +88,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/spanner/admin/instance/apiv1/instance_admin_client.go b/spanner/admin/instance/apiv1/instance_admin_client.go
index 46606aa..a97ed7d 100644
--- a/spanner/admin/instance/apiv1/instance_admin_client.go
+++ b/spanner/admin/instance/apiv1/instance_admin_client.go
@@ -498,7 +498,7 @@
 // use by Google-written clients.
 func (c *instanceAdminGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -510,6 +510,7 @@
 
 func (c *instanceAdminGRPCClient) ListInstanceConfigs(ctx context.Context, req *instancepb.ListInstanceConfigsRequest, opts ...gax.CallOption) *InstanceConfigIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInstanceConfigs[0:len((*c.CallOptions).ListInstanceConfigs):len((*c.CallOptions).ListInstanceConfigs)], opts...)
 	it := &InstanceConfigIterator{}
@@ -559,6 +560,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstanceConfig[0:len((*c.CallOptions).GetInstanceConfig):len((*c.CallOptions).GetInstanceConfig)], opts...)
 	var resp *instancepb.InstanceConfig
@@ -575,6 +577,7 @@
 
 func (c *instanceAdminGRPCClient) ListInstances(ctx context.Context, req *instancepb.ListInstancesRequest, opts ...gax.CallOption) *InstanceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInstances[0:len((*c.CallOptions).ListInstances):len((*c.CallOptions).ListInstances)], opts...)
 	it := &InstanceIterator{}
@@ -624,6 +627,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInstance[0:len((*c.CallOptions).GetInstance):len((*c.CallOptions).GetInstance)], opts...)
 	var resp *instancepb.Instance
@@ -645,6 +649,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateInstance[0:len((*c.CallOptions).CreateInstance):len((*c.CallOptions).CreateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -668,6 +673,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "instance.name", url.QueryEscape(req.GetInstance().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateInstance[0:len((*c.CallOptions).UpdateInstance):len((*c.CallOptions).UpdateInstance)], opts...)
 	var resp *longrunningpb.Operation
@@ -691,6 +697,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteInstance[0:len((*c.CallOptions).DeleteInstance):len((*c.CallOptions).DeleteInstance)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -708,6 +715,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -729,6 +737,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
 	var resp *iampb.Policy
@@ -750,6 +759,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
 	var resp *iampb.TestIamPermissionsResponse
diff --git a/spanner/admin/instance/apiv1/version.go b/spanner/admin/instance/apiv1/version.go
new file mode 100644
index 0000000..6c036d6
--- /dev/null
+++ b/spanner/admin/instance/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package instance
+
+import "cloud.google.com/go/spanner/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/spanner/apiv1/doc.go b/spanner/apiv1/doc.go
index 0b4fe82..b3e672f 100644
--- a/spanner/apiv1/doc.go
+++ b/spanner/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/spanner/apiv1/spanner_client.go b/spanner/apiv1/spanner_client.go
index b646a2f..6a04a37 100644
--- a/spanner/apiv1/spanner_client.go
+++ b/spanner/apiv1/spanner_client.go
@@ -535,7 +535,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -552,6 +552,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "database", url.QueryEscape(req.GetDatabase())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSession[0:len((*c.CallOptions).CreateSession):len((*c.CallOptions).CreateSession)], opts...)
 	var resp *spannerpb.Session
@@ -573,6 +574,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "database", url.QueryEscape(req.GetDatabase())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCreateSessions[0:len((*c.CallOptions).BatchCreateSessions):len((*c.CallOptions).BatchCreateSessions)], opts...)
 	var resp *spannerpb.BatchCreateSessionsResponse
@@ -594,6 +596,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSession[0:len((*c.CallOptions).GetSession):len((*c.CallOptions).GetSession)], opts...)
 	var resp *spannerpb.Session
@@ -610,6 +613,7 @@
 
 func (c *gRPCClient) ListSessions(ctx context.Context, req *spannerpb.ListSessionsRequest, opts ...gax.CallOption) *SessionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "database", url.QueryEscape(req.GetDatabase())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSessions[0:len((*c.CallOptions).ListSessions):len((*c.CallOptions).ListSessions)], opts...)
 	it := &SessionIterator{}
@@ -659,6 +663,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSession[0:len((*c.CallOptions).DeleteSession):len((*c.CallOptions).DeleteSession)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -676,6 +681,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExecuteSql[0:len((*c.CallOptions).ExecuteSql):len((*c.CallOptions).ExecuteSql)], opts...)
 	var resp *spannerpb.ResultSet
@@ -692,6 +698,7 @@
 
 func (c *gRPCClient) ExecuteStreamingSql(ctx context.Context, req *spannerpb.ExecuteSqlRequest, opts ...gax.CallOption) (spannerpb.Spanner_ExecuteStreamingSqlClient, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	var resp spannerpb.Spanner_ExecuteStreamingSqlClient
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -712,6 +719,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ExecuteBatchDml[0:len((*c.CallOptions).ExecuteBatchDml):len((*c.CallOptions).ExecuteBatchDml)], opts...)
 	var resp *spannerpb.ExecuteBatchDmlResponse
@@ -733,6 +741,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Read[0:len((*c.CallOptions).Read):len((*c.CallOptions).Read)], opts...)
 	var resp *spannerpb.ResultSet
@@ -749,6 +758,7 @@
 
 func (c *gRPCClient) StreamingRead(ctx context.Context, req *spannerpb.ReadRequest, opts ...gax.CallOption) (spannerpb.Spanner_StreamingReadClient, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	var resp spannerpb.Spanner_StreamingReadClient
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -769,6 +779,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BeginTransaction[0:len((*c.CallOptions).BeginTransaction):len((*c.CallOptions).BeginTransaction)], opts...)
 	var resp *spannerpb.Transaction
@@ -790,6 +801,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Commit[0:len((*c.CallOptions).Commit):len((*c.CallOptions).Commit)], opts...)
 	var resp *spannerpb.CommitResponse
@@ -811,6 +823,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).Rollback[0:len((*c.CallOptions).Rollback):len((*c.CallOptions).Rollback)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -828,6 +841,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PartitionQuery[0:len((*c.CallOptions).PartitionQuery):len((*c.CallOptions).PartitionQuery)], opts...)
 	var resp *spannerpb.PartitionResponse
@@ -849,6 +863,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "session", url.QueryEscape(req.GetSession())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PartitionRead[0:len((*c.CallOptions).PartitionRead):len((*c.CallOptions).PartitionRead)], opts...)
 	var resp *spannerpb.PartitionResponse
diff --git a/spanner/apiv1/version.go b/spanner/apiv1/version.go
new file mode 100644
index 0000000..4b268d4
--- /dev/null
+++ b/spanner/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package spanner
+
+import "cloud.google.com/go/spanner/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/speech/apiv1/doc.go b/speech/apiv1/doc.go
index 5f68a12..c8fbcdb 100644
--- a/speech/apiv1/doc.go
+++ b/speech/apiv1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/speech/apiv1/speech_client.go b/speech/apiv1/speech_client.go
index 5dff9b2..7ffbcf0 100644
--- a/speech/apiv1/speech_client.go
+++ b/speech/apiv1/speech_client.go
@@ -249,7 +249,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/speech/apiv1/version.go b/speech/apiv1/version.go
new file mode 100644
index 0000000..e91afb2
--- /dev/null
+++ b/speech/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package speech
+
+import "cloud.google.com/go/speech/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/speech/apiv1p1beta1/adaptation_client.go b/speech/apiv1p1beta1/adaptation_client.go
index b346f2a..b6ae459 100644
--- a/speech/apiv1p1beta1/adaptation_client.go
+++ b/speech/apiv1p1beta1/adaptation_client.go
@@ -249,7 +249,7 @@
 // use by Google-written clients.
 func (c *adaptationGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -261,6 +261,7 @@
 
 func (c *adaptationGRPCClient) CreatePhraseSet(ctx context.Context, req *speechpb.CreatePhraseSetRequest, opts ...gax.CallOption) (*speechpb.PhraseSet, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreatePhraseSet[0:len((*c.CallOptions).CreatePhraseSet):len((*c.CallOptions).CreatePhraseSet)], opts...)
 	var resp *speechpb.PhraseSet
@@ -277,6 +278,7 @@
 
 func (c *adaptationGRPCClient) GetPhraseSet(ctx context.Context, req *speechpb.GetPhraseSetRequest, opts ...gax.CallOption) (*speechpb.PhraseSet, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetPhraseSet[0:len((*c.CallOptions).GetPhraseSet):len((*c.CallOptions).GetPhraseSet)], opts...)
 	var resp *speechpb.PhraseSet
@@ -293,6 +295,7 @@
 
 func (c *adaptationGRPCClient) ListPhraseSet(ctx context.Context, req *speechpb.ListPhraseSetRequest, opts ...gax.CallOption) *PhraseSetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListPhraseSet[0:len((*c.CallOptions).ListPhraseSet):len((*c.CallOptions).ListPhraseSet)], opts...)
 	it := &PhraseSetIterator{}
@@ -337,6 +340,7 @@
 
 func (c *adaptationGRPCClient) UpdatePhraseSet(ctx context.Context, req *speechpb.UpdatePhraseSetRequest, opts ...gax.CallOption) (*speechpb.PhraseSet, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "phrase_set.name", url.QueryEscape(req.GetPhraseSet().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdatePhraseSet[0:len((*c.CallOptions).UpdatePhraseSet):len((*c.CallOptions).UpdatePhraseSet)], opts...)
 	var resp *speechpb.PhraseSet
@@ -353,6 +357,7 @@
 
 func (c *adaptationGRPCClient) DeletePhraseSet(ctx context.Context, req *speechpb.DeletePhraseSetRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeletePhraseSet[0:len((*c.CallOptions).DeletePhraseSet):len((*c.CallOptions).DeletePhraseSet)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -365,6 +370,7 @@
 
 func (c *adaptationGRPCClient) CreateCustomClass(ctx context.Context, req *speechpb.CreateCustomClassRequest, opts ...gax.CallOption) (*speechpb.CustomClass, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCustomClass[0:len((*c.CallOptions).CreateCustomClass):len((*c.CallOptions).CreateCustomClass)], opts...)
 	var resp *speechpb.CustomClass
@@ -381,6 +387,7 @@
 
 func (c *adaptationGRPCClient) GetCustomClass(ctx context.Context, req *speechpb.GetCustomClassRequest, opts ...gax.CallOption) (*speechpb.CustomClass, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCustomClass[0:len((*c.CallOptions).GetCustomClass):len((*c.CallOptions).GetCustomClass)], opts...)
 	var resp *speechpb.CustomClass
@@ -397,6 +404,7 @@
 
 func (c *adaptationGRPCClient) ListCustomClasses(ctx context.Context, req *speechpb.ListCustomClassesRequest, opts ...gax.CallOption) *CustomClassIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCustomClasses[0:len((*c.CallOptions).ListCustomClasses):len((*c.CallOptions).ListCustomClasses)], opts...)
 	it := &CustomClassIterator{}
@@ -441,6 +449,7 @@
 
