// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Code generated by protoc-gen-go_gapic. DO NOT EDIT.

package dialogflow

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

	dialogflowpb "cloud.google.com/go/dialogflow/apiv2/dialogflowpb"
	"cloud.google.com/go/longrunning"
	lroauto "cloud.google.com/go/longrunning/autogen"
	longrunningpb "cloud.google.com/go/longrunning/autogen/longrunningpb"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/googleapi"
	"google.golang.org/api/iterator"
	"google.golang.org/api/option"
	"google.golang.org/api/option/internaloption"
	gtransport "google.golang.org/api/transport/grpc"
	httptransport "google.golang.org/api/transport/http"
	locationpb "google.golang.org/genproto/googleapis/cloud/location"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/encoding/protojson"
	"google.golang.org/protobuf/proto"
	structpb "google.golang.org/protobuf/types/known/structpb"
)

var newEntityTypesClientHook clientHook

// EntityTypesCallOptions contains the retry settings for each method of EntityTypesClient.
type EntityTypesCallOptions struct {
	ListEntityTypes        []gax.CallOption
	GetEntityType          []gax.CallOption
	CreateEntityType       []gax.CallOption
	UpdateEntityType       []gax.CallOption
	DeleteEntityType       []gax.CallOption
	BatchUpdateEntityTypes []gax.CallOption
	BatchDeleteEntityTypes []gax.CallOption
	BatchCreateEntities    []gax.CallOption
	BatchUpdateEntities    []gax.CallOption
	BatchDeleteEntities    []gax.CallOption
	GetLocation            []gax.CallOption
	ListLocations          []gax.CallOption
	CancelOperation        []gax.CallOption
	GetOperation           []gax.CallOption
	ListOperations         []gax.CallOption
}

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

func defaultEntityTypesCallOptions() *EntityTypesCallOptions {
	return &EntityTypesCallOptions{
		ListEntityTypes: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetEntityType: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		CreateEntityType: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		UpdateEntityType: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		DeleteEntityType: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		BatchUpdateEntityTypes: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		BatchDeleteEntityTypes: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		BatchCreateEntities: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		BatchUpdateEntities: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		BatchDeleteEntities: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetLocation:     []gax.CallOption{},
		ListLocations:   []gax.CallOption{},
		CancelOperation: []gax.CallOption{},
		GetOperation:    []gax.CallOption{},
		ListOperations:  []gax.CallOption{},
	}
}

func defaultEntityTypesRESTCallOptions() *EntityTypesCallOptions {
	return &EntityTypesCallOptions{
		ListEntityTypes: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		GetEntityType: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		CreateEntityType: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		UpdateEntityType: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		DeleteEntityType: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		BatchUpdateEntityTypes: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		BatchDeleteEntityTypes: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		BatchCreateEntities: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		BatchUpdateEntities: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		BatchDeleteEntities: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnHTTPCodes(gax.Backoff{
					Initial:    100 * time.Millisecond,
					Max:        60000 * time.Millisecond,
					Multiplier: 1.30,
				},
					http.StatusServiceUnavailable)
			}),
		},
		GetLocation:     []gax.CallOption{},
		ListLocations:   []gax.CallOption{},
		CancelOperation: []gax.CallOption{},
		GetOperation:    []gax.CallOption{},
		ListOperations:  []gax.CallOption{},
	}
}

