auto_ml_client.go

// Copyright 2021 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 automl

import (
	"context"
	"fmt"
	"math"
	"net/url"
	"time"

	"cloud.google.com/go/longrunning"
	lroauto "cloud.google.com/go/longrunning/autogen"
	"github.com/golang/protobuf/proto"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/iterator"
	"google.golang.org/api/option"
	"google.golang.org/api/option/internaloption"
	gtransport "google.golang.org/api/transport/grpc"
	automlpb "google.golang.org/genproto/googleapis/cloud/automl/v1beta1"
	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/metadata"
)

var newClientHook clientHook

// CallOptions contains the retry settings for each method of Client.
type CallOptions struct {
	CreateDataset           []gax.CallOption
	GetDataset              []gax.CallOption
	ListDatasets            []gax.CallOption
	UpdateDataset           []gax.CallOption
	DeleteDataset           []gax.CallOption
	ImportData              []gax.CallOption
	ExportData              []gax.CallOption
	GetAnnotationSpec       []gax.CallOption
	GetTableSpec            []gax.CallOption
	ListTableSpecs          []gax.CallOption
	UpdateTableSpec         []gax.CallOption
	GetColumnSpec           []gax.CallOption
	ListColumnSpecs         []gax.CallOption
	UpdateColumnSpec        []gax.CallOption
	CreateModel             []gax.CallOption
	GetModel                []gax.CallOption
	ListModels              []gax.CallOption
	DeleteModel             []gax.CallOption
	DeployModel             []gax.CallOption
	UndeployModel           []gax.CallOption
	ExportModel             []gax.CallOption
	ExportEvaluatedExamples []gax.CallOption
	GetModelEvaluation      []gax.CallOption
	ListModelEvaluations    []gax.CallOption
}

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

func defaultCallOptions() *CallOptions {
	return &CallOptions{
		CreateDataset: []gax.CallOption{},
		GetDataset: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ListDatasets: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		UpdateDataset: []gax.CallOption{},
		DeleteDataset: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ImportData: []gax.CallOption{},
		ExportData: []gax.CallOption{},
		GetAnnotationSpec: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetTableSpec: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ListTableSpecs: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		UpdateTableSpec: []gax.CallOption{},
		GetColumnSpec: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ListColumnSpecs: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		UpdateColumnSpec: []gax.CallOption{},
		CreateModel:      []gax.CallOption{},
		GetModel: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ListModels: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		DeleteModel: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		DeployModel:             []gax.CallOption{},
		UndeployModel:           []gax.CallOption{},
		ExportModel:             []gax.CallOption{},
		ExportEvaluatedExamples: []gax.CallOption{},
		GetModelEvaluation: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
					codes.DeadlineExceeded,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ListModelEvaluations: []gax.CallOption{},
	}
}

