support/apiv2/case_client.go

// Copyright 2023 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
//
//     https://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 protoc-gen-go_gapic. DO NOT EDIT.

package support

import (
	"bytes"
	"context"
	"fmt"
	"io"
	"math"
	"net/http"
	"net/url"
	"time"

	supportpb "cloud.google.com/go/support/apiv2/supportpb"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/googleapi"
	"google.golang.org/api/iterator"
	"google.golang.org/api/option"
	"google.golang.org/api/option/internaloption"
	gtransport "google.golang.org/api/transport/grpc"
	httptransport "google.golang.org/api/transport/http"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/encoding/protojson"
	"google.golang.org/protobuf/proto"
)

var newCaseClientHook clientHook

// CaseCallOptions contains the retry settings for each method of CaseClient.
type CaseCallOptions struct {
	GetCase                   []gax.CallOption
	ListCases                 []gax.CallOption
	SearchCases               []gax.CallOption
	CreateCase                []gax.CallOption
	UpdateCase                []gax.CallOption
	EscalateCase              []gax.CallOption
	CloseCase                 []gax.CallOption
	SearchCaseClassifications []gax.CallOption
}

func defaultCaseGRPCClientOptions() []option.ClientOption {
	return []option.ClientOption{
		internaloption.WithDefaultEndpoint("cloudsupport.googleapis.com:443"),
		internaloption.WithDefaultMTLSEndpoint("cloudsupport.mtls.googleapis.com:443"),
		internaloption.WithDefaultAudience("https://cloudsupport.googleapis.com/"),
		internaloption.WithDefaultScopes(DefaultAuthScopes()...),
		internaloption.EnableJwtWithScope(),
		option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
			grpc.MaxCallRecvMsgSize(math.MaxInt32))),
	}
}

func defaultCaseCallOptions() *CaseCallOptions {
	return &CaseCallOptions{
		GetCase: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ListCases: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		SearchCases: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		CreateCase: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		UpdateCase: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		EscalateCase: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		CloseCase: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		SearchCaseClassifications: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
	}
}

func defaultCaseRESTCallOptions() *CaseCallOptions {
	return &CaseCallOptions{
		GetCase: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		ListCases: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		SearchCases: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		CreateCase: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		UpdateCase: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		EscalateCase: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		CloseCase: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
		},
		SearchCaseClassifications: []gax.CallOption{
			gax.WithTimeout(60000 * time.Millisecond),
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
	}
}

// internalCaseClient is an interface that defines the methods available from Google Cloud Support API.
type internalCaseClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	GetCase(context.Context, *supportpb.GetCaseRequest, ...gax.CallOption) (*supportpb.Case, error)
	ListCases(context.Context, *supportpb.ListCasesRequest, ...gax.CallOption) *CaseIterator
	SearchCases(context.Context, *supportpb.SearchCasesRequest, ...gax.CallOption) *CaseIterator
	CreateCase(context.Context, *supportpb.CreateCaseRequest, ...gax.CallOption) (*supportpb.Case, error)
	UpdateCase(context.Context, *supportpb.UpdateCaseRequest, ...gax.CallOption) (*supportpb.Case, error)
	EscalateCase(context.Context, *supportpb.EscalateCaseRequest, ...gax.CallOption) (*supportpb.Case, error)
	CloseCase(context.Context, *supportpb.CloseCaseRequest, ...gax.CallOption) (*supportpb.Case, error)
	SearchCaseClassifications(context.Context, *supportpb.SearchCaseClassificationsRequest, ...gax.CallOption) *CaseClassificationIterator
}

// CaseClient is a client for interacting with Google Cloud Support API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// A service to manage Google Cloud support cases.
type CaseClient struct {
	// The internal transport-dependent client.
	internalClient internalCaseClient

	// The call options for this service.
	CallOptions *CaseCallOptions
}

// Wrapper methods routed to the internal client.