// internalEntityTypesClient is an interface that defines the methods available from Dialogflow API.
type internalEntityTypesClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	ListEntityTypes(context.Context, *dialogflowpb.ListEntityTypesRequest, ...gax.CallOption) *EntityTypeIterator
	GetEntityType(context.Context, *dialogflowpb.GetEntityTypeRequest, ...gax.CallOption) (*dialogflowpb.EntityType, error)
	CreateEntityType(context.Context, *dialogflowpb.CreateEntityTypeRequest, ...gax.CallOption) (*dialogflowpb.EntityType, error)
	UpdateEntityType(context.Context, *dialogflowpb.UpdateEntityTypeRequest, ...gax.CallOption) (*dialogflowpb.EntityType, error)
	DeleteEntityType(context.Context, *dialogflowpb.DeleteEntityTypeRequest, ...gax.CallOption) error
	BatchUpdateEntityTypes(context.Context, *dialogflowpb.BatchUpdateEntityTypesRequest, ...gax.CallOption) (*BatchUpdateEntityTypesOperation, error)
	BatchUpdateEntityTypesOperation(name string) *BatchUpdateEntityTypesOperation
	BatchDeleteEntityTypes(context.Context, *dialogflowpb.BatchDeleteEntityTypesRequest, ...gax.CallOption) (*BatchDeleteEntityTypesOperation, error)
	BatchDeleteEntityTypesOperation(name string) *BatchDeleteEntityTypesOperation
	BatchCreateEntities(context.Context, *dialogflowpb.BatchCreateEntitiesRequest, ...gax.CallOption) (*BatchCreateEntitiesOperation, error)
	BatchCreateEntitiesOperation(name string) *BatchCreateEntitiesOperation
	BatchUpdateEntities(context.Context, *dialogflowpb.BatchUpdateEntitiesRequest, ...gax.CallOption) (*BatchUpdateEntitiesOperation, error)
	BatchUpdateEntitiesOperation(name string) *BatchUpdateEntitiesOperation
	BatchDeleteEntities(context.Context, *dialogflowpb.BatchDeleteEntitiesRequest, ...gax.CallOption) (*BatchDeleteEntitiesOperation, error)
	BatchDeleteEntitiesOperation(name string) *BatchDeleteEntitiesOperation
	GetLocation(context.Context, *locationpb.GetLocationRequest, ...gax.CallOption) (*locationpb.Location, error)
	ListLocations(context.Context, *locationpb.ListLocationsRequest, ...gax.CallOption) *LocationIterator
	CancelOperation(context.Context, *longrunningpb.CancelOperationRequest, ...gax.CallOption) error
	GetOperation(context.Context, *longrunningpb.GetOperationRequest, ...gax.CallOption) (*longrunningpb.Operation, error)
	ListOperations(context.Context, *longrunningpb.ListOperationsRequest, ...gax.CallOption) *OperationIterator
}

// EntityTypesClient is a client for interacting with Dialogflow API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// Service for managing EntityTypes.
type EntityTypesClient struct {
	// The internal transport-dependent client.
	internalClient internalEntityTypesClient

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

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

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

// ListEntityTypes returns the list of all entity types in the specified agent.
func (c *EntityTypesClient) ListEntityTypes(ctx context.Context, req *dialogflowpb.ListEntityTypesRequest, opts ...gax.CallOption) *EntityTypeIterator {
	return c.internalClient.ListEntityTypes(ctx, req, opts...)
}

// GetEntityType retrieves the specified entity type.
func (c *EntityTypesClient) GetEntityType(ctx context.Context, req *dialogflowpb.GetEntityTypeRequest, opts ...gax.CallOption) (*dialogflowpb.EntityType, error) {
	return c.internalClient.GetEntityType(ctx, req, opts...)
}

// CreateEntityType creates an entity type in the specified agent.
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *EntityTypesClient) CreateEntityType(ctx context.Context, req *dialogflowpb.CreateEntityTypeRequest, opts ...gax.CallOption) (*dialogflowpb.EntityType, error) {
	return c.internalClient.CreateEntityType(ctx, req, opts...)
}

// UpdateEntityType updates the specified entity type.
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *EntityTypesClient) UpdateEntityType(ctx context.Context, req *dialogflowpb.UpdateEntityTypeRequest, opts ...gax.CallOption) (*dialogflowpb.EntityType, error) {
	return c.internalClient.UpdateEntityType(ctx, req, opts...)
}

// DeleteEntityType deletes the specified entity type.
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *EntityTypesClient) DeleteEntityType(ctx context.Context, req *dialogflowpb.DeleteEntityTypeRequest, opts ...gax.CallOption) error {
	return c.internalClient.DeleteEntityType(ctx, req, opts...)
}

// BatchUpdateEntityTypes updates/Creates multiple entity types in the specified agent.
//
// This method is a long-running
// operation (at https://cloud.google.com/dialogflow/es/docs/how/long-running-operations).
// The returned Operation type has the following method-specific fields:
//
//	metadata: An empty Struct
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct)
//
//	response:
//	BatchUpdateEntityTypesResponse
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *EntityTypesClient) BatchUpdateEntityTypes(ctx context.Context, req *dialogflowpb.BatchUpdateEntityTypesRequest, opts ...gax.CallOption) (*BatchUpdateEntityTypesOperation, error) {
	return c.internalClient.BatchUpdateEntityTypes(ctx, req, opts...)
}

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

// BatchDeleteEntityTypes deletes entity types in the specified agent.
//
// This method is a long-running
// operation (at https://cloud.google.com/dialogflow/es/docs/how/long-running-operations).
// The returned Operation type has the following method-specific fields:
//
//	metadata: An empty Struct
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct)
//
//	response: An Empty
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#empty)
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *EntityTypesClient) BatchDeleteEntityTypes(ctx context.Context, req *dialogflowpb.BatchDeleteEntityTypesRequest, opts ...gax.CallOption) (*BatchDeleteEntityTypesOperation, error) {
	return c.internalClient.BatchDeleteEntityTypes(ctx, req, opts...)
}