// internalClient is an interface that defines the methods availaible from Cloud AutoML API.
type internalClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	CreateDataset(context.Context, *automlpb.CreateDatasetRequest, ...gax.CallOption) (*automlpb.Dataset, error)
	GetDataset(context.Context, *automlpb.GetDatasetRequest, ...gax.CallOption) (*automlpb.Dataset, error)
	ListDatasets(context.Context, *automlpb.ListDatasetsRequest, ...gax.CallOption) *DatasetIterator
	UpdateDataset(context.Context, *automlpb.UpdateDatasetRequest, ...gax.CallOption) (*automlpb.Dataset, error)
	DeleteDataset(context.Context, *automlpb.DeleteDatasetRequest, ...gax.CallOption) (*DeleteDatasetOperation, error)
	DeleteDatasetOperation(name string) *DeleteDatasetOperation
	ImportData(context.Context, *automlpb.ImportDataRequest, ...gax.CallOption) (*ImportDataOperation, error)
	ImportDataOperation(name string) *ImportDataOperation
	ExportData(context.Context, *automlpb.ExportDataRequest, ...gax.CallOption) (*ExportDataOperation, error)
	ExportDataOperation(name string) *ExportDataOperation
	GetAnnotationSpec(context.Context, *automlpb.GetAnnotationSpecRequest, ...gax.CallOption) (*automlpb.AnnotationSpec, error)
	GetTableSpec(context.Context, *automlpb.GetTableSpecRequest, ...gax.CallOption) (*automlpb.TableSpec, error)
	ListTableSpecs(context.Context, *automlpb.ListTableSpecsRequest, ...gax.CallOption) *TableSpecIterator
	UpdateTableSpec(context.Context, *automlpb.UpdateTableSpecRequest, ...gax.CallOption) (*automlpb.TableSpec, error)
	GetColumnSpec(context.Context, *automlpb.GetColumnSpecRequest, ...gax.CallOption) (*automlpb.ColumnSpec, error)
	ListColumnSpecs(context.Context, *automlpb.ListColumnSpecsRequest, ...gax.CallOption) *ColumnSpecIterator
	UpdateColumnSpec(context.Context, *automlpb.UpdateColumnSpecRequest, ...gax.CallOption) (*automlpb.ColumnSpec, error)
	CreateModel(context.Context, *automlpb.CreateModelRequest, ...gax.CallOption) (*CreateModelOperation, error)
	CreateModelOperation(name string) *CreateModelOperation
	GetModel(context.Context, *automlpb.GetModelRequest, ...gax.CallOption) (*automlpb.Model, error)
	ListModels(context.Context, *automlpb.ListModelsRequest, ...gax.CallOption) *ModelIterator
	DeleteModel(context.Context, *automlpb.DeleteModelRequest, ...gax.CallOption) (*DeleteModelOperation, error)
	DeleteModelOperation(name string) *DeleteModelOperation
	DeployModel(context.Context, *automlpb.DeployModelRequest, ...gax.CallOption) (*DeployModelOperation, error)
	DeployModelOperation(name string) *DeployModelOperation
	UndeployModel(context.Context, *automlpb.UndeployModelRequest, ...gax.CallOption) (*UndeployModelOperation, error)
	UndeployModelOperation(name string) *UndeployModelOperation
	ExportModel(context.Context, *automlpb.ExportModelRequest, ...gax.CallOption) (*ExportModelOperation, error)
	ExportModelOperation(name string) *ExportModelOperation
	ExportEvaluatedExamples(context.Context, *automlpb.ExportEvaluatedExamplesRequest, ...gax.CallOption) (*ExportEvaluatedExamplesOperation, error)
	ExportEvaluatedExamplesOperation(name string) *ExportEvaluatedExamplesOperation
	GetModelEvaluation(context.Context, *automlpb.GetModelEvaluationRequest, ...gax.CallOption) (*automlpb.ModelEvaluation, error)
	ListModelEvaluations(context.Context, *automlpb.ListModelEvaluationsRequest, ...gax.CallOption) *ModelEvaluationIterator
}

// Client is a client for interacting with Cloud AutoML API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// AutoML Server API.
//
// The resource names are assigned by the server.
// The server never reuses names that it has created after the resources with
// those names are deleted.
//
// An ID of a resource is the last element of the item’s resource name. For
// projects/{project_id}/locations/{location_id}/datasets/{dataset_id}, then
// the id for the item is {dataset_id}.
//
// Currently the only supported location_id is “us-central1”.
//
// On any input that is documented to expect a string parameter in
// snake_case or kebab-case, either of those cases is accepted.
type Client struct {
	// The internal transport-dependent client.
	internalClient internalClient

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

	// LROClient is used internally to handle long-running operations.
	// It is exposed so that its CallOptions can be modified if required.
	// Users should not Close this client.
	LROClient *lroauto.OperationsClient
}

// 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 *Client) 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 *Client) setGoogleClientInfo(keyval ...string) {
	c.internalClient.setGoogleClientInfo(keyval...)
}

// Connection returns a connection to the API service.
//
// Deprecated.
func (c *Client) Connection() *grpc.ClientConn {
	return c.internalClient.Connection()
}

// CreateDataset creates a dataset.
func (c *Client) CreateDataset(ctx context.Context, req *automlpb.CreateDatasetRequest, opts ...gax.CallOption) (*automlpb.Dataset, error) {
	return c.internalClient.CreateDataset(ctx, req, opts...)
}

// GetDataset gets a dataset.
func (c *Client) GetDataset(ctx context.Context, req *automlpb.GetDatasetRequest, opts ...gax.CallOption) (*automlpb.Dataset, error) {
	return c.internalClient.GetDataset(ctx, req, opts...)
}

// ListDatasets lists datasets in a project.
func (c *Client) ListDatasets(ctx context.Context, req *automlpb.ListDatasetsRequest, opts ...gax.CallOption) *DatasetIterator {
	return c.internalClient.ListDatasets(ctx, req, opts...)
}