// Close closes the connection to the API service. The user should invoke this when
// the client is no longer required.
func (c *CaseClient) Close() error {
	return c.internalClient.Close()
}

// setGoogleClientInfo sets the name and version of the application in
// the `x-goog-api-client` header passed on each request. Intended for
// use by Google-written clients.
func (c *CaseClient) setGoogleClientInfo(keyval ...string) {
	c.internalClient.setGoogleClientInfo(keyval...)
}

// Connection returns a connection to the API service.
//
// Deprecated: Connections are now pooled so this method does not always
// return the same resource.
func (c *CaseClient) Connection() *grpc.ClientConn {
	return c.internalClient.Connection()
}

// GetCase retrieve the specified case.
func (c *CaseClient) GetCase(ctx context.Context, req *supportpb.GetCaseRequest, opts ...gax.CallOption) (*supportpb.Case, error) {
	return c.internalClient.GetCase(ctx, req, opts...)
}

// ListCases retrieve all cases under the specified parent.
//
// Note: Listing cases under an Organization returns only the cases directly
// parented by that organization. To retrieve all cases under an organization,
// including cases parented by projects under that organization, use
// cases.search.
func (c *CaseClient) ListCases(ctx context.Context, req *supportpb.ListCasesRequest, opts ...gax.CallOption) *CaseIterator {
	return c.internalClient.ListCases(ctx, req, opts...)
}

// SearchCases search cases using the specified query.
func (c *CaseClient) SearchCases(ctx context.Context, req *supportpb.SearchCasesRequest, opts ...gax.CallOption) *CaseIterator {
	return c.internalClient.SearchCases(ctx, req, opts...)
}

// CreateCase create a new case and associate it with the given Google Cloud Resource.
// The case object must have the following fields set: display_name,
// description, classification, and priority.
func (c *CaseClient) CreateCase(ctx context.Context, req *supportpb.CreateCaseRequest, opts ...gax.CallOption) (*supportpb.Case, error) {
	return c.internalClient.CreateCase(ctx, req, opts...)
}

// UpdateCase update the specified case. Only a subset of fields can be updated.
func (c *CaseClient) UpdateCase(ctx context.Context, req *supportpb.UpdateCaseRequest, opts ...gax.CallOption) (*supportpb.Case, error) {
	return c.internalClient.UpdateCase(ctx, req, opts...)
}

// EscalateCase escalate a case. Escalating a case will initiate the Google Cloud Support
// escalation management process.
//
// This operation is only available to certain Customer Care tiers. Go to
// https://cloud.google.com/support (at https://cloud.google.com/support) and look for ‘Technical support
// escalations’ in the feature list to find out which tiers are able to
// perform escalations.
func (c *CaseClient) EscalateCase(ctx context.Context, req *supportpb.EscalateCaseRequest, opts ...gax.CallOption) (*supportpb.Case, error) {
	return c.internalClient.EscalateCase(ctx, req, opts...)
}

// CloseCase close the specified case.
func (c *CaseClient) CloseCase(ctx context.Context, req *supportpb.CloseCaseRequest, opts ...gax.CallOption) (*supportpb.Case, error) {
	return c.internalClient.CloseCase(ctx, req, opts...)
}

// SearchCaseClassifications retrieve valid classifications to be used when creating a support case.
// The classications are hierarchical, with each classification containing
// all levels of the hierarchy, separated by " > ". For example “Technical
// Issue > Compute > Compute Engine”.
func (c *CaseClient) SearchCaseClassifications(ctx context.Context, req *supportpb.SearchCaseClassificationsRequest, opts ...gax.CallOption) *CaseClassificationIterator {
	return c.internalClient.SearchCaseClassifications(ctx, req, opts...)
}

// caseGRPCClient is a client for interacting with Google Cloud Support API over gRPC transport.
//
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type caseGRPCClient struct {
	// Connection pool of gRPC connections to the service.
	connPool gtransport.ConnPool

	// Points back to the CallOptions field of the containing CaseClient
	CallOptions **CaseCallOptions

	// The gRPC API client.
	caseClient supportpb.CaseServiceClient

	// The x-goog-* metadata to be sent with each request.
	xGoogMetadata metadata.MD
}

// NewCaseClient creates a new case service client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// A service to manage Google Cloud support cases.
func NewCaseClient(ctx context.Context, opts ...option.ClientOption) (*CaseClient, error) {
	clientOpts := defaultCaseGRPCClientOptions()
	if newCaseClientHook != nil {
		hookOpts, err := newCaseClientHook(ctx, clientHookParams{})
		if err != nil {
			return nil, err
		}
		clientOpts = append(clientOpts, hookOpts...)
	}

	connPool, err := gtransport.DialPool(ctx, append(clientOpts, opts...)...)
	if err != nil {
		return nil, err
	}
	client := CaseClient{CallOptions: defaultCaseCallOptions()}

	c := &caseGRPCClient{
		connPool:    connPool,
		caseClient:  supportpb.NewCaseServiceClient(connPool),
		CallOptions: &client.CallOptions,
	}
	c.setGoogleClientInfo()

	client.internalClient = c

	return &client, nil
}

// Connection returns a connection to the API service.
//
// Deprecated: Connections are now pooled so this method does not always
// return the same resource.
func (c *caseGRPCClient) Connection() *grpc.ClientConn {
	return c.connPool.Conn()
}