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

// BatchCreateEntities creates multiple new entities in the specified entity type.
//
// This method is a long-running
// operation (at https://cloud.google.com/dialogflow/es/docs/how/long-running-operations).
// The returned Operation type has the following method-specific fields:
//
//	metadata: An empty Struct
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct)
//
//	response: An Empty
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#empty)
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *EntityTypesClient) BatchCreateEntities(ctx context.Context, req *dialogflowpb.BatchCreateEntitiesRequest, opts ...gax.CallOption) (*BatchCreateEntitiesOperation, error) {
	return c.internalClient.BatchCreateEntities(ctx, req, opts...)
}

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

// BatchUpdateEntities updates or creates multiple entities in the specified entity type. This
// method does not affect entities in the entity type that aren’t explicitly
// specified in the request.
//
// This method is a long-running
// operation (at https://cloud.google.com/dialogflow/es/docs/how/long-running-operations).
// The returned Operation type has the following method-specific fields:
//
//	metadata: An empty Struct
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct)
//
//	response: An Empty
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#empty)
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *EntityTypesClient) BatchUpdateEntities(ctx context.Context, req *dialogflowpb.BatchUpdateEntitiesRequest, opts ...gax.CallOption) (*BatchUpdateEntitiesOperation, error) {
	return c.internalClient.BatchUpdateEntities(ctx, req, opts...)
}

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

// BatchDeleteEntities deletes entities in the specified entity type.
//
// This method is a long-running
// operation (at https://cloud.google.com/dialogflow/es/docs/how/long-running-operations).
// The returned Operation type has the following method-specific fields:
//
//	metadata: An empty Struct
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct)
//
//	response: An Empty
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#empty)
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *EntityTypesClient) BatchDeleteEntities(ctx context.Context, req *dialogflowpb.BatchDeleteEntitiesRequest, opts ...gax.CallOption) (*BatchDeleteEntitiesOperation, error) {
	return c.internalClient.BatchDeleteEntities(ctx, req, opts...)
}

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

// GetLocation gets information about a location.
func (c *EntityTypesClient) GetLocation(ctx context.Context, req *locationpb.GetLocationRequest, opts ...gax.CallOption) (*locationpb.Location, error) {
	return c.internalClient.GetLocation(ctx, req, opts...)
}

// ListLocations lists information about the supported locations for this service.
func (c *EntityTypesClient) ListLocations(ctx context.Context, req *locationpb.ListLocationsRequest, opts ...gax.CallOption) *LocationIterator {
	return c.internalClient.ListLocations(ctx, req, opts...)
}

// CancelOperation is a utility method from google.longrunning.Operations.
func (c *EntityTypesClient) CancelOperation(ctx context.Context, req *longrunningpb.CancelOperationRequest, opts ...gax.CallOption) error {
	return c.internalClient.CancelOperation(ctx, req, opts...)
}

// GetOperation is a utility method from google.longrunning.Operations.
func (c *EntityTypesClient) GetOperation(ctx context.Context, req *longrunningpb.GetOperationRequest, opts ...gax.CallOption) (*longrunningpb.Operation, error) {
	return c.internalClient.GetOperation(ctx, req, opts...)
}

// ListOperations lists operations that match the specified filter in the request. If
// the server doesn’t support this method, it returns UNIMPLEMENTED.
func (c *EntityTypesClient) ListOperations(ctx context.Context, req *longrunningpb.ListOperationsRequest, opts ...gax.CallOption) *OperationIterator {
	return c.internalClient.ListOperations(ctx, req, opts...)
}

// entityTypesGRPCClient is a client for interacting with Dialogflow API over gRPC transport.
//
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type entityTypesGRPCClient 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 EntityTypesClient
	CallOptions **EntityTypesCallOptions

	// The gRPC API client.
	entityTypesClient dialogflowpb.EntityTypesClient

	// 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

	operationsClient longrunningpb.OperationsClient

	locationsClient locationpb.LocationsClient

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

// NewEntityTypesClient creates a new entity types client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// Service for managing EntityTypes.
func NewEntityTypesClient(ctx context.Context, opts ...option.ClientOption) (*EntityTypesClient, error) {
	clientOpts := defaultEntityTypesGRPCClientOptions()
	if newEntityTypesClientHook != nil {
		hookOpts, err := newEntityTypesClientHook(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 := EntityTypesClient{CallOptions: defaultEntityTypesCallOptions()}

	c := &entityTypesGRPCClient{
		connPool:          connPool,
		disableDeadlines:  disableDeadlines,
		entityTypesClient: dialogflowpb.NewEntityTypesClient(connPool),
		CallOptions:       &client.CallOptions,
		operationsClient:  longrunningpb.NewOperationsClient(connPool),
		locationsClient:   locationpb.NewLocationsClient(connPool),
	}
	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: Connections are now pooled so this method does not always
// return the same resource.
func (c *entityTypesGRPCClient) 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 *entityTypesGRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", versionGo()}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version)
	c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
}

