recommendationengine/apiv1beta1/auxiliary.go - gocloud - Git at Google

 // Copyright 2024 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 recommendationengine

 import (
 	"context"
 	"time"

 	"cloud.google.com/go/longrunning"
 	recommendationenginepb "cloud.google.com/go/recommendationengine/apiv1beta1/recommendationenginepb"
 	gax "github.com/googleapis/gax-go/v2"
 	"google.golang.org/api/iterator"
 )

 // ImportCatalogItemsOperation manages a long-running operation from ImportCatalogItems.
 type ImportCatalogItemsOperation struct {
 	lro      *longrunning.Operation
 	pollPath string
 }

 // Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
 //
 // See documentation of Poll for error-handling information.
 func (op *ImportCatalogItemsOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*recommendationenginepb.ImportCatalogItemsResponse, error) {
 	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
 	var resp recommendationenginepb.ImportCatalogItemsResponse
 	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
 		return nil, err
 	}
 	return &resp, nil
 }

 // Poll fetches the latest state of the long-running operation.
 //
 // Poll also fetches the latest metadata, which can be retrieved by Metadata.
 //
 // If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
 // the operation has completed with failure, the error is returned and op.Done will return true.
 // If Poll succeeds and the operation has completed successfully,
 // op.Done will return true, and the response of the operation is returned.
 // If Poll succeeds and the operation has not completed, the returned response and error are both nil.
 func (op *ImportCatalogItemsOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*recommendationenginepb.ImportCatalogItemsResponse, error) {
 	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
 	var resp recommendationenginepb.ImportCatalogItemsResponse
 	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
 		return nil, err
 	}
 	if !op.Done() {
 		return nil, nil
 	}
 	return &resp, nil
 }

 // Metadata returns metadata associated with the long-running operation.
 // Metadata itself does not contact the server, but Poll does.
 // To get the latest metadata, call this method after a successful call to Poll.
 // If the metadata is not available, the returned metadata and error are both nil.
 func (op *ImportCatalogItemsOperation) Metadata() (*recommendationenginepb.ImportMetadata, error) {
 	var meta recommendationenginepb.ImportMetadata
 	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
 		return nil, nil
 	} else if err != nil {
 		return nil, err
 	}
 	return &meta, nil
 }

 // Done reports whether the long-running operation has completed.
 func (op *ImportCatalogItemsOperation) Done() bool {
 	return op.lro.Done()
 }

 // Name returns the name of the long-running operation.
 // The name is assigned by the server and is unique within the service from which the operation is created.
 func (op *ImportCatalogItemsOperation) Name() string {
 	return op.lro.Name()
 }

 // ImportUserEventsOperation manages a long-running operation from ImportUserEvents.
 type ImportUserEventsOperation struct {
 	lro      *longrunning.Operation
 	pollPath string
 }

 // Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
 //
 // See documentation of Poll for error-handling information.
 func (op *ImportUserEventsOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*recommendationenginepb.ImportUserEventsResponse, error) {
 	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
 	var resp recommendationenginepb.ImportUserEventsResponse
 	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
 		return nil, err
 	}
 	return &resp, nil
 }

 // Poll fetches the latest state of the long-running operation.
 //
 // Poll also fetches the latest metadata, which can be retrieved by Metadata.
 //
 // If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
 // the operation has completed with failure, the error is returned and op.Done will return true.
 // If Poll succeeds and the operation has completed successfully,
 // op.Done will return true, and the response of the operation is returned.
 // If Poll succeeds and the operation has not completed, the returned response and error are both nil.
 func (op *ImportUserEventsOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*recommendationenginepb.ImportUserEventsResponse, error) {
 	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
 	var resp recommendationenginepb.ImportUserEventsResponse
 	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
 		return nil, err
 	}
 	if !op.Done() {
 		return nil, nil
 	}
 	return &resp, nil
 }

 // Metadata returns metadata associated with the long-running operation.
 // Metadata itself does not contact the server, but Poll does.
 // To get the latest metadata, call this method after a successful call to Poll.
 // If the metadata is not available, the returned metadata and error are both nil.
 func (op *ImportUserEventsOperation) Metadata() (*recommendationenginepb.ImportMetadata, error) {
 	var meta recommendationenginepb.ImportMetadata
 	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
 		return nil, nil
 	} else if err != nil {
 		return nil, err
 	}
 	return &meta, nil
 }

 // Done reports whether the long-running operation has completed.
 func (op *ImportUserEventsOperation) Done() bool {
 	return op.lro.Done()
 }

 // Name returns the name of the long-running operation.
 // The name is assigned by the server and is unique within the service from which the operation is created.
 func (op *ImportUserEventsOperation) Name() string {
 	return op.lro.Name()
 }