// UpdateDataset updates a dataset.
func (c *Client) UpdateDataset(ctx context.Context, req *automlpb.UpdateDatasetRequest, opts ...gax.CallOption) (*automlpb.Dataset, error) {
	return c.internalClient.UpdateDataset(ctx, req, opts...)
}

// DeleteDataset deletes a dataset and all of its contents.
// Returns empty response in the
// response field when it completes,
// and delete_details in the
// metadata field.
func (c *Client) DeleteDataset(ctx context.Context, req *automlpb.DeleteDatasetRequest, opts ...gax.CallOption) (*DeleteDatasetOperation, error) {
	return c.internalClient.DeleteDataset(ctx, req, opts...)
}

// DeleteDatasetOperation returns a new DeleteDatasetOperation from a given name.
// The name must be that of a previously created DeleteDatasetOperation, possibly from a different process.
func (c *Client) DeleteDatasetOperation(name string) *DeleteDatasetOperation {
	return c.internalClient.DeleteDatasetOperation(name)
}

// ImportData imports data into a dataset.
// For Tables this method can only be called on an empty Dataset.
//
// For Tables:
//
//   A
//   schema_inference_version
//   parameter must be explicitly set.
//   Returns an empty response in the
//   response field when it completes.
func (c *Client) ImportData(ctx context.Context, req *automlpb.ImportDataRequest, opts ...gax.CallOption) (*ImportDataOperation, error) {
	return c.internalClient.ImportData(ctx, req, opts...)
}

// ImportDataOperation returns a new ImportDataOperation from a given name.
// The name must be that of a previously created ImportDataOperation, possibly from a different process.
func (c *Client) ImportDataOperation(name string) *ImportDataOperation {
	return c.internalClient.ImportDataOperation(name)
}

// ExportData exports dataset’s data to the provided output location.
// Returns an empty response in the
// response field when it completes.
func (c *Client) ExportData(ctx context.Context, req *automlpb.ExportDataRequest, opts ...gax.CallOption) (*ExportDataOperation, error) {
	return c.internalClient.ExportData(ctx, req, opts...)
}

// ExportDataOperation returns a new ExportDataOperation from a given name.
// The name must be that of a previously created ExportDataOperation, possibly from a different process.
func (c *Client) ExportDataOperation(name string) *ExportDataOperation {
	return c.internalClient.ExportDataOperation(name)
}

// GetAnnotationSpec gets an annotation spec.
func (c *Client) GetAnnotationSpec(ctx context.Context, req *automlpb.GetAnnotationSpecRequest, opts ...gax.CallOption) (*automlpb.AnnotationSpec, error) {
	return c.internalClient.GetAnnotationSpec(ctx, req, opts...)
}

// GetTableSpec gets a table spec.
func (c *Client) GetTableSpec(ctx context.Context, req *automlpb.GetTableSpecRequest, opts ...gax.CallOption) (*automlpb.TableSpec, error) {
	return c.internalClient.GetTableSpec(ctx, req, opts...)
}

// ListTableSpecs lists table specs in a dataset.
func (c *Client) ListTableSpecs(ctx context.Context, req *automlpb.ListTableSpecsRequest, opts ...gax.CallOption) *TableSpecIterator {
	return c.internalClient.ListTableSpecs(ctx, req, opts...)
}

// UpdateTableSpec updates a table spec.
func (c *Client) UpdateTableSpec(ctx context.Context, req *automlpb.UpdateTableSpecRequest, opts ...gax.CallOption) (*automlpb.TableSpec, error) {
	return c.internalClient.UpdateTableSpec(ctx, req, opts...)
}

// GetColumnSpec gets a column spec.
func (c *Client) GetColumnSpec(ctx context.Context, req *automlpb.GetColumnSpecRequest, opts ...gax.CallOption) (*automlpb.ColumnSpec, error) {
	return c.internalClient.GetColumnSpec(ctx, req, opts...)
}

// ListColumnSpecs lists column specs in a table spec.
func (c *Client) ListColumnSpecs(ctx context.Context, req *automlpb.ListColumnSpecsRequest, opts ...gax.CallOption) *ColumnSpecIterator {
	return c.internalClient.ListColumnSpecs(ctx, req, opts...)
}