 func (c *adaptationGRPCClient) UpdateCustomClass(ctx context.Context, req *speechpb.UpdateCustomClassRequest, opts ...gax.CallOption) (*speechpb.CustomClass, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "custom_class.name", url.QueryEscape(req.GetCustomClass().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCustomClass[0:len((*c.CallOptions).UpdateCustomClass):len((*c.CallOptions).UpdateCustomClass)], opts...)
 	var resp *speechpb.CustomClass
@@ -457,6 +466,7 @@
 
 func (c *adaptationGRPCClient) DeleteCustomClass(ctx context.Context, req *speechpb.DeleteCustomClassRequest, opts ...gax.CallOption) error {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteCustomClass[0:len((*c.CallOptions).DeleteCustomClass):len((*c.CallOptions).DeleteCustomClass)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/speech/apiv1p1beta1/doc.go b/speech/apiv1p1beta1/doc.go
index 894575e..84f8a27 100644
--- a/speech/apiv1p1beta1/doc.go
+++ b/speech/apiv1p1beta1/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/speech/apiv1p1beta1/speech_client.go b/speech/apiv1p1beta1/speech_client.go
index 0db22b9..2e663d1 100644
--- a/speech/apiv1p1beta1/speech_client.go
+++ b/speech/apiv1p1beta1/speech_client.go
@@ -249,7 +249,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/speech/apiv1p1beta1/version.go b/speech/apiv1p1beta1/version.go
new file mode 100644
index 0000000..e91afb2
--- /dev/null
+++ b/speech/apiv1p1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package speech
+
+import "cloud.google.com/go/speech/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/storage/internal/apiv2/doc.go b/storage/internal/apiv2/doc.go
index a683309..d89ce0a 100644
--- a/storage/internal/apiv2/doc.go
+++ b/storage/internal/apiv2/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/storage/internal/apiv2/storage_client.go b/storage/internal/apiv2/storage_client.go
index 8507a0c..1129484 100644
--- a/storage/internal/apiv2/storage_client.go
+++ b/storage/internal/apiv2/storage_client.go
@@ -807,7 +807,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/storage/internal/apiv2/version.go b/storage/internal/apiv2/version.go
new file mode 100644
index 0000000..fd9c945
--- /dev/null
+++ b/storage/internal/apiv2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package storage
+
+import "cloud.google.com/go/storage/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/storagetransfer/apiv1/doc.go b/storagetransfer/apiv1/doc.go
index 6c4420e..387371f 100644
--- a/storagetransfer/apiv1/doc.go
+++ b/storagetransfer/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/storagetransfer/apiv1/storage_transfer_client.go b/storagetransfer/apiv1/storage_transfer_client.go
index 1f620b5..b41eb8b 100644
--- a/storagetransfer/apiv1/storage_transfer_client.go
+++ b/storagetransfer/apiv1/storage_transfer_client.go
@@ -283,7 +283,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -300,6 +300,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGoogleServiceAccount[0:len((*c.CallOptions).GetGoogleServiceAccount):len((*c.CallOptions).GetGoogleServiceAccount)], opts...)
 	var resp *storagetransferpb.GoogleServiceAccount
@@ -341,6 +342,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "job_name", url.QueryEscape(req.GetJobName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTransferJob[0:len((*c.CallOptions).UpdateTransferJob):len((*c.CallOptions).UpdateTransferJob)], opts...)
 	var resp *storagetransferpb.TransferJob
@@ -362,6 +364,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "job_name", url.QueryEscape(req.GetJobName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTransferJob[0:len((*c.CallOptions).GetTransferJob):len((*c.CallOptions).GetTransferJob)], opts...)
 	var resp *storagetransferpb.TransferJob
@@ -426,6 +429,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PauseTransferOperation[0:len((*c.CallOptions).PauseTransferOperation):len((*c.CallOptions).PauseTransferOperation)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -443,6 +447,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResumeTransferOperation[0:len((*c.CallOptions).ResumeTransferOperation):len((*c.CallOptions).ResumeTransferOperation)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -460,6 +465,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "job_name", url.QueryEscape(req.GetJobName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RunTransferJob[0:len((*c.CallOptions).RunTransferJob):len((*c.CallOptions).RunTransferJob)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/storagetransfer/apiv1/version.go b/storagetransfer/apiv1/version.go
new file mode 100644
index 0000000..9a22cea
--- /dev/null
+++ b/storagetransfer/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package storagetransfer
+
+import "cloud.google.com/go/storagetransfer/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/talent/apiv4/company_client.go b/talent/apiv4/company_client.go
index d091981..49d5c7a 100644
--- a/talent/apiv4/company_client.go
+++ b/talent/apiv4/company_client.go
@@ -243,7 +243,7 @@
 // use by Google-written clients.
 func (c *companyGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -260,6 +260,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCompany[0:len((*c.CallOptions).CreateCompany):len((*c.CallOptions).CreateCompany)], opts...)
 	var resp *talentpb.Company
@@ -281,6 +282,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCompany[0:len((*c.CallOptions).GetCompany):len((*c.CallOptions).GetCompany)], opts...)
 	var resp *talentpb.Company
@@ -302,6 +304,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "company.name", url.QueryEscape(req.GetCompany().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCompany[0:len((*c.CallOptions).UpdateCompany):len((*c.CallOptions).UpdateCompany)], opts...)
 	var resp *talentpb.Company
@@ -323,6 +326,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteCompany[0:len((*c.CallOptions).DeleteCompany):len((*c.CallOptions).DeleteCompany)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -335,6 +339,7 @@
 
 func (c *companyGRPCClient) ListCompanies(ctx context.Context, req *talentpb.ListCompaniesRequest, opts ...gax.CallOption) *CompanyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCompanies[0:len((*c.CallOptions).ListCompanies):len((*c.CallOptions).ListCompanies)], opts...)
 	it := &CompanyIterator{}
diff --git a/talent/apiv4/completion_client.go b/talent/apiv4/completion_client.go
index 1f676cc..ffac17d 100644
--- a/talent/apiv4/completion_client.go
+++ b/talent/apiv4/completion_client.go
@@ -187,7 +187,7 @@
 // use by Google-written clients.
 func (c *completionGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -204,6 +204,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tenant", url.QueryEscape(req.GetTenant())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CompleteQuery[0:len((*c.CallOptions).CompleteQuery):len((*c.CallOptions).CompleteQuery)], opts...)
 	var resp *talentpb.CompleteQueryResponse
diff --git a/talent/apiv4/doc.go b/talent/apiv4/doc.go
index 12d64c6..3ad6dd5 100644
--- a/talent/apiv4/doc.go
+++ b/talent/apiv4/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/talent/apiv4/event_client.go b/talent/apiv4/event_client.go
index ea8b932..4938605 100644
--- a/talent/apiv4/event_client.go
+++ b/talent/apiv4/event_client.go
@@ -180,7 +180,7 @@
 // use by Google-written clients.
 func (c *eventGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -197,6 +197,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateClientEvent[0:len((*c.CallOptions).CreateClientEvent):len((*c.CallOptions).CreateClientEvent)], opts...)
 	var resp *talentpb.ClientEvent
diff --git a/talent/apiv4/job_client.go b/talent/apiv4/job_client.go
index 161ce4c..e8dd566 100644
--- a/talent/apiv4/job_client.go
+++ b/talent/apiv4/job_client.go
@@ -350,7 +350,7 @@
 // use by Google-written clients.
 func (c *jobGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -367,6 +367,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateJob[0:len((*c.CallOptions).CreateJob):len((*c.CallOptions).CreateJob)], opts...)
 	var resp *talentpb.Job
@@ -388,6 +389,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCreateJobs[0:len((*c.CallOptions).BatchCreateJobs):len((*c.CallOptions).BatchCreateJobs)], opts...)
 	var resp *longrunningpb.Operation
@@ -411,6 +413,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJob[0:len((*c.CallOptions).GetJob):len((*c.CallOptions).GetJob)], opts...)
 	var resp *talentpb.Job
@@ -432,6 +435,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "job.name", url.QueryEscape(req.GetJob().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateJob[0:len((*c.CallOptions).UpdateJob):len((*c.CallOptions).UpdateJob)], opts...)
 	var resp *talentpb.Job
@@ -453,6 +457,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchUpdateJobs[0:len((*c.CallOptions).BatchUpdateJobs):len((*c.CallOptions).BatchUpdateJobs)], opts...)
 	var resp *longrunningpb.Operation
@@ -476,6 +481,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteJob[0:len((*c.CallOptions).DeleteJob):len((*c.CallOptions).DeleteJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -493,6 +499,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchDeleteJobs[0:len((*c.CallOptions).BatchDeleteJobs):len((*c.CallOptions).BatchDeleteJobs)], opts...)
 	var resp *longrunningpb.Operation
@@ -511,6 +518,7 @@
 
 func (c *jobGRPCClient) ListJobs(ctx context.Context, req *talentpb.ListJobsRequest, opts ...gax.CallOption) *JobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListJobs[0:len((*c.CallOptions).ListJobs):len((*c.CallOptions).ListJobs)], opts...)
 	it := &JobIterator{}
@@ -560,6 +568,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchJobs[0:len((*c.CallOptions).SearchJobs):len((*c.CallOptions).SearchJobs)], opts...)
 	var resp *talentpb.SearchJobsResponse
@@ -581,6 +590,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchJobsForAlert[0:len((*c.CallOptions).SearchJobsForAlert):len((*c.CallOptions).SearchJobsForAlert)], opts...)
 	var resp *talentpb.SearchJobsResponse
diff --git a/talent/apiv4/tenant_client.go b/talent/apiv4/tenant_client.go
index 9ac5c13..eef45a4 100644
--- a/talent/apiv4/tenant_client.go
+++ b/talent/apiv4/tenant_client.go
@@ -242,7 +242,7 @@
 // use by Google-written clients.
 func (c *tenantGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -259,6 +259,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTenant[0:len((*c.CallOptions).CreateTenant):len((*c.CallOptions).CreateTenant)], opts...)
 	var resp *talentpb.Tenant
@@ -280,6 +281,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTenant[0:len((*c.CallOptions).GetTenant):len((*c.CallOptions).GetTenant)], opts...)
 	var resp *talentpb.Tenant
@@ -301,6 +303,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tenant.name", url.QueryEscape(req.GetTenant().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTenant[0:len((*c.CallOptions).UpdateTenant):len((*c.CallOptions).UpdateTenant)], opts...)
 	var resp *talentpb.Tenant
@@ -322,6 +325,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTenant[0:len((*c.CallOptions).DeleteTenant):len((*c.CallOptions).DeleteTenant)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -334,6 +338,7 @@
 