 // PurgeUserEventsOperation manages a long-running operation from PurgeUserEvents.
 type PurgeUserEventsOperation struct {
 	lro      *longrunning.Operation
 	pollPath string
 }

 // Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
 //
 // See documentation of Poll for error-handling information.
 func (op *PurgeUserEventsOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*recommendationenginepb.PurgeUserEventsResponse, error) {
 	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
 	var resp recommendationenginepb.PurgeUserEventsResponse
 	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
 		return nil, err
 	}
 	return &resp, nil
 }

 // Poll fetches the latest state of the long-running operation.
 //
 // Poll also fetches the latest metadata, which can be retrieved by Metadata.
 //
 // If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
 // the operation has completed with failure, the error is returned and op.Done will return true.
 // If Poll succeeds and the operation has completed successfully,
 // op.Done will return true, and the response of the operation is returned.
 // If Poll succeeds and the operation has not completed, the returned response and error are both nil.
 func (op *PurgeUserEventsOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*recommendationenginepb.PurgeUserEventsResponse, error) {
 	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
 	var resp recommendationenginepb.PurgeUserEventsResponse
 	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
 		return nil, err
 	}
 	if !op.Done() {
 		return nil, nil
 	}
 	return &resp, nil
 }

 // Metadata returns metadata associated with the long-running operation.
 // Metadata itself does not contact the server, but Poll does.
 // To get the latest metadata, call this method after a successful call to Poll.
 // If the metadata is not available, the returned metadata and error are both nil.
 func (op *PurgeUserEventsOperation) Metadata() (*recommendationenginepb.PurgeUserEventsMetadata, error) {
 	var meta recommendationenginepb.PurgeUserEventsMetadata
 	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
 		return nil, nil
 	} else if err != nil {
 		return nil, err
 	}
 	return &meta, nil
 }

 // Done reports whether the long-running operation has completed.
 func (op *PurgeUserEventsOperation) Done() bool {
 	return op.lro.Done()
 }

 // Name returns the name of the long-running operation.
 // The name is assigned by the server and is unique within the service from which the operation is created.
 func (op *PurgeUserEventsOperation) Name() string {
 	return op.lro.Name()
 }

 // CatalogItemIterator manages a stream of *recommendationenginepb.CatalogItem.
 type CatalogItemIterator struct {
 	items    []*recommendationenginepb.CatalogItem
 	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 []*recommendationenginepb.CatalogItem, nextPageToken string, err error)
 }

 // PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
 func (it *CatalogItemIterator) 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 *CatalogItemIterator) Next() (*recommendationenginepb.CatalogItem, error) {
 	var item *recommendationenginepb.CatalogItem
 	if err := it.nextFunc(); err != nil {
 		return item, err
 	}
 	item = it.items[0]
 	it.items = it.items[1:]
 	return item, nil
 }

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

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

 // PredictResponse_PredictionResultIterator manages a stream of *recommendationenginepb.PredictResponse_PredictionResult.
 type PredictResponse_PredictionResultIterator struct {
 	items    []*recommendationenginepb.PredictResponse_PredictionResult
 	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 []*recommendationenginepb.PredictResponse_PredictionResult, nextPageToken string, err error)
 }

 // PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
 func (it *PredictResponse_PredictionResultIterator) 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 *PredictResponse_PredictionResultIterator) Next() (*recommendationenginepb.PredictResponse_PredictionResult, error) {
 	var item *recommendationenginepb.PredictResponse_PredictionResult
 	if err := it.nextFunc(); err != nil {
 		return item, err
 	}
 	item = it.items[0]
 	it.items = it.items[1:]
 	return item, nil
 }

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

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

 // PredictionApiKeyRegistrationIterator manages a stream of *recommendationenginepb.PredictionApiKeyRegistration.
 type PredictionApiKeyRegistrationIterator struct {
 	items    []*recommendationenginepb.PredictionApiKeyRegistration
 	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 []*recommendationenginepb.PredictionApiKeyRegistration, nextPageToken string, err error)
 }

 // PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
 func (it *PredictionApiKeyRegistrationIterator) 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 *PredictionApiKeyRegistrationIterator) Next() (*recommendationenginepb.PredictionApiKeyRegistration, error) {
 	var item *recommendationenginepb.PredictionApiKeyRegistration
 	if err := it.nextFunc(); err != nil {
 		return item, err
 	}
 	item = it.items[0]
 	it.items = it.items[1:]
 	return item, nil
 }

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

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

 // UserEventIterator manages a stream of *recommendationenginepb.UserEvent.
 type UserEventIterator struct {
 	items    []*recommendationenginepb.UserEvent
 	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 []*recommendationenginepb.UserEvent, nextPageToken string, err error)
 }

 // PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
 func (it *UserEventIterator) 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 *UserEventIterator) Next() (*recommendationenginepb.UserEvent, error) {
 	var item *recommendationenginepb.UserEvent
 	if err := it.nextFunc(); err != nil {
 		return item, err
 	}
 	item = it.items[0]
 	it.items = it.items[1:]
 	return item, nil
 }

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

 func (it *UserEventIterator) takeBuf() interface{} {
 	b := it.items
 	it.items = nil
 	return b
 }
	// Copyright 2024 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 recommendationengine

	import (
	"context"
	"time"

	"cloud.google.com/go/longrunning"
	recommendationenginepb "cloud.google.com/go/recommendationengine/apiv1beta1/recommendationenginepb"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/iterator"
	)

	// ImportCatalogItemsOperation manages a long-running operation from ImportCatalogItems.
	type ImportCatalogItemsOperation struct {
	lro *longrunning.Operation
	pollPath string
	}

	// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
	//
	// See documentation of Poll for error-handling information.
	func (op ImportCatalogItemsOperation) Wait(ctx context.Context, opts ...gax.CallOption) (recommendationenginepb.ImportCatalogItemsResponse, error) {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	var resp recommendationenginepb.ImportCatalogItemsResponse
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
	return nil, err
	}
	return &resp, nil
	}

	// Poll fetches the latest state of the long-running operation.
	//
	// Poll also fetches the latest metadata, which can be retrieved by Metadata.
	//
	// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
	// the operation has completed with failure, the error is returned and op.Done will return true.
	// If Poll succeeds and the operation has completed successfully,
	// op.Done will return true, and the response of the operation is returned.
	// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
	func (op ImportCatalogItemsOperation) Poll(ctx context.Context, opts ...gax.CallOption) (recommendationenginepb.ImportCatalogItemsResponse, error) {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	var resp recommendationenginepb.ImportCatalogItemsResponse
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
	return nil, err
	}
	if !op.Done() {
	return nil, nil
	}
	return &resp, nil
	}

	// Metadata returns metadata associated with the long-running operation.
	// Metadata itself does not contact the server, but Poll does.
	// To get the latest metadata, call this method after a successful call to Poll.
	// If the metadata is not available, the returned metadata and error are both nil.
	func (op ImportCatalogItemsOperation) Metadata() (recommendationenginepb.ImportMetadata, error) {
	var meta recommendationenginepb.ImportMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
	return nil, nil
	} else if err != nil {
	return nil, err
	}
	return &meta, nil
	}

	// Done reports whether the long-running operation has completed.
	func (op *ImportCatalogItemsOperation) Done() bool {
	return op.lro.Done()
	}

	// Name returns the name of the long-running operation.
	// The name is assigned by the server and is unique within the service from which the operation is created.
	func (op *ImportCatalogItemsOperation) Name() string {
	return op.lro.Name()
	}

	// ImportUserEventsOperation manages a long-running operation from ImportUserEvents.
	type ImportUserEventsOperation struct {
	lro *longrunning.Operation
	pollPath string
	}

	// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
	//
	// See documentation of Poll for error-handling information.
	func (op ImportUserEventsOperation) Wait(ctx context.Context, opts ...gax.CallOption) (recommendationenginepb.ImportUserEventsResponse, error) {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	var resp recommendationenginepb.ImportUserEventsResponse
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
	return nil, err
	}
	return &resp, nil
	}

	// Poll fetches the latest state of the long-running operation.
	//
	// Poll also fetches the latest metadata, which can be retrieved by Metadata.
	//
	// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
	// the operation has completed with failure, the error is returned and op.Done will return true.
	// If Poll succeeds and the operation has completed successfully,
	// op.Done will return true, and the response of the operation is returned.
	// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
	func (op ImportUserEventsOperation) Poll(ctx context.Context, opts ...gax.CallOption) (recommendationenginepb.ImportUserEventsResponse, error) {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	var resp recommendationenginepb.ImportUserEventsResponse
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
	return nil, err
	}
	if !op.Done() {
	return nil, nil
	}
	return &resp, nil
	}

	// Metadata returns metadata associated with the long-running operation.
	// Metadata itself does not contact the server, but Poll does.
	// To get the latest metadata, call this method after a successful call to Poll.
	// If the metadata is not available, the returned metadata and error are both nil.
	func (op ImportUserEventsOperation) Metadata() (recommendationenginepb.ImportMetadata, error) {
	var meta recommendationenginepb.ImportMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
	return nil, nil
	} else if err != nil {
	return nil, err
	}
	return &meta, nil
	}

	// Done reports whether the long-running operation has completed.
	func (op *ImportUserEventsOperation) Done() bool {
	return op.lro.Done()
	}

	// Name returns the name of the long-running operation.
	// The name is assigned by the server and is unique within the service from which the operation is created.
	func (op *ImportUserEventsOperation) Name() string {
	return op.lro.Name()
	}

