datastream_client.go

// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     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 datastream

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

	"cloud.google.com/go/longrunning"
	lroauto "cloud.google.com/go/longrunning/autogen"
	gax "github.com/googleapis/gax-go/v2"
	"google.golang.org/api/iterator"
	"google.golang.org/api/option"
	"google.golang.org/api/option/internaloption"
	gtransport "google.golang.org/api/transport/grpc"
	datastreampb "google.golang.org/genproto/googleapis/cloud/datastream/v1"
	locationpb "google.golang.org/genproto/googleapis/cloud/location"
	longrunningpb "google.golang.org/genproto/googleapis/longrunning"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/proto"
)

var newClientHook clientHook

// CallOptions contains the retry settings for each method of Client.
type CallOptions struct {
	ListConnectionProfiles    []gax.CallOption
	GetConnectionProfile      []gax.CallOption
	CreateConnectionProfile   []gax.CallOption
	UpdateConnectionProfile   []gax.CallOption
	DeleteConnectionProfile   []gax.CallOption
	DiscoverConnectionProfile []gax.CallOption
	ListStreams               []gax.CallOption
	GetStream                 []gax.CallOption
	CreateStream              []gax.CallOption
	UpdateStream              []gax.CallOption
	DeleteStream              []gax.CallOption
	GetStreamObject           []gax.CallOption
	LookupStreamObject        []gax.CallOption
	ListStreamObjects         []gax.CallOption
	StartBackfillJob          []gax.CallOption
	StopBackfillJob           []gax.CallOption
	FetchStaticIps            []gax.CallOption
	CreatePrivateConnection   []gax.CallOption
	GetPrivateConnection      []gax.CallOption
	ListPrivateConnections    []gax.CallOption
	DeletePrivateConnection   []gax.CallOption
	CreateRoute               []gax.CallOption
	GetRoute                  []gax.CallOption
	ListRoutes                []gax.CallOption
	DeleteRoute               []gax.CallOption
	GetLocation               []gax.CallOption
	ListLocations             []gax.CallOption
}

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

func defaultCallOptions() *CallOptions {
	return &CallOptions{
		ListConnectionProfiles: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetConnectionProfile: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		CreateConnectionProfile: []gax.CallOption{},
		UpdateConnectionProfile: []gax.CallOption{},
		DeleteConnectionProfile: []gax.CallOption{},
		DiscoverConnectionProfile: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ListStreams: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		GetStream: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		CreateStream: []gax.CallOption{},
		UpdateStream: []gax.CallOption{},
		DeleteStream: []gax.CallOption{},
		GetStreamObject: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		LookupStreamObject: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ListStreamObjects: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		StartBackfillJob: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		StopBackfillJob: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		FetchStaticIps: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		CreatePrivateConnection: []gax.CallOption{},
		GetPrivateConnection: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ListPrivateConnections: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		DeletePrivateConnection: []gax.CallOption{},
		CreateRoute:             []gax.CallOption{},
		GetRoute: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		ListRoutes: []gax.CallOption{
			gax.WithRetry(func() gax.Retryer {
				return gax.OnCodes([]codes.Code{
					codes.Unavailable,
				}, gax.Backoff{
					Initial:    1000 * time.Millisecond,
					Max:        10000 * time.Millisecond,
					Multiplier: 1.30,
				})
			}),
		},
		DeleteRoute:   []gax.CallOption{},
		GetLocation:   []gax.CallOption{},
		ListLocations: []gax.CallOption{},
	}
}