 func (c *tenantGRPCClient) ListTenants(ctx context.Context, req *talentpb.ListTenantsRequest, opts ...gax.CallOption) *TenantIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTenants[0:len((*c.CallOptions).ListTenants):len((*c.CallOptions).ListTenants)], opts...)
 	it := &TenantIterator{}
diff --git a/talent/apiv4/version.go b/talent/apiv4/version.go
new file mode 100644
index 0000000..040be5b
--- /dev/null
+++ b/talent/apiv4/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package talent
+
+import "cloud.google.com/go/talent/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/talent/apiv4beta1/application_client.go b/talent/apiv4beta1/application_client.go
index 19f7010..b9bb619 100644
--- a/talent/apiv4beta1/application_client.go
+++ b/talent/apiv4beta1/application_client.go
@@ -244,7 +244,7 @@
 // use by Google-written clients.
 func (c *applicationGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -261,6 +261,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateApplication[0:len((*c.CallOptions).CreateApplication):len((*c.CallOptions).CreateApplication)], opts...)
 	var resp *talentpb.Application
@@ -282,6 +283,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetApplication[0:len((*c.CallOptions).GetApplication):len((*c.CallOptions).GetApplication)], opts...)
 	var resp *talentpb.Application
@@ -303,6 +305,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "application.name", url.QueryEscape(req.GetApplication().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateApplication[0:len((*c.CallOptions).UpdateApplication):len((*c.CallOptions).UpdateApplication)], opts...)
 	var resp *talentpb.Application
@@ -324,6 +327,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteApplication[0:len((*c.CallOptions).DeleteApplication):len((*c.CallOptions).DeleteApplication)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -336,6 +340,7 @@
 
 func (c *applicationGRPCClient) ListApplications(ctx context.Context, req *talentpb.ListApplicationsRequest, opts ...gax.CallOption) *ApplicationIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListApplications[0:len((*c.CallOptions).ListApplications):len((*c.CallOptions).ListApplications)], opts...)
 	it := &ApplicationIterator{}
diff --git a/talent/apiv4beta1/company_client.go b/talent/apiv4beta1/company_client.go
index d4f22ec..10e77d7 100644
--- a/talent/apiv4beta1/company_client.go
+++ b/talent/apiv4beta1/company_client.go
@@ -243,7 +243,7 @@
 // use by Google-written clients.
 func (c *companyGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -260,6 +260,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCompany[0:len((*c.CallOptions).CreateCompany):len((*c.CallOptions).CreateCompany)], opts...)
 	var resp *talentpb.Company
@@ -281,6 +282,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCompany[0:len((*c.CallOptions).GetCompany):len((*c.CallOptions).GetCompany)], opts...)
 	var resp *talentpb.Company
@@ -302,6 +304,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "company.name", url.QueryEscape(req.GetCompany().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateCompany[0:len((*c.CallOptions).UpdateCompany):len((*c.CallOptions).UpdateCompany)], opts...)
 	var resp *talentpb.Company
@@ -323,6 +326,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteCompany[0:len((*c.CallOptions).DeleteCompany):len((*c.CallOptions).DeleteCompany)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -335,6 +339,7 @@
 
 func (c *companyGRPCClient) ListCompanies(ctx context.Context, req *talentpb.ListCompaniesRequest, opts ...gax.CallOption) *CompanyIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCompanies[0:len((*c.CallOptions).ListCompanies):len((*c.CallOptions).ListCompanies)], opts...)
 	it := &CompanyIterator{}
diff --git a/talent/apiv4beta1/completion_client.go b/talent/apiv4beta1/completion_client.go
index f020f6c..666ccee 100644
--- a/talent/apiv4beta1/completion_client.go
+++ b/talent/apiv4beta1/completion_client.go
@@ -187,7 +187,7 @@
 // use by Google-written clients.
 func (c *completionGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -204,6 +204,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CompleteQuery[0:len((*c.CallOptions).CompleteQuery):len((*c.CallOptions).CompleteQuery)], opts...)
 	var resp *talentpb.CompleteQueryResponse
diff --git a/talent/apiv4beta1/doc.go b/talent/apiv4beta1/doc.go
index 0f78be2..c08e5c1 100644
--- a/talent/apiv4beta1/doc.go
+++ b/talent/apiv4beta1/doc.go
@@ -87,7 +87,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/talent/apiv4beta1/event_client.go b/talent/apiv4beta1/event_client.go
index 99d36f5..5b84cfb 100644
--- a/talent/apiv4beta1/event_client.go
+++ b/talent/apiv4beta1/event_client.go
@@ -180,7 +180,7 @@
 // use by Google-written clients.
 func (c *eventGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -197,6 +197,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateClientEvent[0:len((*c.CallOptions).CreateClientEvent):len((*c.CallOptions).CreateClientEvent)], opts...)
 	var resp *talentpb.ClientEvent
diff --git a/talent/apiv4beta1/job_client.go b/talent/apiv4beta1/job_client.go
index f2d26d9..b3d581c 100644
--- a/talent/apiv4beta1/job_client.go
+++ b/talent/apiv4beta1/job_client.go
@@ -343,7 +343,7 @@
 // use by Google-written clients.
 func (c *jobGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -360,6 +360,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateJob[0:len((*c.CallOptions).CreateJob):len((*c.CallOptions).CreateJob)], opts...)
 	var resp *talentpb.Job
@@ -381,6 +382,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchCreateJobs[0:len((*c.CallOptions).BatchCreateJobs):len((*c.CallOptions).BatchCreateJobs)], opts...)
 	var resp *longrunningpb.Operation
@@ -404,6 +406,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJob[0:len((*c.CallOptions).GetJob):len((*c.CallOptions).GetJob)], opts...)
 	var resp *talentpb.Job
@@ -425,6 +428,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "job.name", url.QueryEscape(req.GetJob().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateJob[0:len((*c.CallOptions).UpdateJob):len((*c.CallOptions).UpdateJob)], opts...)
 	var resp *talentpb.Job
@@ -446,6 +450,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchUpdateJobs[0:len((*c.CallOptions).BatchUpdateJobs):len((*c.CallOptions).BatchUpdateJobs)], opts...)
 	var resp *longrunningpb.Operation
@@ -469,6 +474,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteJob[0:len((*c.CallOptions).DeleteJob):len((*c.CallOptions).DeleteJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -486,6 +492,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchDeleteJobs[0:len((*c.CallOptions).BatchDeleteJobs):len((*c.CallOptions).BatchDeleteJobs)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -498,6 +505,7 @@
 
 func (c *jobGRPCClient) ListJobs(ctx context.Context, req *talentpb.ListJobsRequest, opts ...gax.CallOption) *JobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListJobs[0:len((*c.CallOptions).ListJobs):len((*c.CallOptions).ListJobs)], opts...)
 	it := &JobIterator{}
@@ -547,6 +555,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchJobs[0:len((*c.CallOptions).SearchJobs):len((*c.CallOptions).SearchJobs)], opts...)
 	var resp *talentpb.SearchJobsResponse
@@ -563,6 +572,7 @@
 
 func (c *jobGRPCClient) SearchJobsForAlert(ctx context.Context, req *talentpb.SearchJobsRequest, opts ...gax.CallOption) *SearchJobsResponse_MatchingJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchJobsForAlert[0:len((*c.CallOptions).SearchJobsForAlert):len((*c.CallOptions).SearchJobsForAlert)], opts...)
 	it := &SearchJobsResponse_MatchingJobIterator{}
diff --git a/talent/apiv4beta1/profile_client.go b/talent/apiv4beta1/profile_client.go
index 31de504..ba0e74c 100644
--- a/talent/apiv4beta1/profile_client.go
+++ b/talent/apiv4beta1/profile_client.go
@@ -259,7 +259,7 @@
 // use by Google-written clients.
 func (c *profileGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -271,6 +271,7 @@
 
 func (c *profileGRPCClient) ListProfiles(ctx context.Context, req *talentpb.ListProfilesRequest, opts ...gax.CallOption) *ProfileIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListProfiles[0:len((*c.CallOptions).ListProfiles):len((*c.CallOptions).ListProfiles)], opts...)
 	it := &ProfileIterator{}
@@ -320,6 +321,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateProfile[0:len((*c.CallOptions).CreateProfile):len((*c.CallOptions).CreateProfile)], opts...)
 	var resp *talentpb.Profile
@@ -341,6 +343,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetProfile[0:len((*c.CallOptions).GetProfile):len((*c.CallOptions).GetProfile)], opts...)
 	var resp *talentpb.Profile
@@ -362,6 +365,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "profile.name", url.QueryEscape(req.GetProfile().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateProfile[0:len((*c.CallOptions).UpdateProfile):len((*c.CallOptions).UpdateProfile)], opts...)
 	var resp *talentpb.Profile
@@ -383,6 +387,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteProfile[0:len((*c.CallOptions).DeleteProfile):len((*c.CallOptions).DeleteProfile)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -400,6 +405,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).SearchProfiles[0:len((*c.CallOptions).SearchProfiles):len((*c.CallOptions).SearchProfiles)], opts...)
 	var resp *talentpb.SearchProfilesResponse
diff --git a/talent/apiv4beta1/tenant_client.go b/talent/apiv4beta1/tenant_client.go
index feaaee4..82328b3 100644
--- a/talent/apiv4beta1/tenant_client.go
+++ b/talent/apiv4beta1/tenant_client.go
@@ -242,7 +242,7 @@
 // use by Google-written clients.
 func (c *tenantGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -259,6 +259,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTenant[0:len((*c.CallOptions).CreateTenant):len((*c.CallOptions).CreateTenant)], opts...)
 	var resp *talentpb.Tenant
@@ -280,6 +281,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTenant[0:len((*c.CallOptions).GetTenant):len((*c.CallOptions).GetTenant)], opts...)
 	var resp *talentpb.Tenant
@@ -301,6 +303,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "tenant.name", url.QueryEscape(req.GetTenant().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTenant[0:len((*c.CallOptions).UpdateTenant):len((*c.CallOptions).UpdateTenant)], opts...)
 	var resp *talentpb.Tenant
@@ -322,6 +325,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTenant[0:len((*c.CallOptions).DeleteTenant):len((*c.CallOptions).DeleteTenant)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -334,6 +338,7 @@
 