// UpdateColumnSpec updates a column spec.
func (c *Client) UpdateColumnSpec(ctx context.Context, req *automlpb.UpdateColumnSpecRequest, opts ...gax.CallOption) (*automlpb.ColumnSpec, error) {
	return c.internalClient.UpdateColumnSpec(ctx, req, opts...)
}

// CreateModel creates a model.
// Returns a Model in the response
// field when it completes.
// When you create a model, several model evaluations are created for it:
// a global evaluation, and one evaluation for each annotation spec.
func (c *Client) CreateModel(ctx context.Context, req *automlpb.CreateModelRequest, opts ...gax.CallOption) (*CreateModelOperation, error) {
	return c.internalClient.CreateModel(ctx, req, opts...)
}

// CreateModelOperation returns a new CreateModelOperation from a given name.
// The name must be that of a previously created CreateModelOperation, possibly from a different process.
func (c *Client) CreateModelOperation(name string) *CreateModelOperation {
	return c.internalClient.CreateModelOperation(name)
}

// GetModel gets a model.
func (c *Client) GetModel(ctx context.Context, req *automlpb.GetModelRequest, opts ...gax.CallOption) (*automlpb.Model, error) {
	return c.internalClient.GetModel(ctx, req, opts...)
}

// ListModels lists models.
func (c *Client) ListModels(ctx context.Context, req *automlpb.ListModelsRequest, opts ...gax.CallOption) *ModelIterator {
	return c.internalClient.ListModels(ctx, req, opts...)
}

// DeleteModel deletes a model.
// Returns google.protobuf.Empty in the
// response field when it completes,
// and delete_details in the
// metadata field.
func (c *Client) DeleteModel(ctx context.Context, req *automlpb.DeleteModelRequest, opts ...gax.CallOption) (*DeleteModelOperation, error) {
	return c.internalClient.DeleteModel(ctx, req, opts...)
}

// DeleteModelOperation returns a new DeleteModelOperation from a given name.
// The name must be that of a previously created DeleteModelOperation, possibly from a different process.
func (c *Client) DeleteModelOperation(name string) *DeleteModelOperation {
	return c.internalClient.DeleteModelOperation(name)
}

// DeployModel deploys a model. If a model is already deployed, deploying it with the
// same parameters has no effect. Deploying with different parametrs
// (as e.g. changing
//
// node_number)
// will reset the deployment state without pausing the model’s availability.
//
// Only applicable for Text Classification, Image Object Detection , Tables, and Image Segmentation; all other domains manage
// deployment automatically.
//
// Returns an empty response in the
// response field when it completes.
func (c *Client) DeployModel(ctx context.Context, req *automlpb.DeployModelRequest, opts ...gax.CallOption) (*DeployModelOperation, error) {
	return c.internalClient.DeployModel(ctx, req, opts...)
}

// DeployModelOperation returns a new DeployModelOperation from a given name.
// The name must be that of a previously created DeployModelOperation, possibly from a different process.
func (c *Client) DeployModelOperation(name string) *DeployModelOperation {
	return c.internalClient.DeployModelOperation(name)
}

// UndeployModel undeploys a model. If the model is not deployed this method has no effect.
//
// Only applicable for Text Classification, Image Object Detection and Tables;
// all other domains manage deployment automatically.
//
// Returns an empty response in the
// response field when it completes.
func (c *Client) UndeployModel(ctx context.Context, req *automlpb.UndeployModelRequest, opts ...gax.CallOption) (*UndeployModelOperation, error) {
	return c.internalClient.UndeployModel(ctx, req, opts...)
}

// UndeployModelOperation returns a new UndeployModelOperation from a given name.
// The name must be that of a previously created UndeployModelOperation, possibly from a different process.
func (c *Client) UndeployModelOperation(name string) *UndeployModelOperation {
	return c.internalClient.UndeployModelOperation(name)
}

// ExportModel exports a trained, “export-able”, model to a user specified Google Cloud
// Storage location. A model is considered export-able if and only if it has
// an export format defined for it in
//
// ModelExportOutputConfig.
//
// Returns an empty response in the
// response field when it completes.
func (c *Client) ExportModel(ctx context.Context, req *automlpb.ExportModelRequest, opts ...gax.CallOption) (*ExportModelOperation, error) {
	return c.internalClient.ExportModel(ctx, req, opts...)
}

// ExportModelOperation returns a new ExportModelOperation from a given name.
// The name must be that of a previously created ExportModelOperation, possibly from a different process.
func (c *Client) ExportModelOperation(name string) *ExportModelOperation {
	return c.internalClient.ExportModelOperation(name)
}