// setGoogleClientInfo sets the name and version of the application in
// the `x-goog-api-client` header passed on each request. Intended for
// use by Google-written clients.
func (c *caseGRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", gax.GoVersion}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
}

// Close closes the connection to the API service. The user should invoke this when
// the client is no longer required.
func (c *caseGRPCClient) Close() error {
	return c.connPool.Close()
}

// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type caseRESTClient struct {
	// The http endpoint to connect to.
	endpoint string

	// The http client.
	httpClient *http.Client

	// The x-goog-* metadata to be sent with each request.
	xGoogMetadata metadata.MD

	// Points back to the CallOptions field of the containing CaseClient
	CallOptions **CaseCallOptions
}

// NewCaseRESTClient creates a new case service rest client.
//
// A service to manage Google Cloud support cases.
func NewCaseRESTClient(ctx context.Context, opts ...option.ClientOption) (*CaseClient, error) {
	clientOpts := append(defaultCaseRESTClientOptions(), opts...)
	httpClient, endpoint, err := httptransport.NewClient(ctx, clientOpts...)
	if err != nil {
		return nil, err
	}

	callOpts := defaultCaseRESTCallOptions()
	c := &caseRESTClient{
		endpoint:    endpoint,
		httpClient:  httpClient,
		CallOptions: &callOpts,
	}
	c.setGoogleClientInfo()

	return &CaseClient{internalClient: c, CallOptions: callOpts}, nil
}

func defaultCaseRESTClientOptions() []option.ClientOption {
	return []option.ClientOption{
		internaloption.WithDefaultEndpoint("https://cloudsupport.googleapis.com"),
		internaloption.WithDefaultMTLSEndpoint("https://cloudsupport.mtls.googleapis.com"),
		internaloption.WithDefaultAudience("https://cloudsupport.googleapis.com/"),
		internaloption.WithDefaultScopes(DefaultAuthScopes()...),
	}
}

// setGoogleClientInfo sets the name and version of the application in
// the `x-goog-api-client` header passed on each request. Intended for
// use by Google-written clients.
func (c *caseRESTClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", gax.GoVersion}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN")
	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
}

// Close closes the connection to the API service. The user should invoke this when
// the client is no longer required.
func (c *caseRESTClient) Close() error {
	// Replace httpClient with nil to force cleanup.
	c.httpClient = nil
	return nil
}

// Connection returns a connection to the API service.
//
// Deprecated: This method always returns nil.
func (c *caseRESTClient) Connection() *grpc.ClientConn {
	return nil
}
func (c *caseGRPCClient) GetCase(ctx context.Context, req *supportpb.GetCaseRequest, opts ...gax.CallOption) (*supportpb.Case, 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).GetCase[0:len((*c.CallOptions).GetCase):len((*c.CallOptions).GetCase)], opts...)
	var resp *supportpb.Case
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.caseClient.GetCase(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *caseGRPCClient) ListCases(ctx context.Context, req *supportpb.ListCasesRequest, opts ...gax.CallOption) *CaseIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListCases[0:len((*c.CallOptions).ListCases):len((*c.CallOptions).ListCases)], opts...)
	it := &CaseIterator{}
	req = proto.Clone(req).(*supportpb.ListCasesRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*supportpb.Case, string, error) {
		resp := &supportpb.ListCasesResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.caseClient.ListCases(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetCases(), resp.GetNextPageToken(), nil
	}
	fetch := func(pageSize int, pageToken string) (string, error) {
		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
		if err != nil {
			return "", err
		}
		it.items = append(it.items, items...)
		return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
}

func (c *caseGRPCClient) SearchCases(ctx context.Context, req *supportpb.SearchCasesRequest, opts ...gax.CallOption) *CaseIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).SearchCases[0:len((*c.CallOptions).SearchCases):len((*c.CallOptions).SearchCases)], opts...)
	it := &CaseIterator{}
	req = proto.Clone(req).(*supportpb.SearchCasesRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*supportpb.Case, string, error) {
		resp := &supportpb.SearchCasesResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.caseClient.SearchCases(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetCases(), resp.GetNextPageToken(), nil
	}
	fetch := func(pageSize int, pageToken string) (string, error) {
		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
		if err != nil {
			return "", err
		}
		it.items = append(it.items, items...)
		return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
}