// internalClient is an interface that defines the methods availaible from Datastream API.
type internalClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	ListConnectionProfiles(context.Context, *datastreampb.ListConnectionProfilesRequest, ...gax.CallOption) *ConnectionProfileIterator
	GetConnectionProfile(context.Context, *datastreampb.GetConnectionProfileRequest, ...gax.CallOption) (*datastreampb.ConnectionProfile, error)
	CreateConnectionProfile(context.Context, *datastreampb.CreateConnectionProfileRequest, ...gax.CallOption) (*CreateConnectionProfileOperation, error)
	CreateConnectionProfileOperation(name string) *CreateConnectionProfileOperation
	UpdateConnectionProfile(context.Context, *datastreampb.UpdateConnectionProfileRequest, ...gax.CallOption) (*UpdateConnectionProfileOperation, error)
	UpdateConnectionProfileOperation(name string) *UpdateConnectionProfileOperation
	DeleteConnectionProfile(context.Context, *datastreampb.DeleteConnectionProfileRequest, ...gax.CallOption) (*DeleteConnectionProfileOperation, error)
	DeleteConnectionProfileOperation(name string) *DeleteConnectionProfileOperation
	DiscoverConnectionProfile(context.Context, *datastreampb.DiscoverConnectionProfileRequest, ...gax.CallOption) (*datastreampb.DiscoverConnectionProfileResponse, error)
	ListStreams(context.Context, *datastreampb.ListStreamsRequest, ...gax.CallOption) *StreamIterator
	GetStream(context.Context, *datastreampb.GetStreamRequest, ...gax.CallOption) (*datastreampb.Stream, error)
	CreateStream(context.Context, *datastreampb.CreateStreamRequest, ...gax.CallOption) (*CreateStreamOperation, error)
	CreateStreamOperation(name string) *CreateStreamOperation
	UpdateStream(context.Context, *datastreampb.UpdateStreamRequest, ...gax.CallOption) (*UpdateStreamOperation, error)
	UpdateStreamOperation(name string) *UpdateStreamOperation
	DeleteStream(context.Context, *datastreampb.DeleteStreamRequest, ...gax.CallOption) (*DeleteStreamOperation, error)
	DeleteStreamOperation(name string) *DeleteStreamOperation
	GetStreamObject(context.Context, *datastreampb.GetStreamObjectRequest, ...gax.CallOption) (*datastreampb.StreamObject, error)
	LookupStreamObject(context.Context, *datastreampb.LookupStreamObjectRequest, ...gax.CallOption) (*datastreampb.StreamObject, error)
	ListStreamObjects(context.Context, *datastreampb.ListStreamObjectsRequest, ...gax.CallOption) *StreamObjectIterator
	StartBackfillJob(context.Context, *datastreampb.StartBackfillJobRequest, ...gax.CallOption) (*datastreampb.StartBackfillJobResponse, error)
	StopBackfillJob(context.Context, *datastreampb.StopBackfillJobRequest, ...gax.CallOption) (*datastreampb.StopBackfillJobResponse, error)
	FetchStaticIps(context.Context, *datastreampb.FetchStaticIpsRequest, ...gax.CallOption) *StringIterator
	CreatePrivateConnection(context.Context, *datastreampb.CreatePrivateConnectionRequest, ...gax.CallOption) (*CreatePrivateConnectionOperation, error)
	CreatePrivateConnectionOperation(name string) *CreatePrivateConnectionOperation
	GetPrivateConnection(context.Context, *datastreampb.GetPrivateConnectionRequest, ...gax.CallOption) (*datastreampb.PrivateConnection, error)
	ListPrivateConnections(context.Context, *datastreampb.ListPrivateConnectionsRequest, ...gax.CallOption) *PrivateConnectionIterator
	DeletePrivateConnection(context.Context, *datastreampb.DeletePrivateConnectionRequest, ...gax.CallOption) (*DeletePrivateConnectionOperation, error)
	DeletePrivateConnectionOperation(name string) *DeletePrivateConnectionOperation
	CreateRoute(context.Context, *datastreampb.CreateRouteRequest, ...gax.CallOption) (*CreateRouteOperation, error)
	CreateRouteOperation(name string) *CreateRouteOperation
	GetRoute(context.Context, *datastreampb.GetRouteRequest, ...gax.CallOption) (*datastreampb.Route, error)
	ListRoutes(context.Context, *datastreampb.ListRoutesRequest, ...gax.CallOption) *RouteIterator
	DeleteRoute(context.Context, *datastreampb.DeleteRouteRequest, ...gax.CallOption) (*DeleteRouteOperation, error)
	DeleteRouteOperation(name string) *DeleteRouteOperation
	GetLocation(context.Context, *locationpb.GetLocationRequest, ...gax.CallOption) (*locationpb.Location, error)
	ListLocations(context.Context, *locationpb.ListLocationsRequest, ...gax.CallOption) *LocationIterator
}

// Client is a client for interacting with Datastream API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// Datastream service
type Client struct {
	// The internal transport-dependent client.
	internalClient internalClient

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

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

// Wrapper methods routed to the internal client.