// ExportEvaluatedExamples exports examples on which the model was evaluated (i.e. which were in the
// TEST set of the dataset the model was created from), together with their
// ground truth annotations and the annotations created (predicted) by the
// model.
// The examples, ground truth and predictions are exported in the state
// they were at the moment the model was evaluated.
//
// This export is available only for 30 days since the model evaluation is
// created.
//
// Currently only available for Tables.
//
// Returns an empty response in the
// response field when it completes.
func (c *Client) ExportEvaluatedExamples(ctx context.Context, req *automlpb.ExportEvaluatedExamplesRequest, opts ...gax.CallOption) (*ExportEvaluatedExamplesOperation, error) {
	return c.internalClient.ExportEvaluatedExamples(ctx, req, opts...)
}

// ExportEvaluatedExamplesOperation returns a new ExportEvaluatedExamplesOperation from a given name.
// The name must be that of a previously created ExportEvaluatedExamplesOperation, possibly from a different process.
func (c *Client) ExportEvaluatedExamplesOperation(name string) *ExportEvaluatedExamplesOperation {
	return c.internalClient.ExportEvaluatedExamplesOperation(name)
}

// GetModelEvaluation gets a model evaluation.
func (c *Client) GetModelEvaluation(ctx context.Context, req *automlpb.GetModelEvaluationRequest, opts ...gax.CallOption) (*automlpb.ModelEvaluation, error) {
	return c.internalClient.GetModelEvaluation(ctx, req, opts...)
}

// ListModelEvaluations lists model evaluations.
func (c *Client) ListModelEvaluations(ctx context.Context, req *automlpb.ListModelEvaluationsRequest, opts ...gax.CallOption) *ModelEvaluationIterator {
	return c.internalClient.ListModelEvaluations(ctx, req, opts...)
}

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

	// flag to opt out of default deadlines via GOOGLE_API_GO_EXPERIMENTAL_DISABLE_DEFAULT_DEADLINE
	disableDeadlines bool

	// Points back to the CallOptions field of the containing Client
	CallOptions **CallOptions

	// The gRPC API client.
	client automlpb.AutoMlClient

	// LROClient is used internally to handle long-running operations.
	// It is exposed so that its CallOptions can be modified if required.
	// Users should not Close this client.
	LROClient **lroauto.OperationsClient

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

// NewClient creates a new auto ml client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// AutoML Server API.
//
// The resource names are assigned by the server.
// The server never reuses names that it has created after the resources with
// those names are deleted.
//
// An ID of a resource is the last element of the item’s resource name. For
// projects/{project_id}/locations/{location_id}/datasets/{dataset_id}, then
// the id for the item is {dataset_id}.
//
// Currently the only supported location_id is “us-central1”.
//
// On any input that is documented to expect a string parameter in
// snake_case or kebab-case, either of those cases is accepted.
func NewClient(ctx context.Context, opts ...option.ClientOption) (*Client, error) {
	clientOpts := defaultGRPCClientOptions()
	if newClientHook != nil {
		hookOpts, err := newClientHook(ctx, clientHookParams{})
		if err != nil {
			return nil, err
		}
		clientOpts = append(clientOpts, hookOpts...)
	}

	disableDeadlines, err := checkDisableDeadlines()
	if err != nil {
		return nil, err
	}

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

	c := &gRPCClient{
		connPool:         connPool,
		disableDeadlines: disableDeadlines,
		client:           automlpb.NewAutoMlClient(connPool),
		CallOptions:      &client.CallOptions,
	}
	c.setGoogleClientInfo()

	client.internalClient = c

	client.LROClient, err = lroauto.NewOperationsClient(ctx, gtransport.WithConnPool(connPool))
	if err != nil {
		// This error "should not happen", since we are just reusing old connection pool
		// and never actually need to dial.
		// If this does happen, we could leak connp. However, we cannot close conn:
		// If the user invoked the constructor with option.WithGRPCConn,
		// we would close a connection that's still in use.
		// TODO: investigate error conditions.
		return nil, err
	}
	c.LROClient = &client.LROClient
	return &client, nil
}