func (c *caseGRPCClient) CreateCase(ctx context.Context, req *supportpb.CreateCaseRequest, opts ...gax.CallOption) (*supportpb.Case, 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).CreateCase[0:len((*c.CallOptions).CreateCase):len((*c.CallOptions).CreateCase)], opts...)
	var resp *supportpb.Case
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.caseClient.CreateCase(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *caseGRPCClient) UpdateCase(ctx context.Context, req *supportpb.UpdateCaseRequest, opts ...gax.CallOption) (*supportpb.Case, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "case.name", url.QueryEscape(req.GetCase().GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).UpdateCase[0:len((*c.CallOptions).UpdateCase):len((*c.CallOptions).UpdateCase)], opts...)
	var resp *supportpb.Case
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.caseClient.UpdateCase(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *caseGRPCClient) EscalateCase(ctx context.Context, req *supportpb.EscalateCaseRequest, opts ...gax.CallOption) (*supportpb.Case, 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).EscalateCase[0:len((*c.CallOptions).EscalateCase):len((*c.CallOptions).EscalateCase)], opts...)
	var resp *supportpb.Case
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.caseClient.EscalateCase(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *caseGRPCClient) CloseCase(ctx context.Context, req *supportpb.CloseCaseRequest, opts ...gax.CallOption) (*supportpb.Case, 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).CloseCase[0:len((*c.CallOptions).CloseCase):len((*c.CallOptions).CloseCase)], opts...)
	var resp *supportpb.Case
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.caseClient.CloseCase(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *caseGRPCClient) SearchCaseClassifications(ctx context.Context, req *supportpb.SearchCaseClassificationsRequest, opts ...gax.CallOption) *CaseClassificationIterator {
	ctx = insertMetadata(ctx, c.xGoogMetadata)
	opts = append((*c.CallOptions).SearchCaseClassifications[0:len((*c.CallOptions).SearchCaseClassifications):len((*c.CallOptions).SearchCaseClassifications)], opts...)
	it := &CaseClassificationIterator{}
	req = proto.Clone(req).(*supportpb.SearchCaseClassificationsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*supportpb.CaseClassification, string, error) {
		resp := &supportpb.SearchCaseClassificationsResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.caseClient.SearchCaseClassifications(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetCaseClassifications(), resp.GetNextPageToken(), nil
	}
	fetch := func(pageSize int, pageToken string) (string, error) {
		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
		if err != nil {
			return "", err
		}
		it.items = append(it.items, items...)
		return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
}

// GetCase retrieve the specified case.
func (c *caseRESTClient) GetCase(ctx context.Context, req *supportpb.GetCaseRequest, opts ...gax.CallOption) (*supportpb.Case, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%v", req.GetName())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	headers := buildHeaders(ctx, c.xGoogMetadata, md, metadata.Pairs("Content-Type", "application/json"))
	opts = append((*c.CallOptions).GetCase[0:len((*c.CallOptions).GetCase):len((*c.CallOptions).GetCase)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &supportpb.Case{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("GET", baseUrl.String(), nil)
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// ListCases retrieve all cases under the specified parent.
//
// Note: Listing cases under an Organization returns only the cases directly
// parented by that organization. To retrieve all cases under an organization,
// including cases parented by projects under that organization, use
// cases.search.
func (c *caseRESTClient) ListCases(ctx context.Context, req *supportpb.ListCasesRequest, opts ...gax.CallOption) *CaseIterator {
	it := &CaseIterator{}
	req = proto.Clone(req).(*supportpb.ListCasesRequest)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	it.InternalFetch = func(pageSize int, pageToken string) ([]*supportpb.Case, string, error) {
		resp := &supportpb.ListCasesResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		baseUrl, err := url.Parse(c.endpoint)
		if err != nil {
			return nil, "", err
		}
		baseUrl.Path += fmt.Sprintf("/v2/%v/cases", req.GetParent())

		params := url.Values{}
		params.Add("$alt", "json;enum-encoding=int")
		if req.GetFilter() != "" {
			params.Add("filter", fmt.Sprintf("%v", req.GetFilter()))
		}
		if req.GetPageSize() != 0 {
			params.Add("pageSize", fmt.Sprintf("%v", req.GetPageSize()))
		}
		if req.GetPageToken() != "" {
			params.Add("pageToken", fmt.Sprintf("%v", req.GetPageToken()))
		}

		baseUrl.RawQuery = params.Encode()