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

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

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

// ListConnectionProfiles use this method to list connection profiles created in a project and
// location.
func (c *Client) ListConnectionProfiles(ctx context.Context, req *datastreampb.ListConnectionProfilesRequest, opts ...gax.CallOption) *ConnectionProfileIterator {
	return c.internalClient.ListConnectionProfiles(ctx, req, opts...)
}

// GetConnectionProfile use this method to get details about a connection profile.
func (c *Client) GetConnectionProfile(ctx context.Context, req *datastreampb.GetConnectionProfileRequest, opts ...gax.CallOption) (*datastreampb.ConnectionProfile, error) {
	return c.internalClient.GetConnectionProfile(ctx, req, opts...)
}

// CreateConnectionProfile use this method to create a connection profile in a project and location.
func (c *Client) CreateConnectionProfile(ctx context.Context, req *datastreampb.CreateConnectionProfileRequest, opts ...gax.CallOption) (*CreateConnectionProfileOperation, error) {
	return c.internalClient.CreateConnectionProfile(ctx, req, opts...)
}

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

// UpdateConnectionProfile use this method to update the parameters of a connection profile.
func (c *Client) UpdateConnectionProfile(ctx context.Context, req *datastreampb.UpdateConnectionProfileRequest, opts ...gax.CallOption) (*UpdateConnectionProfileOperation, error) {
	return c.internalClient.UpdateConnectionProfile(ctx, req, opts...)
}

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

// DeleteConnectionProfile use this method to delete a connection profile.
func (c *Client) DeleteConnectionProfile(ctx context.Context, req *datastreampb.DeleteConnectionProfileRequest, opts ...gax.CallOption) (*DeleteConnectionProfileOperation, error) {
	return c.internalClient.DeleteConnectionProfile(ctx, req, opts...)
}

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

// DiscoverConnectionProfile use this method to discover a connection profile.
// The discover API call exposes the data objects and metadata belonging to
// the profile. Typically, a request returns children data objects of a
// parent data object that’s optionally supplied in the request.
func (c *Client) DiscoverConnectionProfile(ctx context.Context, req *datastreampb.DiscoverConnectionProfileRequest, opts ...gax.CallOption) (*datastreampb.DiscoverConnectionProfileResponse, error) {
	return c.internalClient.DiscoverConnectionProfile(ctx, req, opts...)
}

// ListStreams use this method to list streams in a project and location.
func (c *Client) ListStreams(ctx context.Context, req *datastreampb.ListStreamsRequest, opts ...gax.CallOption) *StreamIterator {
	return c.internalClient.ListStreams(ctx, req, opts...)
}

// GetStream use this method to get details about a stream.
func (c *Client) GetStream(ctx context.Context, req *datastreampb.GetStreamRequest, opts ...gax.CallOption) (*datastreampb.Stream, error) {
	return c.internalClient.GetStream(ctx, req, opts...)
}

// CreateStream use this method to create a stream.
func (c *Client) CreateStream(ctx context.Context, req *datastreampb.CreateStreamRequest, opts ...gax.CallOption) (*CreateStreamOperation, error) {
	return c.internalClient.CreateStream(ctx, req, opts...)
}

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

// UpdateStream use this method to update the configuration of a stream.
func (c *Client) UpdateStream(ctx context.Context, req *datastreampb.UpdateStreamRequest, opts ...gax.CallOption) (*UpdateStreamOperation, error) {
	return c.internalClient.UpdateStream(ctx, req, opts...)
}

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

// DeleteStream use this method to delete a stream.
func (c *Client) DeleteStream(ctx context.Context, req *datastreampb.DeleteStreamRequest, opts ...gax.CallOption) (*DeleteStreamOperation, error) {
	return c.internalClient.DeleteStream(ctx, req, opts...)
}

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

// GetStreamObject use this method to get details about a stream object.
func (c *Client) GetStreamObject(ctx context.Context, req *datastreampb.GetStreamObjectRequest, opts ...gax.CallOption) (*datastreampb.StreamObject, error) {
	return c.internalClient.GetStreamObject(ctx, req, opts...)
}

// LookupStreamObject use this method to look up a stream object by its source object identifier.
func (c *Client) LookupStreamObject(ctx context.Context, req *datastreampb.LookupStreamObjectRequest, opts ...gax.CallOption) (*datastreampb.StreamObject, error) {
	return c.internalClient.LookupStreamObject(ctx, req, opts...)
}