// Connection returns a connection to the API service.
//
// Deprecated.
func (c *gRPCClient) 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 *gRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", versionGo()}, keyval...)
	kv = append(kv, "gapic", versionClient, "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 *gRPCClient) Close() error {
	return c.connPool.Close()
}

func (c *gRPCClient) CreateDataset(ctx context.Context, req *automlpb.CreateDatasetRequest, opts ...gax.CallOption) (*automlpb.Dataset, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.CreateDataset(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) GetDataset(ctx context.Context, req *automlpb.GetDatasetRequest, opts ...gax.CallOption) (*automlpb.Dataset, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetDataset(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

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{}
	req = proto.Clone(req).(*automlpb.ListDatasetsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*automlpb.Dataset, string, error) {
		var resp *automlpb.ListDatasetsResponse
		req.PageToken = pageToken
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.client.ListDatasets(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetDatasets(), 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 *gRPCClient) UpdateDataset(ctx context.Context, req *automlpb.UpdateDatasetRequest, opts ...gax.CallOption) (*automlpb.Dataset, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.UpdateDataset(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) DeleteDataset(ctx context.Context, req *automlpb.DeleteDatasetRequest, opts ...gax.CallOption) (*DeleteDatasetOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.DeleteDataset(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeleteDatasetOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) ImportData(ctx context.Context, req *automlpb.ImportDataRequest, opts ...gax.CallOption) (*ImportDataOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.ImportData(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &ImportDataOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) ExportData(ctx context.Context, req *automlpb.ExportDataRequest, opts ...gax.CallOption) (*ExportDataOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.ExportData(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &ExportDataOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) GetAnnotationSpec(ctx context.Context, req *automlpb.GetAnnotationSpecRequest, opts ...gax.CallOption) (*automlpb.AnnotationSpec, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetAnnotationSpec(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) GetTableSpec(ctx context.Context, req *automlpb.GetTableSpecRequest, opts ...gax.CallOption) (*automlpb.TableSpec, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetTableSpec(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

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{}
	req = proto.Clone(req).(*automlpb.ListTableSpecsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*automlpb.TableSpec, string, error) {
		var resp *automlpb.ListTableSpecsResponse
		req.PageToken = pageToken
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.client.ListTableSpecs(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetTableSpecs(), 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 *gRPCClient) UpdateTableSpec(ctx context.Context, req *automlpb.UpdateTableSpecRequest, opts ...gax.CallOption) (*automlpb.TableSpec, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.UpdateTableSpec(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) GetColumnSpec(ctx context.Context, req *automlpb.GetColumnSpecRequest, opts ...gax.CallOption) (*automlpb.ColumnSpec, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetColumnSpec(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

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{}
	req = proto.Clone(req).(*automlpb.ListColumnSpecsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*automlpb.ColumnSpec, string, error) {
		var resp *automlpb.ListColumnSpecsResponse
		req.PageToken = pageToken
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.client.ListColumnSpecs(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetColumnSpecs(), 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 *gRPCClient) UpdateColumnSpec(ctx context.Context, req *automlpb.UpdateColumnSpecRequest, opts ...gax.CallOption) (*automlpb.ColumnSpec, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.UpdateColumnSpec(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) CreateModel(ctx context.Context, req *automlpb.CreateModelRequest, opts ...gax.CallOption) (*CreateModelOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.CreateModel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreateModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) GetModel(ctx context.Context, req *automlpb.GetModelRequest, opts ...gax.CallOption) (*automlpb.Model, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetModel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

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{}
	req = proto.Clone(req).(*automlpb.ListModelsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*automlpb.Model, string, error) {
		var resp *automlpb.ListModelsResponse
		req.PageToken = pageToken
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.client.ListModels(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetModel(), 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 *gRPCClient) DeleteModel(ctx context.Context, req *automlpb.DeleteModelRequest, opts ...gax.CallOption) (*DeleteModelOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.DeleteModel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeleteModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) DeployModel(ctx context.Context, req *automlpb.DeployModelRequest, opts ...gax.CallOption) (*DeployModelOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.DeployModel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeployModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) UndeployModel(ctx context.Context, req *automlpb.UndeployModelRequest, opts ...gax.CallOption) (*UndeployModelOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.UndeployModel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &UndeployModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) ExportModel(ctx context.Context, req *automlpb.ExportModelRequest, opts ...gax.CallOption) (*ExportModelOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.ExportModel(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &ExportModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) ExportEvaluatedExamples(ctx context.Context, req *automlpb.ExportEvaluatedExamplesRequest, opts ...gax.CallOption) (*ExportEvaluatedExamplesOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.ExportEvaluatedExamples(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &ExportEvaluatedExamplesOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) GetModelEvaluation(ctx context.Context, req *automlpb.GetModelEvaluationRequest, opts ...gax.CallOption) (*automlpb.ModelEvaluation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 5000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.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
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetModelEvaluation(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