 func (c *tenantGRPCClient) ListTenants(ctx context.Context, req *talentpb.ListTenantsRequest, opts ...gax.CallOption) *TenantIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTenants[0:len((*c.CallOptions).ListTenants):len((*c.CallOptions).ListTenants)], opts...)
 	it := &TenantIterator{}
diff --git a/talent/apiv4beta1/version.go b/talent/apiv4beta1/version.go
new file mode 100644
index 0000000..040be5b
--- /dev/null
+++ b/talent/apiv4beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package talent
+
+import "cloud.google.com/go/talent/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/texttospeech/apiv1/doc.go b/texttospeech/apiv1/doc.go
index 28f1c1b..1feff9f 100644
--- a/texttospeech/apiv1/doc.go
+++ b/texttospeech/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/texttospeech/apiv1/text_to_speech_client.go b/texttospeech/apiv1/text_to_speech_client.go
index 45ee8ce..54c6c23 100644
--- a/texttospeech/apiv1/text_to_speech_client.go
+++ b/texttospeech/apiv1/text_to_speech_client.go
@@ -204,7 +204,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/texttospeech/apiv1/version.go b/texttospeech/apiv1/version.go
new file mode 100644
index 0000000..559b98d
--- /dev/null
+++ b/texttospeech/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package texttospeech
+
+import "cloud.google.com/go/texttospeech/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/tpu/apiv1/doc.go b/tpu/apiv1/doc.go
index fedc3e0..d867f2c 100644
--- a/tpu/apiv1/doc.go
+++ b/tpu/apiv1/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/tpu/apiv1/tpu_client.go b/tpu/apiv1/tpu_client.go
index 59b760f..941e66a 100644
--- a/tpu/apiv1/tpu_client.go
+++ b/tpu/apiv1/tpu_client.go
@@ -319,7 +319,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -331,6 +331,7 @@
 
 func (c *gRPCClient) ListNodes(ctx context.Context, req *tpupb.ListNodesRequest, opts ...gax.CallOption) *NodeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListNodes[0:len((*c.CallOptions).ListNodes):len((*c.CallOptions).ListNodes)], opts...)
 	it := &NodeIterator{}
@@ -380,6 +381,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetNode[0:len((*c.CallOptions).GetNode):len((*c.CallOptions).GetNode)], opts...)
 	var resp *tpupb.Node
@@ -401,6 +403,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateNode[0:len((*c.CallOptions).CreateNode):len((*c.CallOptions).CreateNode)], opts...)
 	var resp *longrunningpb.Operation
@@ -424,6 +427,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteNode[0:len((*c.CallOptions).DeleteNode):len((*c.CallOptions).DeleteNode)], opts...)
 	var resp *longrunningpb.Operation
@@ -447,6 +451,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ReimageNode[0:len((*c.CallOptions).ReimageNode):len((*c.CallOptions).ReimageNode)], opts...)
 	var resp *longrunningpb.Operation
@@ -470,6 +475,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StopNode[0:len((*c.CallOptions).StopNode):len((*c.CallOptions).StopNode)], opts...)
 	var resp *longrunningpb.Operation
@@ -493,6 +499,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartNode[0:len((*c.CallOptions).StartNode):len((*c.CallOptions).StartNode)], opts...)
 	var resp *longrunningpb.Operation
@@ -511,6 +518,7 @@
 
 func (c *gRPCClient) ListTensorFlowVersions(ctx context.Context, req *tpupb.ListTensorFlowVersionsRequest, opts ...gax.CallOption) *TensorFlowVersionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTensorFlowVersions[0:len((*c.CallOptions).ListTensorFlowVersions):len((*c.CallOptions).ListTensorFlowVersions)], opts...)
 	it := &TensorFlowVersionIterator{}
@@ -560,6 +568,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTensorFlowVersion[0:len((*c.CallOptions).GetTensorFlowVersion):len((*c.CallOptions).GetTensorFlowVersion)], opts...)
 	var resp *tpupb.TensorFlowVersion
@@ -576,6 +585,7 @@
 
 func (c *gRPCClient) ListAcceleratorTypes(ctx context.Context, req *tpupb.ListAcceleratorTypesRequest, opts ...gax.CallOption) *AcceleratorTypeIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListAcceleratorTypes[0:len((*c.CallOptions).ListAcceleratorTypes):len((*c.CallOptions).ListAcceleratorTypes)], opts...)
 	it := &AcceleratorTypeIterator{}
@@ -625,6 +635,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetAcceleratorType[0:len((*c.CallOptions).GetAcceleratorType):len((*c.CallOptions).GetAcceleratorType)], opts...)
 	var resp *tpupb.AcceleratorType
diff --git a/tpu/apiv1/version.go b/tpu/apiv1/version.go
new file mode 100644
index 0000000..3d9a7ba
--- /dev/null
+++ b/tpu/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package tpu
+
+import "cloud.google.com/go/tpu/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/trace/apiv1/doc.go b/trace/apiv1/doc.go
index 3c44201..de823ec 100644
--- a/trace/apiv1/doc.go
+++ b/trace/apiv1/doc.go
@@ -94,7 +94,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/trace/apiv1/trace_client.go b/trace/apiv1/trace_client.go
index 3d9e3a5..910acde 100644
--- a/trace/apiv1/trace_client.go
+++ b/trace/apiv1/trace_client.go
@@ -238,7 +238,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -250,6 +250,7 @@
 
 func (c *gRPCClient) ListTraces(ctx context.Context, req *cloudtracepb.ListTracesRequest, opts ...gax.CallOption) *TraceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTraces[0:len((*c.CallOptions).ListTraces):len((*c.CallOptions).ListTraces)], opts...)
 	it := &TraceIterator{}
@@ -299,6 +300,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v&%s=%v", "project_id", url.QueryEscape(req.GetProjectId()), "trace_id", url.QueryEscape(req.GetTraceId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTrace[0:len((*c.CallOptions).GetTrace):len((*c.CallOptions).GetTrace)], opts...)
 	var resp *cloudtracepb.Trace
@@ -320,6 +322,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "project_id", url.QueryEscape(req.GetProjectId())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PatchTraces[0:len((*c.CallOptions).PatchTraces):len((*c.CallOptions).PatchTraces)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/trace/apiv1/version.go b/trace/apiv1/version.go
new file mode 100644
index 0000000..b52392b
--- /dev/null
+++ b/trace/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package trace
+
+import "cloud.google.com/go/trace/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/trace/apiv2/doc.go b/trace/apiv2/doc.go
index 2fc67c0..b58f874 100644
--- a/trace/apiv2/doc.go
+++ b/trace/apiv2/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/trace/apiv2/trace_client.go b/trace/apiv2/trace_client.go
index 0a90ae4..b5b265e 100644
--- a/trace/apiv2/trace_client.go
+++ b/trace/apiv2/trace_client.go
@@ -203,7 +203,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -220,6 +220,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchWriteSpans[0:len((*c.CallOptions).BatchWriteSpans):len((*c.CallOptions).BatchWriteSpans)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -237,6 +238,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSpan[0:len((*c.CallOptions).CreateSpan):len((*c.CallOptions).CreateSpan)], opts...)
 	var resp *cloudtracepb.Span
diff --git a/trace/apiv2/version.go b/trace/apiv2/version.go
new file mode 100644
index 0000000..b52392b
--- /dev/null
+++ b/trace/apiv2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package trace
+
+import "cloud.google.com/go/trace/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/translate/apiv3/doc.go b/translate/apiv3/doc.go
index 925746b..4ef7f91 100644
--- a/translate/apiv3/doc.go
+++ b/translate/apiv3/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/translate/apiv3/translation_client.go b/translate/apiv3/translation_client.go
index 46b4797..819ec77 100644
--- a/translate/apiv3/translation_client.go
+++ b/translate/apiv3/translation_client.go
@@ -362,7 +362,7 @@
 // use by Google-written clients.
 func (c *translationGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -379,6 +379,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TranslateText[0:len((*c.CallOptions).TranslateText):len((*c.CallOptions).TranslateText)], opts...)
 	var resp *translatepb.TranslateTextResponse
@@ -400,6 +401,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DetectLanguage[0:len((*c.CallOptions).DetectLanguage):len((*c.CallOptions).DetectLanguage)], opts...)
 	var resp *translatepb.DetectLanguageResponse
@@ -421,6 +423,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSupportedLanguages[0:len((*c.CallOptions).GetSupportedLanguages):len((*c.CallOptions).GetSupportedLanguages)], opts...)
 	var resp *translatepb.SupportedLanguages
@@ -442,6 +445,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).TranslateDocument[0:len((*c.CallOptions).TranslateDocument):len((*c.CallOptions).TranslateDocument)], opts...)
 	var resp *translatepb.TranslateDocumentResponse
@@ -463,6 +467,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchTranslateText[0:len((*c.CallOptions).BatchTranslateText):len((*c.CallOptions).BatchTranslateText)], opts...)
 	var resp *longrunningpb.Operation
@@ -486,6 +491,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchTranslateDocument[0:len((*c.CallOptions).BatchTranslateDocument):len((*c.CallOptions).BatchTranslateDocument)], opts...)
 	var resp *longrunningpb.Operation
@@ -509,6 +515,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGlossary[0:len((*c.CallOptions).CreateGlossary):len((*c.CallOptions).CreateGlossary)], opts...)
 	var resp *longrunningpb.Operation
@@ -527,6 +534,7 @@
 
 func (c *translationGRPCClient) ListGlossaries(ctx context.Context, req *translatepb.ListGlossariesRequest, opts ...gax.CallOption) *GlossaryIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGlossaries[0:len((*c.CallOptions).ListGlossaries):len((*c.CallOptions).ListGlossaries)], opts...)
 	it := &GlossaryIterator{}
@@ -576,6 +584,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGlossary[0:len((*c.CallOptions).GetGlossary):len((*c.CallOptions).GetGlossary)], opts...)
 	var resp *translatepb.Glossary
@@ -597,6 +606,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGlossary[0:len((*c.CallOptions).DeleteGlossary):len((*c.CallOptions).DeleteGlossary)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/translate/apiv3/version.go b/translate/apiv3/version.go
new file mode 100644
index 0000000..02208e5
--- /dev/null
+++ b/translate/apiv3/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package translate
+
+import "cloud.google.com/go/translate/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/video/livestream/apiv1/doc.go b/video/livestream/apiv1/doc.go
index c9c3ec9..8adb59c 100644
--- a/video/livestream/apiv1/doc.go
+++ b/video/livestream/apiv1/doc.go
@@ -89,7 +89,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/video/livestream/apiv1/livestream_client.go b/video/livestream/apiv1/livestream_client.go
index 8e139fb..59cd414 100644
--- a/video/livestream/apiv1/livestream_client.go
+++ b/video/livestream/apiv1/livestream_client.go
@@ -448,7 +448,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -465,6 +465,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateChannel[0:len((*c.CallOptions).CreateChannel):len((*c.CallOptions).CreateChannel)], opts...)
 	var resp *longrunningpb.Operation
@@ -483,6 +484,7 @@
 