// ListStreamObjects use this method to list the objects of a specific stream.
func (c *Client) ListStreamObjects(ctx context.Context, req *datastreampb.ListStreamObjectsRequest, opts ...gax.CallOption) *StreamObjectIterator {
	return c.internalClient.ListStreamObjects(ctx, req, opts...)
}

// StartBackfillJob use this method to start a backfill job for the specified stream object.
func (c *Client) StartBackfillJob(ctx context.Context, req *datastreampb.StartBackfillJobRequest, opts ...gax.CallOption) (*datastreampb.StartBackfillJobResponse, error) {
	return c.internalClient.StartBackfillJob(ctx, req, opts...)
}

// StopBackfillJob use this method to stop a backfill job for the specified stream object.
func (c *Client) StopBackfillJob(ctx context.Context, req *datastreampb.StopBackfillJobRequest, opts ...gax.CallOption) (*datastreampb.StopBackfillJobResponse, error) {
	return c.internalClient.StopBackfillJob(ctx, req, opts...)
}

// FetchStaticIps the FetchStaticIps API call exposes the static IP addresses used by
// Datastream.
func (c *Client) FetchStaticIps(ctx context.Context, req *datastreampb.FetchStaticIpsRequest, opts ...gax.CallOption) *StringIterator {
	return c.internalClient.FetchStaticIps(ctx, req, opts...)
}

// CreatePrivateConnection use this method to create a private connectivity configuration.
func (c *Client) CreatePrivateConnection(ctx context.Context, req *datastreampb.CreatePrivateConnectionRequest, opts ...gax.CallOption) (*CreatePrivateConnectionOperation, error) {
	return c.internalClient.CreatePrivateConnection(ctx, req, opts...)
}

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

// GetPrivateConnection use this method to get details about a private connectivity configuration.
func (c *Client) GetPrivateConnection(ctx context.Context, req *datastreampb.GetPrivateConnectionRequest, opts ...gax.CallOption) (*datastreampb.PrivateConnection, error) {
	return c.internalClient.GetPrivateConnection(ctx, req, opts...)
}

// ListPrivateConnections use this method to list private connectivity configurations in a project
// and location.
func (c *Client) ListPrivateConnections(ctx context.Context, req *datastreampb.ListPrivateConnectionsRequest, opts ...gax.CallOption) *PrivateConnectionIterator {
	return c.internalClient.ListPrivateConnections(ctx, req, opts...)
}

// DeletePrivateConnection use this method to delete a private connectivity configuration.
func (c *Client) DeletePrivateConnection(ctx context.Context, req *datastreampb.DeletePrivateConnectionRequest, opts ...gax.CallOption) (*DeletePrivateConnectionOperation, error) {
	return c.internalClient.DeletePrivateConnection(ctx, req, opts...)
}

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

// CreateRoute use this method to create a route for a private connectivity configuration
// in a project and location.
func (c *Client) CreateRoute(ctx context.Context, req *datastreampb.CreateRouteRequest, opts ...gax.CallOption) (*CreateRouteOperation, error) {
	return c.internalClient.CreateRoute(ctx, req, opts...)
}

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

// GetRoute use this method to get details about a route.
func (c *Client) GetRoute(ctx context.Context, req *datastreampb.GetRouteRequest, opts ...gax.CallOption) (*datastreampb.Route, error) {
	return c.internalClient.GetRoute(ctx, req, opts...)
}

// ListRoutes use this method to list routes created for a private connectivity
// configuration in a project and location.
func (c *Client) ListRoutes(ctx context.Context, req *datastreampb.ListRoutesRequest, opts ...gax.CallOption) *RouteIterator {
	return c.internalClient.ListRoutes(ctx, req, opts...)
}

// DeleteRoute use this method to delete a route.
func (c *Client) DeleteRoute(ctx context.Context, req *datastreampb.DeleteRouteRequest, opts ...gax.CallOption) (*DeleteRouteOperation, error) {
	return c.internalClient.DeleteRoute(ctx, req, opts...)
}

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

// GetLocation gets information about a location.
func (c *Client) 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 *Client) ListLocations(ctx context.Context, req *locationpb.ListLocationsRequest, opts ...gax.CallOption) *LocationIterator {
	return c.internalClient.ListLocations(ctx, req, opts...)
}