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

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

	// The http client.
	httpClient *http.Client

	// 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

	// Points back to the CallOptions field of the containing EntityTypesClient
	CallOptions **EntityTypesCallOptions
}

// NewEntityTypesRESTClient creates a new entity types rest client.
//
// Service for managing EntityTypes.
func NewEntityTypesRESTClient(ctx context.Context, opts ...option.ClientOption) (*EntityTypesClient, error) {
	clientOpts := append(defaultEntityTypesRESTClientOptions(), opts...)
	httpClient, endpoint, err := httptransport.NewClient(ctx, clientOpts...)
	if err != nil {
		return nil, err
	}

	callOpts := defaultEntityTypesRESTCallOptions()
	c := &entityTypesRESTClient{
		endpoint:    endpoint,
		httpClient:  httpClient,
		CallOptions: &callOpts,
	}
	c.setGoogleClientInfo()

	lroOpts := []option.ClientOption{
		option.WithHTTPClient(httpClient),
		option.WithEndpoint(endpoint),
	}
	opClient, err := lroauto.NewOperationsRESTClient(ctx, lroOpts...)
	if err != nil {
		return nil, err
	}
	c.LROClient = &opClient

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

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

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

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

// Connection returns a connection to the API service.
//
// Deprecated: This method always returns nil.
func (c *entityTypesRESTClient) Connection() *grpc.ClientConn {
	return nil
}
func (c *entityTypesGRPCClient) ListEntityTypes(ctx context.Context, req *dialogflowpb.ListEntityTypesRequest, opts ...gax.CallOption) *EntityTypeIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListEntityTypes[0:len((*c.CallOptions).ListEntityTypes):len((*c.CallOptions).ListEntityTypes)], opts...)
	it := &EntityTypeIterator{}
	req = proto.Clone(req).(*dialogflowpb.ListEntityTypesRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*dialogflowpb.EntityType, string, error) {
		resp := &dialogflowpb.ListEntityTypesResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.entityTypesClient.ListEntityTypes(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetEntityTypes(), 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 *entityTypesGRPCClient) GetEntityType(ctx context.Context, req *dialogflowpb.GetEntityTypeRequest, opts ...gax.CallOption) (*dialogflowpb.EntityType, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*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).GetEntityType[0:len((*c.CallOptions).GetEntityType):len((*c.CallOptions).GetEntityType)], opts...)
	var resp *dialogflowpb.EntityType
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.entityTypesClient.GetEntityType(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *entityTypesGRPCClient) CreateEntityType(ctx context.Context, req *dialogflowpb.CreateEntityTypeRequest, opts ...gax.CallOption) (*dialogflowpb.EntityType, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*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).CreateEntityType[0:len((*c.CallOptions).CreateEntityType):len((*c.CallOptions).CreateEntityType)], opts...)
	var resp *dialogflowpb.EntityType
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.entityTypesClient.CreateEntityType(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *entityTypesGRPCClient) UpdateEntityType(ctx context.Context, req *dialogflowpb.UpdateEntityTypeRequest, opts ...gax.CallOption) (*dialogflowpb.EntityType, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*time.Millisecond)
		defer cancel()
		ctx = cctx
	}
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "entity_type.name", url.QueryEscape(req.GetEntityType().GetName())))

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

func (c *entityTypesGRPCClient) DeleteEntityType(ctx context.Context, req *dialogflowpb.DeleteEntityTypeRequest, opts ...gax.CallOption) error {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*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).DeleteEntityType[0:len((*c.CallOptions).DeleteEntityType):len((*c.CallOptions).DeleteEntityType)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		_, err = c.entityTypesClient.DeleteEntityType(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	return err
}