 func (c *gRPCClient) ListChannels(ctx context.Context, req *livestreampb.ListChannelsRequest, opts ...gax.CallOption) *ChannelIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListChannels[0:len((*c.CallOptions).ListChannels):len((*c.CallOptions).ListChannels)], opts...)
 	it := &ChannelIterator{}
@@ -532,6 +534,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetChannel[0:len((*c.CallOptions).GetChannel):len((*c.CallOptions).GetChannel)], opts...)
 	var resp *livestreampb.Channel
@@ -553,6 +556,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteChannel[0:len((*c.CallOptions).DeleteChannel):len((*c.CallOptions).DeleteChannel)], opts...)
 	var resp *longrunningpb.Operation
@@ -576,6 +580,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "channel.name", url.QueryEscape(req.GetChannel().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateChannel[0:len((*c.CallOptions).UpdateChannel):len((*c.CallOptions).UpdateChannel)], opts...)
 	var resp *longrunningpb.Operation
@@ -599,6 +604,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartChannel[0:len((*c.CallOptions).StartChannel):len((*c.CallOptions).StartChannel)], opts...)
 	var resp *longrunningpb.Operation
@@ -622,6 +628,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StopChannel[0:len((*c.CallOptions).StopChannel):len((*c.CallOptions).StopChannel)], opts...)
 	var resp *longrunningpb.Operation
@@ -645,6 +652,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateInput[0:len((*c.CallOptions).CreateInput):len((*c.CallOptions).CreateInput)], opts...)
 	var resp *longrunningpb.Operation
@@ -663,6 +671,7 @@
 
 func (c *gRPCClient) ListInputs(ctx context.Context, req *livestreampb.ListInputsRequest, opts ...gax.CallOption) *InputIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListInputs[0:len((*c.CallOptions).ListInputs):len((*c.CallOptions).ListInputs)], opts...)
 	it := &InputIterator{}
@@ -712,6 +721,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetInput[0:len((*c.CallOptions).GetInput):len((*c.CallOptions).GetInput)], opts...)
 	var resp *livestreampb.Input
@@ -733,6 +743,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteInput[0:len((*c.CallOptions).DeleteInput):len((*c.CallOptions).DeleteInput)], opts...)
 	var resp *longrunningpb.Operation
@@ -756,6 +767,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "input.name", url.QueryEscape(req.GetInput().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateInput[0:len((*c.CallOptions).UpdateInput):len((*c.CallOptions).UpdateInput)], opts...)
 	var resp *longrunningpb.Operation
@@ -779,6 +791,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateEvent[0:len((*c.CallOptions).CreateEvent):len((*c.CallOptions).CreateEvent)], opts...)
 	var resp *livestreampb.Event
@@ -795,6 +808,7 @@
 
 func (c *gRPCClient) ListEvents(ctx context.Context, req *livestreampb.ListEventsRequest, opts ...gax.CallOption) *EventIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListEvents[0:len((*c.CallOptions).ListEvents):len((*c.CallOptions).ListEvents)], opts...)
 	it := &EventIterator{}
@@ -844,6 +858,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetEvent[0:len((*c.CallOptions).GetEvent):len((*c.CallOptions).GetEvent)], opts...)
 	var resp *livestreampb.Event
@@ -865,6 +880,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteEvent[0:len((*c.CallOptions).DeleteEvent):len((*c.CallOptions).DeleteEvent)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/video/livestream/apiv1/version.go b/video/livestream/apiv1/version.go
new file mode 100644
index 0000000..dec7611
--- /dev/null
+++ b/video/livestream/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package livestream
+
+import "cloud.google.com/go/video/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/video/transcoder/apiv1/doc.go b/video/transcoder/apiv1/doc.go
index 23426ac..4d8d3fa 100644
--- a/video/transcoder/apiv1/doc.go
+++ b/video/transcoder/apiv1/doc.go
@@ -85,7 +85,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/video/transcoder/apiv1/transcoder_client.go b/video/transcoder/apiv1/transcoder_client.go
index ff5a54b..3d5f467 100644
--- a/video/transcoder/apiv1/transcoder_client.go
+++ b/video/transcoder/apiv1/transcoder_client.go
@@ -242,7 +242,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -259,6 +259,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateJob[0:len((*c.CallOptions).CreateJob):len((*c.CallOptions).CreateJob)], opts...)
 	var resp *transcoderpb.Job
@@ -275,6 +276,7 @@
 
 func (c *gRPCClient) ListJobs(ctx context.Context, req *transcoderpb.ListJobsRequest, opts ...gax.CallOption) *JobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListJobs[0:len((*c.CallOptions).ListJobs):len((*c.CallOptions).ListJobs)], opts...)
 	it := &JobIterator{}
@@ -324,6 +326,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJob[0:len((*c.CallOptions).GetJob):len((*c.CallOptions).GetJob)], opts...)
 	var resp *transcoderpb.Job
@@ -345,6 +348,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteJob[0:len((*c.CallOptions).DeleteJob):len((*c.CallOptions).DeleteJob)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -362,6 +366,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateJobTemplate[0:len((*c.CallOptions).CreateJobTemplate):len((*c.CallOptions).CreateJobTemplate)], opts...)
 	var resp *transcoderpb.JobTemplate
@@ -378,6 +383,7 @@
 
 func (c *gRPCClient) ListJobTemplates(ctx context.Context, req *transcoderpb.ListJobTemplatesRequest, opts ...gax.CallOption) *JobTemplateIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListJobTemplates[0:len((*c.CallOptions).ListJobTemplates):len((*c.CallOptions).ListJobTemplates)], opts...)
 	it := &JobTemplateIterator{}
@@ -427,6 +433,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetJobTemplate[0:len((*c.CallOptions).GetJobTemplate):len((*c.CallOptions).GetJobTemplate)], opts...)
 	var resp *transcoderpb.JobTemplate
@@ -448,6 +455,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteJobTemplate[0:len((*c.CallOptions).DeleteJobTemplate):len((*c.CallOptions).DeleteJobTemplate)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
diff --git a/video/transcoder/apiv1/version.go b/video/transcoder/apiv1/version.go
new file mode 100644
index 0000000..1a88d48
--- /dev/null
+++ b/video/transcoder/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package transcoder
+
+import "cloud.google.com/go/video/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/videointelligence/apiv1/doc.go b/videointelligence/apiv1/doc.go
index 23b0d40..5b88357 100644
--- a/videointelligence/apiv1/doc.go
+++ b/videointelligence/apiv1/doc.go
@@ -91,7 +91,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/videointelligence/apiv1/version.go b/videointelligence/apiv1/version.go
new file mode 100644
index 0000000..6b1c98b
--- /dev/null
+++ b/videointelligence/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package videointelligence
+
+import "cloud.google.com/go/videointelligence/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/videointelligence/apiv1/video_intelligence_client.go b/videointelligence/apiv1/video_intelligence_client.go
index c7fa1bf..6ca5e76 100644
--- a/videointelligence/apiv1/video_intelligence_client.go
+++ b/videointelligence/apiv1/video_intelligence_client.go
@@ -218,7 +218,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/videointelligence/apiv1beta2/doc.go b/videointelligence/apiv1beta2/doc.go
index 9e77f89..2c50495 100644
--- a/videointelligence/apiv1beta2/doc.go
+++ b/videointelligence/apiv1beta2/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/videointelligence/apiv1beta2/version.go b/videointelligence/apiv1beta2/version.go
new file mode 100644
index 0000000..6b1c98b
--- /dev/null
+++ b/videointelligence/apiv1beta2/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package videointelligence
+
+import "cloud.google.com/go/videointelligence/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/videointelligence/apiv1beta2/video_intelligence_client.go b/videointelligence/apiv1beta2/video_intelligence_client.go
index 3168d8c..f9b953d 100644
--- a/videointelligence/apiv1beta2/video_intelligence_client.go
+++ b/videointelligence/apiv1beta2/video_intelligence_client.go
@@ -218,7 +218,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/vision/apiv1/doc.go b/vision/apiv1/doc.go
index 894e658..ea85fe6 100644
--- a/vision/apiv1/doc.go
+++ b/vision/apiv1/doc.go
@@ -86,7 +86,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/vision/apiv1/image_annotator_client.go b/vision/apiv1/image_annotator_client.go
index 712bd3e..ed0e6c6 100644
--- a/vision/apiv1/image_annotator_client.go
+++ b/vision/apiv1/image_annotator_client.go
@@ -304,7 +304,7 @@
 // use by Google-written clients.
 func (c *imageAnnotatorGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -321,6 +321,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchAnnotateImages[0:len((*c.CallOptions).BatchAnnotateImages):len((*c.CallOptions).BatchAnnotateImages)], opts...)
 	var resp *visionpb.BatchAnnotateImagesResponse
@@ -342,6 +343,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).BatchAnnotateFiles[0:len((*c.CallOptions).BatchAnnotateFiles):len((*c.CallOptions).BatchAnnotateFiles)], opts...)
 	var resp *visionpb.BatchAnnotateFilesResponse
@@ -363,6 +365,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AsyncBatchAnnotateImages[0:len((*c.CallOptions).AsyncBatchAnnotateImages):len((*c.CallOptions).AsyncBatchAnnotateImages)], opts...)
 	var resp *longrunningpb.Operation
@@ -386,6 +389,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AsyncBatchAnnotateFiles[0:len((*c.CallOptions).AsyncBatchAnnotateFiles):len((*c.CallOptions).AsyncBatchAnnotateFiles)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/vision/apiv1/product_search_client.go b/vision/apiv1/product_search_client.go
index a5fb7d5..cd1dae6 100644
--- a/vision/apiv1/product_search_client.go
+++ b/vision/apiv1/product_search_client.go
@@ -726,7 +726,7 @@
 // use by Google-written clients.
 func (c *productSearchGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -743,6 +743,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateProductSet[0:len((*c.CallOptions).CreateProductSet):len((*c.CallOptions).CreateProductSet)], opts...)
 	var resp *visionpb.ProductSet
@@ -759,6 +760,7 @@
 
 func (c *productSearchGRPCClient) ListProductSets(ctx context.Context, req *visionpb.ListProductSetsRequest, opts ...gax.CallOption) *ProductSetIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListProductSets[0:len((*c.CallOptions).ListProductSets):len((*c.CallOptions).ListProductSets)], opts...)
 	it := &ProductSetIterator{}
@@ -808,6 +810,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetProductSet[0:len((*c.CallOptions).GetProductSet):len((*c.CallOptions).GetProductSet)], opts...)
 	var resp *visionpb.ProductSet
@@ -829,6 +832,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "product_set.name", url.QueryEscape(req.GetProductSet().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateProductSet[0:len((*c.CallOptions).UpdateProductSet):len((*c.CallOptions).UpdateProductSet)], opts...)
 	var resp *visionpb.ProductSet
@@ -850,6 +854,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteProductSet[0:len((*c.CallOptions).DeleteProductSet):len((*c.CallOptions).DeleteProductSet)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -867,6 +872,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateProduct[0:len((*c.CallOptions).CreateProduct):len((*c.CallOptions).CreateProduct)], opts...)
 	var resp *visionpb.Product
@@ -883,6 +889,7 @@
 