		// Build HTTP headers from client and context metadata.
		headers := buildHeaders(ctx, c.xGoogMetadata, metadata.Pairs("Content-Type", "application/json"))
		e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			if settings.Path != "" {
				baseUrl.Path = settings.Path
			}
			httpReq, err := http.NewRequest("GET", baseUrl.String(), nil)
			if err != nil {
				return err
			}
			httpReq.Header = headers

			httpRsp, err := c.httpClient.Do(httpReq)
			if err != nil {
				return err
			}
			defer httpRsp.Body.Close()

			if err = googleapi.CheckResponse(httpRsp); err != nil {
				return err
			}

			buf, err := io.ReadAll(httpRsp.Body)
			if err != nil {
				return err
			}

			if err := unm.Unmarshal(buf, resp); err != nil {
				return err
			}

			return nil
		}, opts...)
		if e != nil {
			return nil, "", e
		}
		it.Response = resp
		return resp.GetCases(), resp.GetNextPageToken(), nil
	}

	fetch := func(pageSize int, pageToken string) (string, error) {
		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
		if err != nil {
			return "", err
		}
		it.items = append(it.items, items...)
		return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
}

// SearchCases search cases using the specified query.
func (c *caseRESTClient) SearchCases(ctx context.Context, req *supportpb.SearchCasesRequest, opts ...gax.CallOption) *CaseIterator {
	it := &CaseIterator{}
	req = proto.Clone(req).(*supportpb.SearchCasesRequest)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	it.InternalFetch = func(pageSize int, pageToken string) ([]*supportpb.Case, string, error) {
		resp := &supportpb.SearchCasesResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		baseUrl, err := url.Parse(c.endpoint)
		if err != nil {
			return nil, "", err
		}
		baseUrl.Path += fmt.Sprintf("/v2/%v/cases:search", req.GetParent())

		params := url.Values{}
		params.Add("$alt", "json;enum-encoding=int")
		if req.GetPageSize() != 0 {
			params.Add("pageSize", fmt.Sprintf("%v", req.GetPageSize()))
		}
		if req.GetPageToken() != "" {
			params.Add("pageToken", fmt.Sprintf("%v", req.GetPageToken()))
		}
		if req.GetQuery() != "" {
			params.Add("query", fmt.Sprintf("%v", req.GetQuery()))
		}

		baseUrl.RawQuery = params.Encode()

		// Build HTTP headers from client and context metadata.
		headers := buildHeaders(ctx, c.xGoogMetadata, metadata.Pairs("Content-Type", "application/json"))
		e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			if settings.Path != "" {
				baseUrl.Path = settings.Path
			}
			httpReq, err := http.NewRequest("GET", baseUrl.String(), nil)
			if err != nil {
				return err
			}
			httpReq.Header = headers

			httpRsp, err := c.httpClient.Do(httpReq)
			if err != nil {
				return err
			}
			defer httpRsp.Body.Close()

			if err = googleapi.CheckResponse(httpRsp); err != nil {
				return err
			}

			buf, err := io.ReadAll(httpRsp.Body)
			if err != nil {
				return err
			}

			if err := unm.Unmarshal(buf, resp); err != nil {
				return err
			}

			return nil
		}, opts...)
		if e != nil {
			return nil, "", e
		}
		it.Response = resp
		return resp.GetCases(), resp.GetNextPageToken(), nil
	}

	fetch := func(pageSize int, pageToken string) (string, error) {
		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
		if err != nil {
			return "", err
		}
		it.items = append(it.items, items...)
		return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
}