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{}
	req = proto.Clone(req).(*automlpb.ListModelEvaluationsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*automlpb.ModelEvaluation, string, error) {
		var resp *automlpb.ListModelEvaluationsResponse
		req.PageToken = pageToken
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.client.ListModelEvaluations(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetModelEvaluation(), 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
}

// CreateModelOperation manages a long-running operation from CreateModel.
type CreateModelOperation struct {
	lro *longrunning.Operation
}

// CreateModelOperation returns a new CreateModelOperation from a given name.
// The name must be that of a previously created CreateModelOperation, possibly from a different process.
func (c *gRPCClient) CreateModelOperation(name string) *CreateModelOperation {
	return &CreateModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// 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 *CreateModelOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*automlpb.Model, error) {
	var resp automlpb.Model
	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 *CreateModelOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*automlpb.Model, error) {
	var resp automlpb.Model
	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 *CreateModelOperation) Metadata() (*automlpb.OperationMetadata, error) {
	var meta automlpb.OperationMetadata
	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 *CreateModelOperation) 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 *CreateModelOperation) Name() string {
	return op.lro.Name()
}

// DeleteDatasetOperation manages a long-running operation from DeleteDataset.
type DeleteDatasetOperation struct {
	lro *longrunning.Operation
}

// DeleteDatasetOperation returns a new DeleteDatasetOperation from a given name.
// The name must be that of a previously created DeleteDatasetOperation, possibly from a different process.
func (c *gRPCClient) DeleteDatasetOperation(name string) *DeleteDatasetOperation {
	return &DeleteDatasetOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// 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 *DeleteDatasetOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// 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 *DeleteDatasetOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

// 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 *DeleteDatasetOperation) Metadata() (*automlpb.OperationMetadata, error) {
	var meta automlpb.OperationMetadata
	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 *DeleteDatasetOperation) 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 *DeleteDatasetOperation) Name() string {
	return op.lro.Name()
}

// DeleteModelOperation manages a long-running operation from DeleteModel.
type DeleteModelOperation struct {
	lro *longrunning.Operation
}

// DeleteModelOperation returns a new DeleteModelOperation from a given name.
// The name must be that of a previously created DeleteModelOperation, possibly from a different process.
func (c *gRPCClient) DeleteModelOperation(name string) *DeleteModelOperation {
	return &DeleteModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// 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 *DeleteModelOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// 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 *DeleteModelOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

// 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 *DeleteModelOperation) Metadata() (*automlpb.OperationMetadata, error) {
	var meta automlpb.OperationMetadata
	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 *DeleteModelOperation) 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 *DeleteModelOperation) Name() string {
	return op.lro.Name()
}

// DeployModelOperation manages a long-running operation from DeployModel.
type DeployModelOperation struct {
	lro *longrunning.Operation
}

// DeployModelOperation returns a new DeployModelOperation from a given name.
// The name must be that of a previously created DeployModelOperation, possibly from a different process.
func (c *gRPCClient) DeployModelOperation(name string) *DeployModelOperation {
	return &DeployModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// 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 *DeployModelOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// 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 *DeployModelOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

// 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 *DeployModelOperation) Metadata() (*automlpb.OperationMetadata, error) {
	var meta automlpb.OperationMetadata
	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 *DeployModelOperation) 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 *DeployModelOperation) Name() string {
	return op.lro.Name()
}

// ExportDataOperation manages a long-running operation from ExportData.
type ExportDataOperation struct {
	lro *longrunning.Operation
}

// ExportDataOperation returns a new ExportDataOperation from a given name.
// The name must be that of a previously created ExportDataOperation, possibly from a different process.
func (c *gRPCClient) ExportDataOperation(name string) *ExportDataOperation {
	return &ExportDataOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// 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 *ExportDataOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// 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 *ExportDataOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

// 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 *ExportDataOperation) Metadata() (*automlpb.OperationMetadata, error) {
	var meta automlpb.OperationMetadata
	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 *ExportDataOperation) 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 *ExportDataOperation) Name() string {
	return op.lro.Name()
}