 func (c *productSearchGRPCClient) ListProducts(ctx context.Context, req *visionpb.ListProductsRequest, opts ...gax.CallOption) *ProductIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListProducts[0:len((*c.CallOptions).ListProducts):len((*c.CallOptions).ListProducts)], opts...)
 	it := &ProductIterator{}
@@ -932,6 +939,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetProduct[0:len((*c.CallOptions).GetProduct):len((*c.CallOptions).GetProduct)], opts...)
 	var resp *visionpb.Product
@@ -953,6 +961,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "product.name", url.QueryEscape(req.GetProduct().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateProduct[0:len((*c.CallOptions).UpdateProduct):len((*c.CallOptions).UpdateProduct)], opts...)
 	var resp *visionpb.Product
@@ -974,6 +983,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteProduct[0:len((*c.CallOptions).DeleteProduct):len((*c.CallOptions).DeleteProduct)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -991,6 +1001,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateReferenceImage[0:len((*c.CallOptions).CreateReferenceImage):len((*c.CallOptions).CreateReferenceImage)], opts...)
 	var resp *visionpb.ReferenceImage
@@ -1012,6 +1023,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteReferenceImage[0:len((*c.CallOptions).DeleteReferenceImage):len((*c.CallOptions).DeleteReferenceImage)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1024,6 +1036,7 @@
 
 func (c *productSearchGRPCClient) ListReferenceImages(ctx context.Context, req *visionpb.ListReferenceImagesRequest, opts ...gax.CallOption) *ReferenceImageIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListReferenceImages[0:len((*c.CallOptions).ListReferenceImages):len((*c.CallOptions).ListReferenceImages)], opts...)
 	it := &ReferenceImageIterator{}
@@ -1073,6 +1086,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetReferenceImage[0:len((*c.CallOptions).GetReferenceImage):len((*c.CallOptions).GetReferenceImage)], opts...)
 	var resp *visionpb.ReferenceImage
@@ -1094,6 +1108,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AddProductToProductSet[0:len((*c.CallOptions).AddProductToProductSet):len((*c.CallOptions).AddProductToProductSet)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1111,6 +1126,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RemoveProductFromProductSet[0:len((*c.CallOptions).RemoveProductFromProductSet):len((*c.CallOptions).RemoveProductFromProductSet)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -1123,6 +1139,7 @@
 
 func (c *productSearchGRPCClient) ListProductsInProductSet(ctx context.Context, req *visionpb.ListProductsInProductSetRequest, opts ...gax.CallOption) *ProductIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListProductsInProductSet[0:len((*c.CallOptions).ListProductsInProductSet):len((*c.CallOptions).ListProductsInProductSet)], opts...)
 	it := &ProductIterator{}
@@ -1172,6 +1189,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ImportProductSets[0:len((*c.CallOptions).ImportProductSets):len((*c.CallOptions).ImportProductSets)], opts...)
 	var resp *longrunningpb.Operation
@@ -1195,6 +1213,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PurgeProducts[0:len((*c.CallOptions).PurgeProducts):len((*c.CallOptions).PurgeProducts)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/vision/apiv1/version.go b/vision/apiv1/version.go
new file mode 100644
index 0000000..30eb697
--- /dev/null
+++ b/vision/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package vision
+
+import "cloud.google.com/go/vision/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/vision/apiv1p1beta1/doc.go b/vision/apiv1p1beta1/doc.go
index 09ab2da..663648d 100644
--- a/vision/apiv1p1beta1/doc.go
+++ b/vision/apiv1p1beta1/doc.go
@@ -88,7 +88,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/vision/apiv1p1beta1/image_annotator_client.go b/vision/apiv1p1beta1/image_annotator_client.go
index 0b50af2..d6a23c6 100644
--- a/vision/apiv1p1beta1/image_annotator_client.go
+++ b/vision/apiv1p1beta1/image_annotator_client.go
@@ -188,7 +188,7 @@
 // use by Google-written clients.
 func (c *imageAnnotatorGRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/vision/apiv1p1beta1/version.go b/vision/apiv1p1beta1/version.go
new file mode 100644
index 0000000..30eb697
--- /dev/null
+++ b/vision/apiv1p1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package vision
+
+import "cloud.google.com/go/vision/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/vmmigration/apiv1/doc.go b/vmmigration/apiv1/doc.go
index 1be1890..7fcef0b 100644
--- a/vmmigration/apiv1/doc.go
+++ b/vmmigration/apiv1/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/vmmigration/apiv1/version.go b/vmmigration/apiv1/version.go
new file mode 100644
index 0000000..c32be2b
--- /dev/null
+++ b/vmmigration/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package vmmigration
+
+import "cloud.google.com/go/vmmigration/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/vmmigration/apiv1/vm_migration_client.go b/vmmigration/apiv1/vm_migration_client.go
index c4bb16e..1acf93f 100644
--- a/vmmigration/apiv1/vm_migration_client.go
+++ b/vmmigration/apiv1/vm_migration_client.go
@@ -746,7 +746,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -758,6 +758,7 @@
 
 func (c *gRPCClient) ListSources(ctx context.Context, req *vmmigrationpb.ListSourcesRequest, opts ...gax.CallOption) *SourceIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListSources[0:len((*c.CallOptions).ListSources):len((*c.CallOptions).ListSources)], opts...)
 	it := &SourceIterator{}
@@ -807,6 +808,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetSource[0:len((*c.CallOptions).GetSource):len((*c.CallOptions).GetSource)], opts...)
 	var resp *vmmigrationpb.Source
@@ -828,6 +830,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSource[0:len((*c.CallOptions).CreateSource):len((*c.CallOptions).CreateSource)], opts...)
 	var resp *longrunningpb.Operation
@@ -851,6 +854,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "source.name", url.QueryEscape(req.GetSource().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateSource[0:len((*c.CallOptions).UpdateSource):len((*c.CallOptions).UpdateSource)], opts...)
 	var resp *longrunningpb.Operation
@@ -874,6 +878,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteSource[0:len((*c.CallOptions).DeleteSource):len((*c.CallOptions).DeleteSource)], opts...)
 	var resp *longrunningpb.Operation
@@ -897,6 +902,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "source", url.QueryEscape(req.GetSource())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FetchInventory[0:len((*c.CallOptions).FetchInventory):len((*c.CallOptions).FetchInventory)], opts...)
 	var resp *vmmigrationpb.FetchInventoryResponse
@@ -913,6 +919,7 @@
 
 func (c *gRPCClient) ListUtilizationReports(ctx context.Context, req *vmmigrationpb.ListUtilizationReportsRequest, opts ...gax.CallOption) *UtilizationReportIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListUtilizationReports[0:len((*c.CallOptions).ListUtilizationReports):len((*c.CallOptions).ListUtilizationReports)], opts...)
 	it := &UtilizationReportIterator{}
@@ -962,6 +969,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetUtilizationReport[0:len((*c.CallOptions).GetUtilizationReport):len((*c.CallOptions).GetUtilizationReport)], opts...)
 	var resp *vmmigrationpb.UtilizationReport
@@ -983,6 +991,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateUtilizationReport[0:len((*c.CallOptions).CreateUtilizationReport):len((*c.CallOptions).CreateUtilizationReport)], opts...)
 	var resp *longrunningpb.Operation
@@ -1006,6 +1015,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteUtilizationReport[0:len((*c.CallOptions).DeleteUtilizationReport):len((*c.CallOptions).DeleteUtilizationReport)], opts...)
 	var resp *longrunningpb.Operation
@@ -1024,6 +1034,7 @@
 
 func (c *gRPCClient) ListDatacenterConnectors(ctx context.Context, req *vmmigrationpb.ListDatacenterConnectorsRequest, opts ...gax.CallOption) *DatacenterConnectorIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListDatacenterConnectors[0:len((*c.CallOptions).ListDatacenterConnectors):len((*c.CallOptions).ListDatacenterConnectors)], opts...)
 	it := &DatacenterConnectorIterator{}
@@ -1073,6 +1084,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetDatacenterConnector[0:len((*c.CallOptions).GetDatacenterConnector):len((*c.CallOptions).GetDatacenterConnector)], opts...)
 	var resp *vmmigrationpb.DatacenterConnector
@@ -1094,6 +1106,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateDatacenterConnector[0:len((*c.CallOptions).CreateDatacenterConnector):len((*c.CallOptions).CreateDatacenterConnector)], opts...)
 	var resp *longrunningpb.Operation
@@ -1117,6 +1130,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteDatacenterConnector[0:len((*c.CallOptions).DeleteDatacenterConnector):len((*c.CallOptions).DeleteDatacenterConnector)], opts...)
 	var resp *longrunningpb.Operation
@@ -1140,6 +1154,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateMigratingVm[0:len((*c.CallOptions).CreateMigratingVm):len((*c.CallOptions).CreateMigratingVm)], opts...)
 	var resp *longrunningpb.Operation
@@ -1158,6 +1173,7 @@
 
 func (c *gRPCClient) ListMigratingVms(ctx context.Context, req *vmmigrationpb.ListMigratingVmsRequest, opts ...gax.CallOption) *MigratingVmIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListMigratingVms[0:len((*c.CallOptions).ListMigratingVms):len((*c.CallOptions).ListMigratingVms)], opts...)
 	it := &MigratingVmIterator{}
@@ -1207,6 +1223,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetMigratingVm[0:len((*c.CallOptions).GetMigratingVm):len((*c.CallOptions).GetMigratingVm)], opts...)
 	var resp *vmmigrationpb.MigratingVm
@@ -1228,6 +1245,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "migrating_vm.name", url.QueryEscape(req.GetMigratingVm().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateMigratingVm[0:len((*c.CallOptions).UpdateMigratingVm):len((*c.CallOptions).UpdateMigratingVm)], opts...)
 	var resp *longrunningpb.Operation
@@ -1251,6 +1269,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteMigratingVm[0:len((*c.CallOptions).DeleteMigratingVm):len((*c.CallOptions).DeleteMigratingVm)], opts...)
 	var resp *longrunningpb.Operation
@@ -1274,6 +1293,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "migrating_vm", url.QueryEscape(req.GetMigratingVm())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartMigration[0:len((*c.CallOptions).StartMigration):len((*c.CallOptions).StartMigration)], opts...)
 	var resp *longrunningpb.Operation
@@ -1297,6 +1317,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "migrating_vm", url.QueryEscape(req.GetMigratingVm())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ResumeMigration[0:len((*c.CallOptions).ResumeMigration):len((*c.CallOptions).ResumeMigration)], opts...)
 	var resp *longrunningpb.Operation
@@ -1320,6 +1341,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "migrating_vm", url.QueryEscape(req.GetMigratingVm())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).PauseMigration[0:len((*c.CallOptions).PauseMigration):len((*c.CallOptions).PauseMigration)], opts...)
 	var resp *longrunningpb.Operation
@@ -1343,6 +1365,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "migrating_vm", url.QueryEscape(req.GetMigratingVm())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).FinalizeMigration[0:len((*c.CallOptions).FinalizeMigration):len((*c.CallOptions).FinalizeMigration)], opts...)
 	var resp *longrunningpb.Operation
@@ -1366,6 +1389,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCloneJob[0:len((*c.CallOptions).CreateCloneJob):len((*c.CallOptions).CreateCloneJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -1389,6 +1413,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelCloneJob[0:len((*c.CallOptions).CancelCloneJob):len((*c.CallOptions).CancelCloneJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -1407,6 +1432,7 @@
 