// CreateCase create a new case and associate it with the given Google Cloud Resource.
// The case object must have the following fields set: display_name,
// description, classification, and priority.
func (c *caseRESTClient) CreateCase(ctx context.Context, req *supportpb.CreateCaseRequest, opts ...gax.CallOption) (*supportpb.Case, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetCase()
	jsonReq, err := m.Marshal(body)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%v/cases", req.GetParent())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	headers := buildHeaders(ctx, c.xGoogMetadata, md, metadata.Pairs("Content-Type", "application/json"))
	opts = append((*c.CallOptions).CreateCase[0:len((*c.CallOptions).CreateCase):len((*c.CallOptions).CreateCase)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &supportpb.Case{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// UpdateCase update the specified case. Only a subset of fields can be updated.
func (c *caseRESTClient) UpdateCase(ctx context.Context, req *supportpb.UpdateCaseRequest, opts ...gax.CallOption) (*supportpb.Case, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetCase()
	jsonReq, err := m.Marshal(body)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%v", req.GetCase().GetName())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")
	if req.GetUpdateMask() != nil {
		updateMask, err := protojson.Marshal(req.GetUpdateMask())
		if err != nil {
			return nil, err
		}
		params.Add("updateMask", string(updateMask[1:len(updateMask)-1]))
	}

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "case.name", url.QueryEscape(req.GetCase().GetName())))

	headers := buildHeaders(ctx, c.xGoogMetadata, md, metadata.Pairs("Content-Type", "application/json"))
	opts = append((*c.CallOptions).UpdateCase[0:len((*c.CallOptions).UpdateCase):len((*c.CallOptions).UpdateCase)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &supportpb.Case{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("PATCH", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// EscalateCase escalate a case. Escalating a case will initiate the Google Cloud Support
// escalation management process.
//
// This operation is only available to certain Customer Care tiers. Go to
// https://cloud.google.com/support (at https://cloud.google.com/support) and look for ‘Technical support
// escalations’ in the feature list to find out which tiers are able to
// perform escalations.
func (c *caseRESTClient) EscalateCase(ctx context.Context, req *supportpb.EscalateCaseRequest, opts ...gax.CallOption) (*supportpb.Case, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%v:escalate", req.GetName())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	headers := buildHeaders(ctx, c.xGoogMetadata, md, metadata.Pairs("Content-Type", "application/json"))
	opts = append((*c.CallOptions).EscalateCase[0:len((*c.CallOptions).EscalateCase):len((*c.CallOptions).EscalateCase)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &supportpb.Case{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// CloseCase close the specified case.
func (c *caseRESTClient) CloseCase(ctx context.Context, req *supportpb.CloseCaseRequest, opts ...gax.CallOption) (*supportpb.Case, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%v:close", req.GetName())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	headers := buildHeaders(ctx, c.xGoogMetadata, md, metadata.Pairs("Content-Type", "application/json"))
	opts = append((*c.CallOptions).CloseCase[0:len((*c.CallOptions).CloseCase):len((*c.CallOptions).CloseCase)], opts...)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	resp := &supportpb.Case{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		httpRsp, err := c.httpClient.Do(httpReq)
		if err != nil {
			return err
		}
		defer httpRsp.Body.Close()

		if err = googleapi.CheckResponse(httpRsp); err != nil {
			return err
		}

		buf, err := io.ReadAll(httpRsp.Body)
		if err != nil {
			return err
		}

		if err := unm.Unmarshal(buf, resp); err != nil {
			return err
		}

		return nil
	}, opts...)
	if e != nil {
		return nil, e
	}
	return resp, nil
}

// SearchCaseClassifications retrieve valid classifications to be used when creating a support case.
// The classications are hierarchical, with each classification containing
// all levels of the hierarchy, separated by " > ". For example “Technical
// Issue > Compute > Compute Engine”.
func (c *caseRESTClient) SearchCaseClassifications(ctx context.Context, req *supportpb.SearchCaseClassificationsRequest, opts ...gax.CallOption) *CaseClassificationIterator {
	it := &CaseClassificationIterator{}
	req = proto.Clone(req).(*supportpb.SearchCaseClassificationsRequest)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	it.InternalFetch = func(pageSize int, pageToken string) ([]*supportpb.CaseClassification, string, error) {
		resp := &supportpb.SearchCaseClassificationsResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		baseUrl, err := url.Parse(c.endpoint)
		if err != nil {
			return nil, "", err
		}
		baseUrl.Path += fmt.Sprintf("/v2/caseClassifications:search")

		params := url.Values{}
		params.Add("$alt", "json;enum-encoding=int")
		if req.GetPageSize() != 0 {
			params.Add("pageSize", fmt.Sprintf("%v", req.GetPageSize()))
		}
		if req.GetPageToken() != "" {
			params.Add("pageToken", fmt.Sprintf("%v", req.GetPageToken()))
		}
		if req.GetQuery() != "" {
			params.Add("query", fmt.Sprintf("%v", req.GetQuery()))
		}

		baseUrl.RawQuery = params.Encode()