func (c *entityTypesGRPCClient) BatchUpdateEntityTypes(ctx context.Context, req *dialogflowpb.BatchUpdateEntityTypesRequest, opts ...gax.CallOption) (*BatchUpdateEntityTypesOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*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).BatchUpdateEntityTypes[0:len((*c.CallOptions).BatchUpdateEntityTypes):len((*c.CallOptions).BatchUpdateEntityTypes)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.entityTypesClient.BatchUpdateEntityTypes(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &BatchUpdateEntityTypesOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *entityTypesGRPCClient) BatchDeleteEntityTypes(ctx context.Context, req *dialogflowpb.BatchDeleteEntityTypesRequest, opts ...gax.CallOption) (*BatchDeleteEntityTypesOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*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).BatchDeleteEntityTypes[0:len((*c.CallOptions).BatchDeleteEntityTypes):len((*c.CallOptions).BatchDeleteEntityTypes)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.entityTypesClient.BatchDeleteEntityTypes(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &BatchDeleteEntityTypesOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *entityTypesGRPCClient) BatchCreateEntities(ctx context.Context, req *dialogflowpb.BatchCreateEntitiesRequest, opts ...gax.CallOption) (*BatchCreateEntitiesOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*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).BatchCreateEntities[0:len((*c.CallOptions).BatchCreateEntities):len((*c.CallOptions).BatchCreateEntities)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.entityTypesClient.BatchCreateEntities(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &BatchCreateEntitiesOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *entityTypesGRPCClient) BatchUpdateEntities(ctx context.Context, req *dialogflowpb.BatchUpdateEntitiesRequest, opts ...gax.CallOption) (*BatchUpdateEntitiesOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*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).BatchUpdateEntities[0:len((*c.CallOptions).BatchUpdateEntities):len((*c.CallOptions).BatchUpdateEntities)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.entityTypesClient.BatchUpdateEntities(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &BatchUpdateEntitiesOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *entityTypesGRPCClient) BatchDeleteEntities(ctx context.Context, req *dialogflowpb.BatchDeleteEntitiesRequest, opts ...gax.CallOption) (*BatchDeleteEntitiesOperation, error) {
	if _, ok := ctx.Deadline(); !ok && !c.disableDeadlines {
		cctx, cancel := context.WithTimeout(ctx, 60000*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).BatchDeleteEntities[0:len((*c.CallOptions).BatchDeleteEntities):len((*c.CallOptions).BatchDeleteEntities)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.entityTypesClient.BatchDeleteEntities(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &BatchDeleteEntitiesOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *entityTypesGRPCClient) GetLocation(ctx context.Context, req *locationpb.GetLocationRequest, opts ...gax.CallOption) (*locationpb.Location, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

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

func (c *entityTypesGRPCClient) ListLocations(ctx context.Context, req *locationpb.ListLocationsRequest, opts ...gax.CallOption) *LocationIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListLocations[0:len((*c.CallOptions).ListLocations):len((*c.CallOptions).ListLocations)], opts...)
	it := &LocationIterator{}
	req = proto.Clone(req).(*locationpb.ListLocationsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*locationpb.Location, string, error) {
		resp := &locationpb.ListLocationsResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.locationsClient.ListLocations(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

		it.Response = resp
		return resp.GetLocations(), 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 *entityTypesGRPCClient) CancelOperation(ctx context.Context, req *longrunningpb.CancelOperationRequest, opts ...gax.CallOption) error {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).CancelOperation[0:len((*c.CallOptions).CancelOperation):len((*c.CallOptions).CancelOperation)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		_, err = c.operationsClient.CancelOperation(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	return err
}

func (c *entityTypesGRPCClient) GetOperation(ctx context.Context, req *longrunningpb.GetOperationRequest, opts ...gax.CallOption) (*longrunningpb.Operation, error) {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

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

func (c *entityTypesGRPCClient) ListOperations(ctx context.Context, req *longrunningpb.ListOperationsRequest, opts ...gax.CallOption) *OperationIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListOperations[0:len((*c.CallOptions).ListOperations):len((*c.CallOptions).ListOperations)], opts...)
	it := &OperationIterator{}
	req = proto.Clone(req).(*longrunningpb.ListOperationsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*longrunningpb.Operation, string, error) {
		resp := &longrunningpb.ListOperationsResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
			var err error
			resp, err = c.operationsClient.ListOperations(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

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

// ListEntityTypes returns the list of all entity types in the specified agent.
func (c *entityTypesRESTClient) ListEntityTypes(ctx context.Context, req *dialogflowpb.ListEntityTypesRequest, opts ...gax.CallOption) *EntityTypeIterator {
	it := &EntityTypeIterator{}
	req = proto.Clone(req).(*dialogflowpb.ListEntityTypesRequest)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	it.InternalFetch = func(pageSize int, pageToken string) ([]*dialogflowpb.EntityType, string, error) {
		resp := &dialogflowpb.ListEntityTypesResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		baseUrl, err := url.Parse(c.endpoint)
		if err != nil {
			return nil, "", err
		}
		baseUrl.Path += fmt.Sprintf("/v2/%v/entityTypes", req.GetParent())

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

		baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

// GetEntityType retrieves the specified entity type.
func (c *entityTypesRESTClient) GetEntityType(ctx context.Context, req *dialogflowpb.GetEntityTypeRequest, opts ...gax.CallOption) (*dialogflowpb.EntityType, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%v", req.GetName())