// ExportEvaluatedExamplesOperation manages a long-running operation from ExportEvaluatedExamples.
type ExportEvaluatedExamplesOperation struct {
	lro *longrunning.Operation
}

// ExportEvaluatedExamplesOperation returns a new ExportEvaluatedExamplesOperation from a given name.
// The name must be that of a previously created ExportEvaluatedExamplesOperation, possibly from a different process.
func (c *gRPCClient) ExportEvaluatedExamplesOperation(name string) *ExportEvaluatedExamplesOperation {
	return &ExportEvaluatedExamplesOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// 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 *ExportEvaluatedExamplesOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// 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 *ExportEvaluatedExamplesOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

// 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 *ExportEvaluatedExamplesOperation) Metadata() (*automlpb.OperationMetadata, error) {
	var meta automlpb.OperationMetadata
	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 *ExportEvaluatedExamplesOperation) 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 *ExportEvaluatedExamplesOperation) Name() string {
	return op.lro.Name()
}

// ExportModelOperation manages a long-running operation from ExportModel.
type ExportModelOperation struct {
	lro *longrunning.Operation
}

// ExportModelOperation returns a new ExportModelOperation from a given name.
// The name must be that of a previously created ExportModelOperation, possibly from a different process.
func (c *gRPCClient) ExportModelOperation(name string) *ExportModelOperation {
	return &ExportModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// 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 *ExportModelOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// 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 *ExportModelOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

// 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 *ExportModelOperation) Metadata() (*automlpb.OperationMetadata, error) {
	var meta automlpb.OperationMetadata
	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 *ExportModelOperation) 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 *ExportModelOperation) Name() string {
	return op.lro.Name()
}

// ImportDataOperation manages a long-running operation from ImportData.
type ImportDataOperation struct {
	lro *longrunning.Operation
}

// ImportDataOperation returns a new ImportDataOperation from a given name.
// The name must be that of a previously created ImportDataOperation, possibly from a different process.
func (c *gRPCClient) ImportDataOperation(name string) *ImportDataOperation {
	return &ImportDataOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// 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 *ImportDataOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// 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 *ImportDataOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

// 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 *ImportDataOperation) Metadata() (*automlpb.OperationMetadata, error) {
	var meta automlpb.OperationMetadata
	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 *ImportDataOperation) 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 *ImportDataOperation) Name() string {
	return op.lro.Name()
}

// UndeployModelOperation manages a long-running operation from UndeployModel.
type UndeployModelOperation struct {
	lro *longrunning.Operation
}

// UndeployModelOperation returns a new UndeployModelOperation from a given name.
// The name must be that of a previously created UndeployModelOperation, possibly from a different process.
func (c *gRPCClient) UndeployModelOperation(name string) *UndeployModelOperation {
	return &UndeployModelOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
	}
}

// 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 *UndeployModelOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// 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 *UndeployModelOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

// 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 *UndeployModelOperation) Metadata() (*automlpb.OperationMetadata, error) {
	var meta automlpb.OperationMetadata
	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 *UndeployModelOperation) 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 *UndeployModelOperation) Name() string {
	return op.lro.Name()
}

// ColumnSpecIterator manages a stream of *automlpb.ColumnSpec.
type ColumnSpecIterator struct {
	items    []*automlpb.ColumnSpec
	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 []*automlpb.ColumnSpec, nextPageToken string, err error)
}

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

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

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

// DatasetIterator manages a stream of *automlpb.Dataset.
type DatasetIterator struct {
	items    []*automlpb.Dataset
	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 []*automlpb.Dataset, nextPageToken string, err error)
}

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

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

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

// ModelEvaluationIterator manages a stream of *automlpb.ModelEvaluation.
type ModelEvaluationIterator struct {
	items    []*automlpb.ModelEvaluation
	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 []*automlpb.ModelEvaluation, nextPageToken string, err error)
}

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

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

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

// ModelIterator manages a stream of *automlpb.Model.
type ModelIterator struct {
	items    []*automlpb.Model
	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 []*automlpb.Model, nextPageToken string, err error)
}

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

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

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

// TableSpecIterator manages a stream of *automlpb.TableSpec.
type TableSpecIterator struct {
	items    []*automlpb.TableSpec
	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 []*automlpb.TableSpec, nextPageToken string, err error)
}

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

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

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