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

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

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

	// The gRPC API client.
	client datastreampb.DatastreamClient

	// 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

	locationsClient locationpb.LocationsClient

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

// NewClient creates a new datastream client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// Datastream service
func NewClient(ctx context.Context, opts ...option.ClientOption) (*Client, error) {
	clientOpts := defaultGRPCClientOptions()
	if newClientHook != nil {
		hookOpts, err := newClientHook(ctx, clientHookParams{})
		if err != nil {
			return nil, err
		}
		clientOpts = append(clientOpts, hookOpts...)
	}

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

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

	c := &gRPCClient{
		connPool:         connPool,
		disableDeadlines: disableDeadlines,
		client:           datastreampb.NewDatastreamClient(connPool),
		CallOptions:      &client.CallOptions,
		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.
func (c *gRPCClient) Connection() *grpc.ClientConn {
	return c.connPool.Conn()
}

// setGoogleClientInfo sets the name and version of the application in
// the `x-goog-api-client` header passed on each request. Intended for
// use by Google-written clients.
func (c *gRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", versionGo()}, keyval...)
	kv = append(kv, "gapic", 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 *gRPCClient) Close() error {
	return c.connPool.Close()
}

func (c *gRPCClient) ListConnectionProfiles(ctx context.Context, req *datastreampb.ListConnectionProfilesRequest, opts ...gax.CallOption) *ConnectionProfileIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListConnectionProfiles[0:len((*c.CallOptions).ListConnectionProfiles):len((*c.CallOptions).ListConnectionProfiles)], opts...)
	it := &ConnectionProfileIterator{}
	req = proto.Clone(req).(*datastreampb.ListConnectionProfilesRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*datastreampb.ConnectionProfile, string, error) {
		resp := &datastreampb.ListConnectionProfilesResponse{}
		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.client.ListConnectionProfiles(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

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

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

	return it
}

func (c *gRPCClient) GetConnectionProfile(ctx context.Context, req *datastreampb.GetConnectionProfileRequest, opts ...gax.CallOption) (*datastreampb.ConnectionProfile, 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).GetConnectionProfile[0:len((*c.CallOptions).GetConnectionProfile):len((*c.CallOptions).GetConnectionProfile)], opts...)
	var resp *datastreampb.ConnectionProfile
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetConnectionProfile(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) CreateConnectionProfile(ctx context.Context, req *datastreampb.CreateConnectionProfileRequest, opts ...gax.CallOption) (*CreateConnectionProfileOperation, 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).CreateConnectionProfile[0:len((*c.CallOptions).CreateConnectionProfile):len((*c.CallOptions).CreateConnectionProfile)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.CreateConnectionProfile(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreateConnectionProfileOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) UpdateConnectionProfile(ctx context.Context, req *datastreampb.UpdateConnectionProfileRequest, opts ...gax.CallOption) (*UpdateConnectionProfileOperation, 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", "connection_profile.name", url.QueryEscape(req.GetConnectionProfile().GetName())))

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

func (c *gRPCClient) DeleteConnectionProfile(ctx context.Context, req *datastreampb.DeleteConnectionProfileRequest, opts ...gax.CallOption) (*DeleteConnectionProfileOperation, 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).DeleteConnectionProfile[0:len((*c.CallOptions).DeleteConnectionProfile):len((*c.CallOptions).DeleteConnectionProfile)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.DeleteConnectionProfile(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeleteConnectionProfileOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) DiscoverConnectionProfile(ctx context.Context, req *datastreampb.DiscoverConnectionProfileRequest, opts ...gax.CallOption) (*datastreampb.DiscoverConnectionProfileResponse, 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).DiscoverConnectionProfile[0:len((*c.CallOptions).DiscoverConnectionProfile):len((*c.CallOptions).DiscoverConnectionProfile)], opts...)
	var resp *datastreampb.DiscoverConnectionProfileResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.DiscoverConnectionProfile(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) ListStreams(ctx context.Context, req *datastreampb.ListStreamsRequest, opts ...gax.CallOption) *StreamIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListStreams[0:len((*c.CallOptions).ListStreams):len((*c.CallOptions).ListStreams)], opts...)
	it := &StreamIterator{}
	req = proto.Clone(req).(*datastreampb.ListStreamsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*datastreampb.Stream, string, error) {
		resp := &datastreampb.ListStreamsResponse{}
		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.client.ListStreams(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