 func (c *gRPCClient) ListCloneJobs(ctx context.Context, req *vmmigrationpb.ListCloneJobsRequest, opts ...gax.CallOption) *CloneJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCloneJobs[0:len((*c.CallOptions).ListCloneJobs):len((*c.CallOptions).ListCloneJobs)], opts...)
 	it := &CloneJobIterator{}
@@ -1456,6 +1482,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCloneJob[0:len((*c.CallOptions).GetCloneJob):len((*c.CallOptions).GetCloneJob)], opts...)
 	var resp *vmmigrationpb.CloneJob
@@ -1477,6 +1504,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateCutoverJob[0:len((*c.CallOptions).CreateCutoverJob):len((*c.CallOptions).CreateCutoverJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -1500,6 +1528,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelCutoverJob[0:len((*c.CallOptions).CancelCutoverJob):len((*c.CallOptions).CancelCutoverJob)], opts...)
 	var resp *longrunningpb.Operation
@@ -1518,6 +1547,7 @@
 
 func (c *gRPCClient) ListCutoverJobs(ctx context.Context, req *vmmigrationpb.ListCutoverJobsRequest, opts ...gax.CallOption) *CutoverJobIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCutoverJobs[0:len((*c.CallOptions).ListCutoverJobs):len((*c.CallOptions).ListCutoverJobs)], opts...)
 	it := &CutoverJobIterator{}
@@ -1567,6 +1597,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetCutoverJob[0:len((*c.CallOptions).GetCutoverJob):len((*c.CallOptions).GetCutoverJob)], opts...)
 	var resp *vmmigrationpb.CutoverJob
@@ -1583,6 +1614,7 @@
 
 func (c *gRPCClient) ListGroups(ctx context.Context, req *vmmigrationpb.ListGroupsRequest, opts ...gax.CallOption) *GroupIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListGroups[0:len((*c.CallOptions).ListGroups):len((*c.CallOptions).ListGroups)], opts...)
 	it := &GroupIterator{}
@@ -1632,6 +1664,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetGroup[0:len((*c.CallOptions).GetGroup):len((*c.CallOptions).GetGroup)], opts...)
 	var resp *vmmigrationpb.Group
@@ -1653,6 +1686,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateGroup[0:len((*c.CallOptions).CreateGroup):len((*c.CallOptions).CreateGroup)], opts...)
 	var resp *longrunningpb.Operation
@@ -1676,6 +1710,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "group.name", url.QueryEscape(req.GetGroup().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateGroup[0:len((*c.CallOptions).UpdateGroup):len((*c.CallOptions).UpdateGroup)], opts...)
 	var resp *longrunningpb.Operation
@@ -1699,6 +1734,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteGroup[0:len((*c.CallOptions).DeleteGroup):len((*c.CallOptions).DeleteGroup)], opts...)
 	var resp *longrunningpb.Operation
@@ -1722,6 +1758,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "group", url.QueryEscape(req.GetGroup())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).AddGroupMigration[0:len((*c.CallOptions).AddGroupMigration):len((*c.CallOptions).AddGroupMigration)], opts...)
 	var resp *longrunningpb.Operation
@@ -1745,6 +1782,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "group", url.QueryEscape(req.GetGroup())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).RemoveGroupMigration[0:len((*c.CallOptions).RemoveGroupMigration):len((*c.CallOptions).RemoveGroupMigration)], opts...)
 	var resp *longrunningpb.Operation
@@ -1763,6 +1801,7 @@
 
 func (c *gRPCClient) ListTargetProjects(ctx context.Context, req *vmmigrationpb.ListTargetProjectsRequest, opts ...gax.CallOption) *TargetProjectIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListTargetProjects[0:len((*c.CallOptions).ListTargetProjects):len((*c.CallOptions).ListTargetProjects)], opts...)
 	it := &TargetProjectIterator{}
@@ -1812,6 +1851,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetTargetProject[0:len((*c.CallOptions).GetTargetProject):len((*c.CallOptions).GetTargetProject)], opts...)
 	var resp *vmmigrationpb.TargetProject
@@ -1833,6 +1873,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateTargetProject[0:len((*c.CallOptions).CreateTargetProject):len((*c.CallOptions).CreateTargetProject)], opts...)
 	var resp *longrunningpb.Operation
@@ -1856,6 +1897,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "target_project.name", url.QueryEscape(req.GetTargetProject().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateTargetProject[0:len((*c.CallOptions).UpdateTargetProject):len((*c.CallOptions).UpdateTargetProject)], opts...)
 	var resp *longrunningpb.Operation
@@ -1879,6 +1921,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteTargetProject[0:len((*c.CallOptions).DeleteTargetProject):len((*c.CallOptions).DeleteTargetProject)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/vpcaccess/apiv1/doc.go b/vpcaccess/apiv1/doc.go
index d28ff55..6760a4e 100644
--- a/vpcaccess/apiv1/doc.go
+++ b/vpcaccess/apiv1/doc.go
@@ -89,7 +89,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/vpcaccess/apiv1/version.go b/vpcaccess/apiv1/version.go
new file mode 100644
index 0000000..9ff5117
--- /dev/null
+++ b/vpcaccess/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package vpcaccess
+
+import "cloud.google.com/go/vpcaccess/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/vpcaccess/apiv1/vpc_access_client.go b/vpcaccess/apiv1/vpc_access_client.go
index 38f9e4f..f80d05b 100644
--- a/vpcaccess/apiv1/vpc_access_client.go
+++ b/vpcaccess/apiv1/vpc_access_client.go
@@ -244,7 +244,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -261,6 +261,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateConnector[0:len((*c.CallOptions).CreateConnector):len((*c.CallOptions).CreateConnector)], opts...)
 	var resp *longrunningpb.Operation
@@ -284,6 +285,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetConnector[0:len((*c.CallOptions).GetConnector):len((*c.CallOptions).GetConnector)], opts...)
 	var resp *vpcaccesspb.Connector
@@ -300,6 +302,7 @@
 
 func (c *gRPCClient) ListConnectors(ctx context.Context, req *vpcaccesspb.ListConnectorsRequest, opts ...gax.CallOption) *ConnectorIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListConnectors[0:len((*c.CallOptions).ListConnectors):len((*c.CallOptions).ListConnectors)], opts...)
 	it := &ConnectorIterator{}
@@ -349,6 +352,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteConnector[0:len((*c.CallOptions).DeleteConnector):len((*c.CallOptions).DeleteConnector)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/webrisk/apiv1/doc.go b/webrisk/apiv1/doc.go
index 74cc73b..37a7edf 100644
--- a/webrisk/apiv1/doc.go
+++ b/webrisk/apiv1/doc.go
@@ -82,7 +82,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/webrisk/apiv1/version.go b/webrisk/apiv1/version.go
new file mode 100644
index 0000000..a0d63d3
--- /dev/null
+++ b/webrisk/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package webrisk
+
+import "cloud.google.com/go/webrisk/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/webrisk/apiv1/web_risk_client.go b/webrisk/apiv1/web_risk_client.go
index 5855cb9..7a9f73f 100644
--- a/webrisk/apiv1/web_risk_client.go
+++ b/webrisk/apiv1/web_risk_client.go
@@ -252,7 +252,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -329,6 +329,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateSubmission[0:len((*c.CallOptions).CreateSubmission):len((*c.CallOptions).CreateSubmission)], opts...)
 	var resp *webriskpb.Submission
diff --git a/webrisk/apiv1beta1/doc.go b/webrisk/apiv1beta1/doc.go
index 9e14678..2f3cfb8 100644
--- a/webrisk/apiv1beta1/doc.go
+++ b/webrisk/apiv1beta1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/webrisk/apiv1beta1/version.go b/webrisk/apiv1beta1/version.go
new file mode 100644
index 0000000..a0d63d3
--- /dev/null
+++ b/webrisk/apiv1beta1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package webrisk
+
+import "cloud.google.com/go/webrisk/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/webrisk/apiv1beta1/web_risk_service_v1_beta1_client.go b/webrisk/apiv1beta1/web_risk_service_v1_beta1_client.go
index ac5b2d8..3c8131a 100644
--- a/webrisk/apiv1beta1/web_risk_service_v1_beta1_client.go
+++ b/webrisk/apiv1beta1/web_risk_service_v1_beta1_client.go
@@ -228,7 +228,7 @@
 // use by Google-written clients.
 func (c *webRiskServiceV1Beta1GRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
diff --git a/websecurityscanner/apiv1/doc.go b/websecurityscanner/apiv1/doc.go
index 883b4eb..bd035c6 100644
--- a/websecurityscanner/apiv1/doc.go
+++ b/websecurityscanner/apiv1/doc.go
@@ -84,7 +84,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/websecurityscanner/apiv1/version.go b/websecurityscanner/apiv1/version.go
new file mode 100644
index 0000000..5fcd3a9
--- /dev/null
+++ b/websecurityscanner/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package websecurityscanner
+
+import "cloud.google.com/go/websecurityscanner/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/websecurityscanner/apiv1/web_security_scanner_client.go b/websecurityscanner/apiv1/web_security_scanner_client.go
index 6d0ad4d..ecdb8d3 100644
--- a/websecurityscanner/apiv1/web_security_scanner_client.go
+++ b/websecurityscanner/apiv1/web_security_scanner_client.go
@@ -377,7 +377,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -394,6 +394,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateScanConfig[0:len((*c.CallOptions).CreateScanConfig):len((*c.CallOptions).CreateScanConfig)], opts...)
 	var resp *websecurityscannerpb.ScanConfig
@@ -415,6 +416,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteScanConfig[0:len((*c.CallOptions).DeleteScanConfig):len((*c.CallOptions).DeleteScanConfig)], opts...)
 	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
@@ -432,6 +434,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetScanConfig[0:len((*c.CallOptions).GetScanConfig):len((*c.CallOptions).GetScanConfig)], opts...)
 	var resp *websecurityscannerpb.ScanConfig
@@ -448,6 +451,7 @@
 
 func (c *gRPCClient) ListScanConfigs(ctx context.Context, req *websecurityscannerpb.ListScanConfigsRequest, opts ...gax.CallOption) *ScanConfigIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListScanConfigs[0:len((*c.CallOptions).ListScanConfigs):len((*c.CallOptions).ListScanConfigs)], opts...)
 	it := &ScanConfigIterator{}
@@ -497,6 +501,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "scan_config.name", url.QueryEscape(req.GetScanConfig().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateScanConfig[0:len((*c.CallOptions).UpdateScanConfig):len((*c.CallOptions).UpdateScanConfig)], opts...)
 	var resp *websecurityscannerpb.ScanConfig
@@ -518,6 +523,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StartScanRun[0:len((*c.CallOptions).StartScanRun):len((*c.CallOptions).StartScanRun)], opts...)
 	var resp *websecurityscannerpb.ScanRun
@@ -539,6 +545,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetScanRun[0:len((*c.CallOptions).GetScanRun):len((*c.CallOptions).GetScanRun)], opts...)
 	var resp *websecurityscannerpb.ScanRun
@@ -555,6 +562,7 @@
 