	// PurgeUserEventsOperation manages a long-running operation from PurgeUserEvents.
	type PurgeUserEventsOperation struct {
	lro *longrunning.Operation
	pollPath string
	}

	// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
	//
	// See documentation of Poll for error-handling information.
	func (op PurgeUserEventsOperation) Wait(ctx context.Context, opts ...gax.CallOption) (recommendationenginepb.PurgeUserEventsResponse, error) {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	var resp recommendationenginepb.PurgeUserEventsResponse
	if err := op.lro.WaitWithInterval(ctx, &resp, time.Minute, opts...); err != nil {
	return nil, err
	}
	return &resp, nil
	}

	// Poll fetches the latest state of the long-running operation.
	//
	// Poll also fetches the latest metadata, which can be retrieved by Metadata.
	//
	// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
	// the operation has completed with failure, the error is returned and op.Done will return true.
	// If Poll succeeds and the operation has completed successfully,
	// op.Done will return true, and the response of the operation is returned.
	// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
	func (op PurgeUserEventsOperation) Poll(ctx context.Context, opts ...gax.CallOption) (recommendationenginepb.PurgeUserEventsResponse, error) {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	var resp recommendationenginepb.PurgeUserEventsResponse
	if err := op.lro.Poll(ctx, &resp, opts...); err != nil {
	return nil, err
	}
	if !op.Done() {
	return nil, nil
	}
	return &resp, nil
	}

	// Metadata returns metadata associated with the long-running operation.
	// Metadata itself does not contact the server, but Poll does.
	// To get the latest metadata, call this method after a successful call to Poll.
	// If the metadata is not available, the returned metadata and error are both nil.
	func (op PurgeUserEventsOperation) Metadata() (recommendationenginepb.PurgeUserEventsMetadata, error) {
	var meta recommendationenginepb.PurgeUserEventsMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
	return nil, nil
	} else if err != nil {
	return nil, err
	}
	return &meta, nil
	}

	// Done reports whether the long-running operation has completed.
	func (op *PurgeUserEventsOperation) Done() bool {
	return op.lro.Done()
	}

	// Name returns the name of the long-running operation.
	// The name is assigned by the server and is unique within the service from which the operation is created.
	func (op *PurgeUserEventsOperation) Name() string {
	return op.lro.Name()
	}

	// CatalogItemIterator manages a stream of *recommendationenginepb.CatalogItem.
	type CatalogItemIterator struct {
	items []*recommendationenginepb.CatalogItem
	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 []*recommendationenginepb.CatalogItem, nextPageToken string, err error)
	}

	// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
	func (it CatalogItemIterator) 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 CatalogItemIterator) Next() (recommendationenginepb.CatalogItem, error) {
	var item *recommendationenginepb.CatalogItem
	if err := it.nextFunc(); err != nil {
	return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
	}

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

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

	// PredictResponse_PredictionResultIterator manages a stream of *recommendationenginepb.PredictResponse_PredictionResult.
	type PredictResponse_PredictionResultIterator struct {
	items []*recommendationenginepb.PredictResponse_PredictionResult
	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 []*recommendationenginepb.PredictResponse_PredictionResult, nextPageToken string, err error)
	}

	// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
	func (it PredictResponse_PredictionResultIterator) 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 PredictResponse_PredictionResultIterator) Next() (recommendationenginepb.PredictResponse_PredictionResult, error) {
	var item *recommendationenginepb.PredictResponse_PredictionResult
	if err := it.nextFunc(); err != nil {
	return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
	}

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

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

	// PredictionApiKeyRegistrationIterator manages a stream of *recommendationenginepb.PredictionApiKeyRegistration.
	type PredictionApiKeyRegistrationIterator struct {
	items []*recommendationenginepb.PredictionApiKeyRegistration
	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 []*recommendationenginepb.PredictionApiKeyRegistration, nextPageToken string, err error)
	}

	// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
	func (it PredictionApiKeyRegistrationIterator) 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 PredictionApiKeyRegistrationIterator) Next() (recommendationenginepb.PredictionApiKeyRegistration, error) {
	var item *recommendationenginepb.PredictionApiKeyRegistration
	if err := it.nextFunc(); err != nil {
	return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
	}

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

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

	// UserEventIterator manages a stream of *recommendationenginepb.UserEvent.
	type UserEventIterator struct {
	items []*recommendationenginepb.UserEvent
	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 []*recommendationenginepb.UserEvent, nextPageToken string, err error)
	}

	// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
	func (it UserEventIterator) 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 UserEventIterator) Next() (recommendationenginepb.UserEvent, error) {
	var item *recommendationenginepb.UserEvent
	if err := it.nextFunc(); err != nil {
	return item, err
	}
	item = it.items[0]
	it.items = it.items[1:]
	return item, nil
	}

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

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