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

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

	return it
}

func (c *gRPCClient) GetStream(ctx context.Context, req *datastreampb.GetStreamRequest, opts ...gax.CallOption) (*datastreampb.Stream, 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).GetStream[0:len((*c.CallOptions).GetStream):len((*c.CallOptions).GetStream)], opts...)
	var resp *datastreampb.Stream
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetStream(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) CreateStream(ctx context.Context, req *datastreampb.CreateStreamRequest, opts ...gax.CallOption) (*CreateStreamOperation, 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).CreateStream[0:len((*c.CallOptions).CreateStream):len((*c.CallOptions).CreateStream)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.CreateStream(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreateStreamOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) UpdateStream(ctx context.Context, req *datastreampb.UpdateStreamRequest, opts ...gax.CallOption) (*UpdateStreamOperation, 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", "stream.name", url.QueryEscape(req.GetStream().GetName())))

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

func (c *gRPCClient) DeleteStream(ctx context.Context, req *datastreampb.DeleteStreamRequest, opts ...gax.CallOption) (*DeleteStreamOperation, 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).DeleteStream[0:len((*c.CallOptions).DeleteStream):len((*c.CallOptions).DeleteStream)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.DeleteStream(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeleteStreamOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) GetStreamObject(ctx context.Context, req *datastreampb.GetStreamObjectRequest, opts ...gax.CallOption) (*datastreampb.StreamObject, 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).GetStreamObject[0:len((*c.CallOptions).GetStreamObject):len((*c.CallOptions).GetStreamObject)], opts...)
	var resp *datastreampb.StreamObject
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetStreamObject(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) LookupStreamObject(ctx context.Context, req *datastreampb.LookupStreamObjectRequest, opts ...gax.CallOption) (*datastreampb.StreamObject, 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).LookupStreamObject[0:len((*c.CallOptions).LookupStreamObject):len((*c.CallOptions).LookupStreamObject)], opts...)
	var resp *datastreampb.StreamObject
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.LookupStreamObject(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) ListStreamObjects(ctx context.Context, req *datastreampb.ListStreamObjectsRequest, opts ...gax.CallOption) *StreamObjectIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListStreamObjects[0:len((*c.CallOptions).ListStreamObjects):len((*c.CallOptions).ListStreamObjects)], opts...)
	it := &StreamObjectIterator{}
	req = proto.Clone(req).(*datastreampb.ListStreamObjectsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*datastreampb.StreamObject, string, error) {
		resp := &datastreampb.ListStreamObjectsResponse{}
		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.client.ListStreamObjects(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

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

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

	return it
}

func (c *gRPCClient) StartBackfillJob(ctx context.Context, req *datastreampb.StartBackfillJobRequest, opts ...gax.CallOption) (*datastreampb.StartBackfillJobResponse, 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", "object", url.QueryEscape(req.GetObject())))

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

func (c *gRPCClient) StopBackfillJob(ctx context.Context, req *datastreampb.StopBackfillJobRequest, opts ...gax.CallOption) (*datastreampb.StopBackfillJobResponse, 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", "object", url.QueryEscape(req.GetObject())))

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

func (c *gRPCClient) FetchStaticIps(ctx context.Context, req *datastreampb.FetchStaticIpsRequest, opts ...gax.CallOption) *StringIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).FetchStaticIps[0:len((*c.CallOptions).FetchStaticIps):len((*c.CallOptions).FetchStaticIps)], opts...)
	it := &StringIterator{}
	req = proto.Clone(req).(*datastreampb.FetchStaticIpsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]string, string, error) {
		resp := &datastreampb.FetchStaticIpsResponse{}
		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.client.FetchStaticIps(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

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

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

	return it
}

func (c *gRPCClient) CreatePrivateConnection(ctx context.Context, req *datastreampb.CreatePrivateConnectionRequest, opts ...gax.CallOption) (*CreatePrivateConnectionOperation, 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).CreatePrivateConnection[0:len((*c.CallOptions).CreatePrivateConnection):len((*c.CallOptions).CreatePrivateConnection)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.CreatePrivateConnection(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreatePrivateConnectionOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) GetPrivateConnection(ctx context.Context, req *datastreampb.GetPrivateConnectionRequest, opts ...gax.CallOption) (*datastreampb.PrivateConnection, 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).GetPrivateConnection[0:len((*c.CallOptions).GetPrivateConnection):len((*c.CallOptions).GetPrivateConnection)], opts...)
	var resp *datastreampb.PrivateConnection
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetPrivateConnection(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) ListPrivateConnections(ctx context.Context, req *datastreampb.ListPrivateConnectionsRequest, opts ...gax.CallOption) *PrivateConnectionIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListPrivateConnections[0:len((*c.CallOptions).ListPrivateConnections):len((*c.CallOptions).ListPrivateConnections)], opts...)
	it := &PrivateConnectionIterator{}
	req = proto.Clone(req).(*datastreampb.ListPrivateConnectionsRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*datastreampb.PrivateConnection, string, error) {
		resp := &datastreampb.ListPrivateConnectionsResponse{}
		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.client.ListPrivateConnections(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