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")
	if req.GetLanguageCode() != "" {
		params.Add("languageCode", fmt.Sprintf("%v", req.GetLanguageCode()))
	}

	baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

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

// CreateEntityType creates an entity type in the specified agent.
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *entityTypesRESTClient) CreateEntityType(ctx context.Context, req *dialogflowpb.CreateEntityTypeRequest, opts ...gax.CallOption) (*dialogflowpb.EntityType, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetEntityType()
	jsonReq, err := m.Marshal(body)
	if err != nil {
		return nil, err
	}

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

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")
	if req.GetLanguageCode() != "" {
		params.Add("languageCode", fmt.Sprintf("%v", req.GetLanguageCode()))
	}

	baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

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

// UpdateEntityType updates the specified entity type.
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *entityTypesRESTClient) UpdateEntityType(ctx context.Context, req *dialogflowpb.UpdateEntityTypeRequest, opts ...gax.CallOption) (*dialogflowpb.EntityType, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetEntityType()
	jsonReq, err := m.Marshal(body)
	if err != nil {
		return nil, err
	}

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

	params := url.Values{}
	params.Add("$alt", "json;enum-encoding=int")
	if req.GetLanguageCode() != "" {
		params.Add("languageCode", fmt.Sprintf("%v", req.GetLanguageCode()))
	}
	if req.GetUpdateMask() != nil {
		updateMask, err := protojson.Marshal(req.GetUpdateMask())
		if err != nil {
			return nil, err
		}
		params.Add("updateMask", string(updateMask))
	}

	baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

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

// DeleteEntityType deletes the specified entity type.
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *entityTypesRESTClient) DeleteEntityType(ctx context.Context, req *dialogflowpb.DeleteEntityTypeRequest, opts ...gax.CallOption) error {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%v", req.GetName())

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

	baseUrl.RawQuery = params.Encode()

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

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

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

		// Returns nil if there is no error, otherwise wraps
		// the response code and body into a non-nil error
		return googleapi.CheckResponse(httpRsp)
	}, opts...)
}

// BatchUpdateEntityTypes updates/Creates multiple entity types in the specified agent.
//
// This method is a long-running
// operation (at https://cloud.google.com/dialogflow/es/docs/how/long-running-operations).
// The returned Operation type has the following method-specific fields:
//
//	metadata: An empty Struct
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct)
//
//	response:
//	BatchUpdateEntityTypesResponse
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *entityTypesRESTClient) BatchUpdateEntityTypes(ctx context.Context, req *dialogflowpb.BatchUpdateEntityTypesRequest, opts ...gax.CallOption) (*BatchUpdateEntityTypesOperation, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

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

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

	baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

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

	override := fmt.Sprintf("/v2/%s", resp.GetName())
	return &BatchUpdateEntityTypesOperation{
		lro:      longrunning.InternalNewOperation(*c.LROClient, resp),
		pollPath: override,
	}, nil
}

// BatchDeleteEntityTypes deletes entity types in the specified agent.
//
// This method is a long-running
// operation (at https://cloud.google.com/dialogflow/es/docs/how/long-running-operations).
// The returned Operation type has the following method-specific fields:
//
//	metadata: An empty Struct
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct)
//
//	response: An Empty
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#empty)
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *entityTypesRESTClient) BatchDeleteEntityTypes(ctx context.Context, req *dialogflowpb.BatchDeleteEntityTypesRequest, opts ...gax.CallOption) (*BatchDeleteEntityTypesOperation, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

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

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

	baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

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

	override := fmt.Sprintf("/v2/%s", resp.GetName())
	return &BatchDeleteEntityTypesOperation{
		lro:      longrunning.InternalNewOperation(*c.LROClient, resp),
		pollPath: override,
	}, nil
}

// BatchCreateEntities creates multiple new entities in the specified entity type.
//
// This method is a long-running
// operation (at https://cloud.google.com/dialogflow/es/docs/how/long-running-operations).
// The returned Operation type has the following method-specific fields:
//
//	metadata: An empty Struct
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct)
//
//	response: An Empty
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#empty)
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *entityTypesRESTClient) BatchCreateEntities(ctx context.Context, req *dialogflowpb.BatchCreateEntitiesRequest, opts ...gax.CallOption) (*BatchCreateEntitiesOperation, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

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

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

	baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

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

	override := fmt.Sprintf("/v2/%s", resp.GetName())
	return &BatchCreateEntitiesOperation{
		lro:      longrunning.InternalNewOperation(*c.LROClient, resp),
		pollPath: override,
	}, nil
}