 func (c *gRPCClient) ListScanRuns(ctx context.Context, req *websecurityscannerpb.ListScanRunsRequest, opts ...gax.CallOption) *ScanRunIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListScanRuns[0:len((*c.CallOptions).ListScanRuns):len((*c.CallOptions).ListScanRuns)], opts...)
 	it := &ScanRunIterator{}
@@ -604,6 +612,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).StopScanRun[0:len((*c.CallOptions).StopScanRun):len((*c.CallOptions).StopScanRun)], opts...)
 	var resp *websecurityscannerpb.ScanRun
@@ -620,6 +629,7 @@
 
 func (c *gRPCClient) ListCrawledUrls(ctx context.Context, req *websecurityscannerpb.ListCrawledUrlsRequest, opts ...gax.CallOption) *CrawledUrlIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListCrawledUrls[0:len((*c.CallOptions).ListCrawledUrls):len((*c.CallOptions).ListCrawledUrls)], opts...)
 	it := &CrawledUrlIterator{}
@@ -669,6 +679,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetFinding[0:len((*c.CallOptions).GetFinding):len((*c.CallOptions).GetFinding)], opts...)
 	var resp *websecurityscannerpb.Finding
@@ -685,6 +696,7 @@
 
 func (c *gRPCClient) ListFindings(ctx context.Context, req *websecurityscannerpb.ListFindingsRequest, opts ...gax.CallOption) *FindingIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFindings[0:len((*c.CallOptions).ListFindings):len((*c.CallOptions).ListFindings)], opts...)
 	it := &FindingIterator{}
@@ -734,6 +746,7 @@
 		ctx = cctx
 	}
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListFindingTypeStats[0:len((*c.CallOptions).ListFindingTypeStats):len((*c.CallOptions).ListFindingTypeStats)], opts...)
 	var resp *websecurityscannerpb.ListFindingTypeStatsResponse
diff --git a/workflows/apiv1beta/doc.go b/workflows/apiv1beta/doc.go
index f0f76be..2e307db 100644
--- a/workflows/apiv1beta/doc.go
+++ b/workflows/apiv1beta/doc.go
@@ -93,7 +93,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/workflows/apiv1beta/version.go b/workflows/apiv1beta/version.go
new file mode 100644
index 0000000..e19fc89
--- /dev/null
+++ b/workflows/apiv1beta/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package workflows
+
+import "cloud.google.com/go/workflows/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/workflows/apiv1beta/workflows_client.go b/workflows/apiv1beta/workflows_client.go
index 02a2722..f44dfa3 100644
--- a/workflows/apiv1beta/workflows_client.go
+++ b/workflows/apiv1beta/workflows_client.go
@@ -266,7 +266,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -278,6 +278,7 @@
 
 func (c *gRPCClient) ListWorkflows(ctx context.Context, req *workflowspb.ListWorkflowsRequest, opts ...gax.CallOption) *WorkflowIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListWorkflows[0:len((*c.CallOptions).ListWorkflows):len((*c.CallOptions).ListWorkflows)], opts...)
 	it := &WorkflowIterator{}
@@ -322,6 +323,7 @@
 
 func (c *gRPCClient) GetWorkflow(ctx context.Context, req *workflowspb.GetWorkflowRequest, opts ...gax.CallOption) (*workflowspb.Workflow, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetWorkflow[0:len((*c.CallOptions).GetWorkflow):len((*c.CallOptions).GetWorkflow)], opts...)
 	var resp *workflowspb.Workflow
@@ -338,6 +340,7 @@
 
 func (c *gRPCClient) CreateWorkflow(ctx context.Context, req *workflowspb.CreateWorkflowRequest, opts ...gax.CallOption) (*CreateWorkflowOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateWorkflow[0:len((*c.CallOptions).CreateWorkflow):len((*c.CallOptions).CreateWorkflow)], opts...)
 	var resp *longrunningpb.Operation
@@ -356,6 +359,7 @@
 
 func (c *gRPCClient) DeleteWorkflow(ctx context.Context, req *workflowspb.DeleteWorkflowRequest, opts ...gax.CallOption) (*DeleteWorkflowOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).DeleteWorkflow[0:len((*c.CallOptions).DeleteWorkflow):len((*c.CallOptions).DeleteWorkflow)], opts...)
 	var resp *longrunningpb.Operation
@@ -374,6 +378,7 @@
 
 func (c *gRPCClient) UpdateWorkflow(ctx context.Context, req *workflowspb.UpdateWorkflowRequest, opts ...gax.CallOption) (*UpdateWorkflowOperation, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "workflow.name", url.QueryEscape(req.GetWorkflow().GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).UpdateWorkflow[0:len((*c.CallOptions).UpdateWorkflow):len((*c.CallOptions).UpdateWorkflow)], opts...)
 	var resp *longrunningpb.Operation
diff --git a/workflows/executions/apiv1/doc.go b/workflows/executions/apiv1/doc.go
index 036bf2b..65728f2 100644
--- a/workflows/executions/apiv1/doc.go
+++ b/workflows/executions/apiv1/doc.go
@@ -90,7 +90,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/workflows/executions/apiv1/executions_client.go b/workflows/executions/apiv1/executions_client.go
index 4e2d73f..e40db0b 100644
--- a/workflows/executions/apiv1/executions_client.go
+++ b/workflows/executions/apiv1/executions_client.go
@@ -204,7 +204,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -216,6 +216,7 @@
 
 func (c *gRPCClient) ListExecutions(ctx context.Context, req *executionspb.ListExecutionsRequest, opts ...gax.CallOption) *ExecutionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListExecutions[0:len((*c.CallOptions).ListExecutions):len((*c.CallOptions).ListExecutions)], opts...)
 	it := &ExecutionIterator{}
@@ -260,6 +261,7 @@
 
 func (c *gRPCClient) CreateExecution(ctx context.Context, req *executionspb.CreateExecutionRequest, opts ...gax.CallOption) (*executionspb.Execution, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateExecution[0:len((*c.CallOptions).CreateExecution):len((*c.CallOptions).CreateExecution)], opts...)
 	var resp *executionspb.Execution
@@ -276,6 +278,7 @@
 
 func (c *gRPCClient) GetExecution(ctx context.Context, req *executionspb.GetExecutionRequest, opts ...gax.CallOption) (*executionspb.Execution, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetExecution[0:len((*c.CallOptions).GetExecution):len((*c.CallOptions).GetExecution)], opts...)
 	var resp *executionspb.Execution
@@ -292,6 +295,7 @@
 
 func (c *gRPCClient) CancelExecution(ctx context.Context, req *executionspb.CancelExecutionRequest, opts ...gax.CallOption) (*executionspb.Execution, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelExecution[0:len((*c.CallOptions).CancelExecution):len((*c.CallOptions).CancelExecution)], opts...)
 	var resp *executionspb.Execution
diff --git a/workflows/executions/apiv1/version.go b/workflows/executions/apiv1/version.go
new file mode 100644
index 0000000..ec43961
--- /dev/null
+++ b/workflows/executions/apiv1/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package executions
+
+import "cloud.google.com/go/workflows/internal"
+
+func init() {
+	versionClient = internal.Version
+}
diff --git a/workflows/executions/apiv1beta/doc.go b/workflows/executions/apiv1beta/doc.go
index 60e963a..d860c67 100644
--- a/workflows/executions/apiv1beta/doc.go
+++ b/workflows/executions/apiv1beta/doc.go
@@ -92,7 +92,14 @@
 type clientHookParams struct{}
 type clientHook func(context.Context, clientHookParams) ([]option.ClientOption, error)
 
-const versionClient = "20220222"
+var versionClient string
+
+func getVersionClient() string {
+	if versionClient == "" {
+		return "UNKNOWN"
+	}
+	return versionClient
+}
 
 func insertMetadata(ctx context.Context, mds ...metadata.MD) context.Context {
 	out, _ := metadata.FromOutgoingContext(ctx)
diff --git a/workflows/executions/apiv1beta/executions_client.go b/workflows/executions/apiv1beta/executions_client.go
index 701e56d..d1955dc 100644
--- a/workflows/executions/apiv1beta/executions_client.go
+++ b/workflows/executions/apiv1beta/executions_client.go
@@ -204,7 +204,7 @@
 // use by Google-written clients.
 func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
 	kv := append([]string{"gl-go", versionGo()}, keyval...)
-	kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
+	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
 	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
 }
 
@@ -216,6 +216,7 @@
 
 func (c *gRPCClient) ListExecutions(ctx context.Context, req *executionspb.ListExecutionsRequest, opts ...gax.CallOption) *ExecutionIterator {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).ListExecutions[0:len((*c.CallOptions).ListExecutions):len((*c.CallOptions).ListExecutions)], opts...)
 	it := &ExecutionIterator{}
@@ -260,6 +261,7 @@
 
 func (c *gRPCClient) CreateExecution(ctx context.Context, req *executionspb.CreateExecutionRequest, opts ...gax.CallOption) (*executionspb.Execution, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CreateExecution[0:len((*c.CallOptions).CreateExecution):len((*c.CallOptions).CreateExecution)], opts...)
 	var resp *executionspb.Execution
@@ -276,6 +278,7 @@
 
 func (c *gRPCClient) GetExecution(ctx context.Context, req *executionspb.GetExecutionRequest, opts ...gax.CallOption) (*executionspb.Execution, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).GetExecution[0:len((*c.CallOptions).GetExecution):len((*c.CallOptions).GetExecution)], opts...)
 	var resp *executionspb.Execution
@@ -292,6 +295,7 @@
 
 func (c *gRPCClient) CancelExecution(ctx context.Context, req *executionspb.CancelExecutionRequest, opts ...gax.CallOption) (*executionspb.Execution, error) {
 	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
+
 	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
 	opts = append((*c.CallOptions).CancelExecution[0:len((*c.CallOptions).CancelExecution):len((*c.CallOptions).CancelExecution)], opts...)
 	var resp *executionspb.Execution
diff --git a/workflows/executions/apiv1beta/version.go b/workflows/executions/apiv1beta/version.go
new file mode 100644
index 0000000..ec43961
--- /dev/null
+++ b/workflows/executions/apiv1beta/version.go
@@ -0,0 +1,23 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by gapicgen. DO NOT EDIT.
+
+package executions
+
+import "cloud.google.com/go/workflows/internal"
+
+func init() {
+	versionClient = internal.Version
+}