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

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

	return it
}

func (c *gRPCClient) DeletePrivateConnection(ctx context.Context, req *datastreampb.DeletePrivateConnectionRequest, opts ...gax.CallOption) (*DeletePrivateConnectionOperation, 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).DeletePrivateConnection[0:len((*c.CallOptions).DeletePrivateConnection):len((*c.CallOptions).DeletePrivateConnection)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.DeletePrivateConnection(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeletePrivateConnectionOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) CreateRoute(ctx context.Context, req *datastreampb.CreateRouteRequest, opts ...gax.CallOption) (*CreateRouteOperation, 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).CreateRoute[0:len((*c.CallOptions).CreateRoute):len((*c.CallOptions).CreateRoute)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.CreateRoute(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &CreateRouteOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) GetRoute(ctx context.Context, req *datastreampb.GetRouteRequest, opts ...gax.CallOption) (*datastreampb.Route, 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).GetRoute[0:len((*c.CallOptions).GetRoute):len((*c.CallOptions).GetRoute)], opts...)
	var resp *datastreampb.Route
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.GetRoute(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *gRPCClient) ListRoutes(ctx context.Context, req *datastreampb.ListRoutesRequest, opts ...gax.CallOption) *RouteIterator {
	md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))

	ctx = insertMetadata(ctx, c.xGoogMetadata, md)
	opts = append((*c.CallOptions).ListRoutes[0:len((*c.CallOptions).ListRoutes):len((*c.CallOptions).ListRoutes)], opts...)
	it := &RouteIterator{}
	req = proto.Clone(req).(*datastreampb.ListRoutesRequest)
	it.InternalFetch = func(pageSize int, pageToken string) ([]*datastreampb.Route, string, error) {
		resp := &datastreampb.ListRoutesResponse{}
		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.client.ListRoutes(ctx, req, settings.GRPC...)
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

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

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

	return it
}

func (c *gRPCClient) DeleteRoute(ctx context.Context, req *datastreampb.DeleteRouteRequest, opts ...gax.CallOption) (*DeleteRouteOperation, 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).DeleteRoute[0:len((*c.CallOptions).DeleteRoute):len((*c.CallOptions).DeleteRoute)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = c.client.DeleteRoute(ctx, req, settings.GRPC...)
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return &DeleteRouteOperation{
		lro: longrunning.InternalNewOperation(*c.LROClient, resp),
	}, nil
}

func (c *gRPCClient) GetLocation(ctx context.Context, req *locationpb.GetLocationRequest, opts ...gax.CallOption) (*locationpb.Location, error) {
	ctx = insertMetadata(ctx, c.xGoogMetadata)
	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 *gRPCClient) ListLocations(ctx context.Context, req *locationpb.ListLocationsRequest, opts ...gax.CallOption) *LocationIterator {
	ctx = insertMetadata(ctx, c.xGoogMetadata)
	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
}

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

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *CreateConnectionProfileOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*datastreampb.ConnectionProfile, error) {
	var resp datastreampb.ConnectionProfile
	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 *CreateConnectionProfileOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*datastreampb.ConnectionProfile, error) {
	var resp datastreampb.ConnectionProfile
	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 *CreateConnectionProfileOperation) Metadata() (*datastreampb.OperationMetadata, error) {
	var meta datastreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

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

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

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *CreatePrivateConnectionOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*datastreampb.PrivateConnection, error) {
	var resp datastreampb.PrivateConnection
	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 *CreatePrivateConnectionOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*datastreampb.PrivateConnection, error) {
	var resp datastreampb.PrivateConnection
	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 *CreatePrivateConnectionOperation) Metadata() (*datastreampb.OperationMetadata, error) {
	var meta datastreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