// BatchUpdateEntities updates or creates multiple entities in the specified entity type. This
// method does not affect entities in the entity type that aren’t explicitly
// specified in the request.
//
// This method is a long-running
// operation (at https://cloud.google.com/dialogflow/es/docs/how/long-running-operations).
// The returned Operation type has the following method-specific fields:
//
//	metadata: An empty Struct
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct)
//
//	response: An Empty
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#empty)
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *entityTypesRESTClient) BatchUpdateEntities(ctx context.Context, req *dialogflowpb.BatchUpdateEntitiesRequest, opts ...gax.CallOption) (*BatchUpdateEntitiesOperation, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

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

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

	baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

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

	override := fmt.Sprintf("/v2/%s", resp.GetName())
	return &BatchUpdateEntitiesOperation{
		lro:      longrunning.InternalNewOperation(*c.LROClient, resp),
		pollPath: override,
	}, nil
}

// BatchDeleteEntities deletes entities in the specified entity type.
//
// This method is a long-running
// operation (at https://cloud.google.com/dialogflow/es/docs/how/long-running-operations).
// The returned Operation type has the following method-specific fields:
//
//	metadata: An empty Struct
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#struct)
//
//	response: An Empty
//	message (at https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#empty)
//
// Note: You should always train an agent prior to sending it queries. See the
// training
// documentation (at https://cloud.google.com/dialogflow/es/docs/training).
func (c *entityTypesRESTClient) BatchDeleteEntities(ctx context.Context, req *dialogflowpb.BatchDeleteEntitiesRequest, opts ...gax.CallOption) (*BatchDeleteEntitiesOperation, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

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

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

	baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

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

	override := fmt.Sprintf("/v2/%s", resp.GetName())
	return &BatchDeleteEntitiesOperation{
		lro:      longrunning.InternalNewOperation(*c.LROClient, resp),
		pollPath: override,
	}, nil
}

// GetLocation gets information about a location.
func (c *entityTypesRESTClient) GetLocation(ctx context.Context, req *locationpb.GetLocationRequest, opts ...gax.CallOption) (*locationpb.Location, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%v", req.GetName())

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

	baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

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

// ListLocations lists information about the supported locations for this service.
func (c *entityTypesRESTClient) ListLocations(ctx context.Context, req *locationpb.ListLocationsRequest, opts ...gax.CallOption) *LocationIterator {
	it := &LocationIterator{}
	req = proto.Clone(req).(*locationpb.ListLocationsRequest)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	it.InternalFetch = func(pageSize int, pageToken string) ([]*locationpb.Location, string, error) {
		resp := &locationpb.ListLocationsResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		baseUrl, err := url.Parse(c.endpoint)
		if err != nil {
			return nil, "", err
		}
		baseUrl.Path += fmt.Sprintf("/v2/%v/locations", req.GetName())

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

		baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

// CancelOperation is a utility method from google.longrunning.Operations.
func (c *entityTypesRESTClient) CancelOperation(ctx context.Context, req *longrunningpb.CancelOperationRequest, opts ...gax.CallOption) error {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%v:cancel", req.GetName())

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

	baseUrl.RawQuery = params.Encode()

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

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

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

		// Returns nil if there is no error, otherwise wraps
		// the response code and body into a non-nil error
		return googleapi.CheckResponse(httpRsp)
	}, opts...)
}

// GetOperation is a utility method from google.longrunning.Operations.
func (c *entityTypesRESTClient) GetOperation(ctx context.Context, req *longrunningpb.GetOperationRequest, opts ...gax.CallOption) (*longrunningpb.Operation, error) {
	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v2/%v", req.GetName())

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

	baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

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

// ListOperations lists operations that match the specified filter in the request. If
// the server doesn’t support this method, it returns UNIMPLEMENTED.
func (c *entityTypesRESTClient) ListOperations(ctx context.Context, req *longrunningpb.ListOperationsRequest, opts ...gax.CallOption) *OperationIterator {
	it := &OperationIterator{}
	req = proto.Clone(req).(*longrunningpb.ListOperationsRequest)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	it.InternalFetch = func(pageSize int, pageToken string) ([]*longrunningpb.Operation, string, error) {
		resp := &longrunningpb.ListOperationsResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		baseUrl, err := url.Parse(c.endpoint)
		if err != nil {
			return nil, "", err
		}
		baseUrl.Path += fmt.Sprintf("/v2/%v/operations", req.GetName())

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

		baseUrl.RawQuery = params.Encode()

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

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

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

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

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

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

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

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

// BatchCreateEntitiesOperation returns a new BatchCreateEntitiesOperation from a given name.
// The name must be that of a previously created BatchCreateEntitiesOperation, possibly from a different process.
func (c *entityTypesRESTClient) BatchCreateEntitiesOperation(name string) *BatchCreateEntitiesOperation {
	override := fmt.Sprintf("/v2/%s", name)
	return &BatchCreateEntitiesOperation{
		lro:      longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
		pollPath: override,
	}
}