		// Build HTTP headers from client and context metadata.
		headers := buildHeaders(ctx, c.xGoogMetadata, metadata.Pairs("Content-Type", "application/json"))
		e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			if settings.Path != "" {
				baseUrl.Path = settings.Path
			}
			httpReq, err := http.NewRequest("GET", baseUrl.String(), nil)
			if err != nil {
				return err
			}
			httpReq.Header = headers

			httpRsp, err := c.httpClient.Do(httpReq)
			if err != nil {
				return err
			}
			defer httpRsp.Body.Close()

			if err = googleapi.CheckResponse(httpRsp); err != nil {
				return err
			}

			buf, err := io.ReadAll(httpRsp.Body)
			if err != nil {
				return err
			}

			if err := unm.Unmarshal(buf, resp); err != nil {
				return err
			}

			return nil
		}, opts...)
		if e != nil {
			return nil, "", e
		}
		it.Response = resp
		return resp.GetCaseClassifications(), resp.GetNextPageToken(), nil
	}

	fetch := func(pageSize int, pageToken string) (string, error) {
		items, nextPageToken, err := it.InternalFetch(pageSize, pageToken)
		if err != nil {
			return "", err
		}
		it.items = append(it.items, items...)
		return nextPageToken, nil
	}

	it.pageInfo, it.nextFunc = iterator.NewPageInfo(fetch, it.bufLen, it.takeBuf)
	it.pageInfo.MaxSize = int(req.GetPageSize())
	it.pageInfo.Token = req.GetPageToken()

	return it
}

// CaseClassificationIterator manages a stream of *supportpb.CaseClassification.
type CaseClassificationIterator struct {
	items    []*supportpb.CaseClassification
	pageInfo *iterator.PageInfo
	nextFunc func() error

	// Response is the raw response for the current page.
	// It must be cast to the RPC response type.
	// Calling Next() or InternalFetch() updates this value.
	Response interface{}

	// InternalFetch is for use by the Google Cloud Libraries only.
	// It is not part of the stable interface of this package.
	//
	// InternalFetch returns results from a single call to the underlying RPC.
	// The number of results is no greater than pageSize.
	// If there are no more results, nextPageToken is empty and err is nil.
	InternalFetch func(pageSize int, pageToken string) (results []*supportpb.CaseClassification, nextPageToken string, err error)
}

// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *CaseClassificationIterator) PageInfo() *iterator.PageInfo {
	return it.pageInfo
}

// Next returns the next result. Its second return value is iterator.Done if there are no more
// results. Once Next returns Done, all subsequent calls will return Done.
func (it *CaseClassificationIterator) Next() (*supportpb.CaseClassification, error) {
	var item *supportpb.CaseClassification
	if err := it.nextFunc(); err != nil {
		return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
}

func (it *CaseClassificationIterator) bufLen() int {
	return len(it.items)
}

func (it *CaseClassificationIterator) takeBuf() interface{} {
	b := it.items
	it.items = nil
	return b
}

// CaseIterator manages a stream of *supportpb.Case.
type CaseIterator struct {
	items    []*supportpb.Case
	pageInfo *iterator.PageInfo
	nextFunc func() error

	// Response is the raw response for the current page.
	// It must be cast to the RPC response type.
	// Calling Next() or InternalFetch() updates this value.
	Response interface{}

	// InternalFetch is for use by the Google Cloud Libraries only.
	// It is not part of the stable interface of this package.
	//
	// InternalFetch returns results from a single call to the underlying RPC.
	// The number of results is no greater than pageSize.
	// If there are no more results, nextPageToken is empty and err is nil.
	InternalFetch func(pageSize int, pageToken string) (results []*supportpb.Case, nextPageToken string, err error)
}

// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *CaseIterator) PageInfo() *iterator.PageInfo {
	return it.pageInfo
}

// Next returns the next result. Its second return value is iterator.Done if there are no more
// results. Once Next returns Done, all subsequent calls will return Done.
func (it *CaseIterator) Next() (*supportpb.Case, error) {
	var item *supportpb.Case
	if err := it.nextFunc(); err != nil {
		return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
}

func (it *CaseIterator) bufLen() int {
	return len(it.items)
}

func (it *CaseIterator) takeBuf() interface{} {
	b := it.items
	it.items = nil
	return b
}