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

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

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *CreateRouteOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*datastreampb.Route, error) {
	var resp datastreampb.Route
	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 *CreateRouteOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*datastreampb.Route, error) {
	var resp datastreampb.Route
	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 *CreateRouteOperation) Metadata() (*datastreampb.OperationMetadata, error) {
	var meta datastreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

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

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

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *CreateStreamOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*datastreampb.Stream, error) {
	var resp datastreampb.Stream
	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 *CreateStreamOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*datastreampb.Stream, error) {
	var resp datastreampb.Stream
	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 *CreateStreamOperation) Metadata() (*datastreampb.OperationMetadata, error) {
	var meta datastreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

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

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

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *DeleteConnectionProfileOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *DeleteConnectionProfileOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

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

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

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

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *DeletePrivateConnectionOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *DeletePrivateConnectionOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

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

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

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

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *DeleteRouteOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *DeleteRouteOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

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

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

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

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *DeleteStreamOperation) Wait(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.WaitWithInterval(ctx, nil, time.Minute, opts...)
}

// Poll fetches the latest state of the long-running operation.
//
// Poll also fetches the latest metadata, which can be retrieved by Metadata.
//
// If Poll fails, the error is returned and op is unmodified. If Poll succeeds and
// the operation has completed with failure, the error is returned and op.Done will return true.
// If Poll succeeds and the operation has completed successfully,
// op.Done will return true, and the response of the operation is returned.
// If Poll succeeds and the operation has not completed, the returned response and error are both nil.
func (op *DeleteStreamOperation) Poll(ctx context.Context, opts ...gax.CallOption) error {
	return op.lro.Poll(ctx, nil, opts...)
}

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

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

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

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *UpdateConnectionProfileOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*datastreampb.ConnectionProfile, error) {
	var resp datastreampb.ConnectionProfile
	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 *UpdateConnectionProfileOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*datastreampb.ConnectionProfile, error) {
	var resp datastreampb.ConnectionProfile
	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 *UpdateConnectionProfileOperation) Metadata() (*datastreampb.OperationMetadata, error) {
	var meta datastreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

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

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

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

// Wait blocks until the long-running operation is completed, returning the response and any errors encountered.
//
// See documentation of Poll for error-handling information.
func (op *UpdateStreamOperation) Wait(ctx context.Context, opts ...gax.CallOption) (*datastreampb.Stream, error) {
	var resp datastreampb.Stream
	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 *UpdateStreamOperation) Poll(ctx context.Context, opts ...gax.CallOption) (*datastreampb.Stream, error) {
	var resp datastreampb.Stream
	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 *UpdateStreamOperation) Metadata() (*datastreampb.OperationMetadata, error) {
	var meta datastreampb.OperationMetadata
	if err := op.lro.Metadata(&meta); err == longrunning.ErrNoMetadata {
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	return &meta, nil
}

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

// ConnectionProfileIterator manages a stream of *datastreampb.ConnectionProfile.
type ConnectionProfileIterator struct {
	items    []*datastreampb.ConnectionProfile
	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 []*datastreampb.ConnectionProfile, nextPageToken string, err error)
}

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

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

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

// LocationIterator manages a stream of *locationpb.Location.
type LocationIterator struct {
	items    []*locationpb.Location
	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 []*locationpb.Location, nextPageToken string, err error)
}

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

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

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

// PrivateConnectionIterator manages a stream of *datastreampb.PrivateConnection.
type PrivateConnectionIterator struct {
	items    []*datastreampb.PrivateConnection
	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 []*datastreampb.PrivateConnection, nextPageToken string, err error)
}

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

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

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

// RouteIterator manages a stream of *datastreampb.Route.
type RouteIterator struct {
	items    []*datastreampb.Route
	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 []*datastreampb.Route, nextPageToken string, err error)
}

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

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

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

// StreamIterator manages a stream of *datastreampb.Stream.
type StreamIterator struct {
	items    []*datastreampb.Stream
	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 []*datastreampb.Stream, nextPageToken string, err error)
}

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

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

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

// StreamObjectIterator manages a stream of *datastreampb.StreamObject.
type StreamObjectIterator struct {
	items    []*datastreampb.StreamObject
	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 []*datastreampb.StreamObject, nextPageToken string, err error)
}

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

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

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

// StringIterator manages a stream of string.
type StringIterator struct {
	items    []string
	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 []string, nextPageToken string, err error)
}

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

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

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