// 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 *BatchCreateEntitiesOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	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 *BatchCreateEntitiesOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	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 *BatchCreateEntitiesOperation) Metadata() (*structpb.Struct, error) {
	var meta structpb.Struct
	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 *BatchCreateEntitiesOperation) 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 *BatchCreateEntitiesOperation) Name() string {
	return op.lro.Name()
}

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

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

// BatchDeleteEntitiesOperation returns a new BatchDeleteEntitiesOperation from a given name.
// The name must be that of a previously created BatchDeleteEntitiesOperation, possibly from a different process.
func (c *entityTypesRESTClient) BatchDeleteEntitiesOperation(name string) *BatchDeleteEntitiesOperation {
	override := fmt.Sprintf("/v2/%s", name)
	return &BatchDeleteEntitiesOperation{
		lro:      longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
		pollPath: override,
	}
}

// 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 *BatchDeleteEntitiesOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	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 *BatchDeleteEntitiesOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	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 *BatchDeleteEntitiesOperation) Metadata() (*structpb.Struct, error) {
	var meta structpb.Struct
	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 *BatchDeleteEntitiesOperation) 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 *BatchDeleteEntitiesOperation) Name() string {
	return op.lro.Name()
}

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

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

// BatchDeleteEntityTypesOperation returns a new BatchDeleteEntityTypesOperation from a given name.
// The name must be that of a previously created BatchDeleteEntityTypesOperation, possibly from a different process.
func (c *entityTypesRESTClient) BatchDeleteEntityTypesOperation(name string) *BatchDeleteEntityTypesOperation {
	override := fmt.Sprintf("/v2/%s", name)
	return &BatchDeleteEntityTypesOperation{
		lro:      longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
		pollPath: override,
	}
}

// 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 *BatchDeleteEntityTypesOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	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 *BatchDeleteEntityTypesOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	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 *BatchDeleteEntityTypesOperation) Metadata() (*structpb.Struct, error) {
	var meta structpb.Struct
	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 *BatchDeleteEntityTypesOperation) 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 *BatchDeleteEntityTypesOperation) Name() string {
	return op.lro.Name()
}

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

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

// BatchUpdateEntitiesOperation returns a new BatchUpdateEntitiesOperation from a given name.
// The name must be that of a previously created BatchUpdateEntitiesOperation, possibly from a different process.
func (c *entityTypesRESTClient) BatchUpdateEntitiesOperation(name string) *BatchUpdateEntitiesOperation {
	override := fmt.Sprintf("/v2/%s", name)
	return &BatchUpdateEntitiesOperation{
		lro:      longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
		pollPath: override,
	}
}

// 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 *BatchUpdateEntitiesOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	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 *BatchUpdateEntitiesOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	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 *BatchUpdateEntitiesOperation) Metadata() (*structpb.Struct, error) {
	var meta structpb.Struct
	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 *BatchUpdateEntitiesOperation) 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 *BatchUpdateEntitiesOperation) Name() string {
	return op.lro.Name()
}

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

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

// BatchUpdateEntityTypesOperation returns a new BatchUpdateEntityTypesOperation from a given name.
// The name must be that of a previously created BatchUpdateEntityTypesOperation, possibly from a different process.
func (c *entityTypesRESTClient) BatchUpdateEntityTypesOperation(name string) *BatchUpdateEntityTypesOperation {
	override := fmt.Sprintf("/v2/%s", name)
	return &BatchUpdateEntityTypesOperation{
		lro:      longrunning.InternalNewOperation(*c.LROClient, &longrunningpb.Operation{Name: name}),
		pollPath: override,
	}
}

// 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 *BatchUpdateEntityTypesOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*dialogflowpb.BatchUpdateEntityTypesResponse, error) {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	var resp dialogflowpb.BatchUpdateEntityTypesResponse
	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 *BatchUpdateEntityTypesOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*dialogflowpb.BatchUpdateEntityTypesResponse, error) {
	opts = append([]gax.CallOption{gax.WithPath(op.pollPath)}, opts...)
	var resp dialogflowpb.BatchUpdateEntityTypesResponse
	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 *BatchUpdateEntityTypesOperation) Metadata() (*structpb.Struct, error) {
	var meta structpb.Struct
	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 *BatchUpdateEntityTypesOperation) 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 *BatchUpdateEntityTypesOperation) Name() string {
	return op.lro.Name()
}

// EntityTypeIterator manages a stream of *dialogflowpb.EntityType.
type EntityTypeIterator struct {
	items    []*dialogflowpb.EntityType
	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 []*dialogflowpb.EntityType, nextPageToken string, err error)
}

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

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

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