// Copyright 2025 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 aiplatform

import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log/slog"
	"math"
	"net/http"
	"net/url"
	"time"

	aiplatformpb "cloud.google.com/go/aiplatform/apiv1beta1/aiplatformpb"
	iampb "cloud.google.com/go/iam/apiv1/iampb"
	longrunningpb "cloud.google.com/go/longrunning/autogen/longrunningpb"
	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"
	httptransport "google.golang.org/api/transport/http"
	httpbodypb "google.golang.org/genproto/googleapis/api/httpbody"
	locationpb "google.golang.org/genproto/googleapis/cloud/location"
	"google.golang.org/grpc"
	"google.golang.org/grpc/metadata"
	"google.golang.org/protobuf/encoding/protojson"
	"google.golang.org/protobuf/proto"
)

var newPredictionClientHook clientHook

// PredictionCallOptions contains the retry settings for each method of PredictionClient.
type PredictionCallOptions struct {
	Predict                []gax.CallOption
	RawPredict             []gax.CallOption
	StreamRawPredict       []gax.CallOption
	DirectPredict          []gax.CallOption
	DirectRawPredict       []gax.CallOption
	StreamDirectPredict    []gax.CallOption
	StreamDirectRawPredict []gax.CallOption
	StreamingPredict       []gax.CallOption
	ServerStreamingPredict []gax.CallOption
	StreamingRawPredict    []gax.CallOption
	Explain                []gax.CallOption
	CountTokens            []gax.CallOption
	GenerateContent        []gax.CallOption
	StreamGenerateContent  []gax.CallOption
	ChatCompletions        []gax.CallOption
	GetLocation            []gax.CallOption
	ListLocations          []gax.CallOption
	GetIamPolicy           []gax.CallOption
	SetIamPolicy           []gax.CallOption
	TestIamPermissions     []gax.CallOption
	CancelOperation        []gax.CallOption
	DeleteOperation        []gax.CallOption
	GetOperation           []gax.CallOption
	ListOperations         []gax.CallOption
	WaitOperation          []gax.CallOption
}

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

func defaultPredictionCallOptions() *PredictionCallOptions {
	return &PredictionCallOptions{
		Predict: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
		},
		RawPredict:             []gax.CallOption{},
		StreamRawPredict:       []gax.CallOption{},
		DirectPredict:          []gax.CallOption{},
		DirectRawPredict:       []gax.CallOption{},
		StreamDirectPredict:    []gax.CallOption{},
		StreamDirectRawPredict: []gax.CallOption{},
		StreamingPredict:       []gax.CallOption{},
		ServerStreamingPredict: []gax.CallOption{},
		StreamingRawPredict:    []gax.CallOption{},
		Explain: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
		},
		CountTokens:           []gax.CallOption{},
		GenerateContent:       []gax.CallOption{},
		StreamGenerateContent: []gax.CallOption{},
		ChatCompletions:       []gax.CallOption{},
		GetLocation:           []gax.CallOption{},
		ListLocations:         []gax.CallOption{},
		GetIamPolicy:          []gax.CallOption{},
		SetIamPolicy:          []gax.CallOption{},
		TestIamPermissions:    []gax.CallOption{},
		CancelOperation:       []gax.CallOption{},
		DeleteOperation:       []gax.CallOption{},
		GetOperation:          []gax.CallOption{},
		ListOperations:        []gax.CallOption{},
		WaitOperation:         []gax.CallOption{},
	}
}

func defaultPredictionRESTCallOptions() *PredictionCallOptions {
	return &PredictionCallOptions{
		Predict: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
		},
		RawPredict:             []gax.CallOption{},
		StreamRawPredict:       []gax.CallOption{},
		DirectPredict:          []gax.CallOption{},
		DirectRawPredict:       []gax.CallOption{},
		StreamDirectPredict:    []gax.CallOption{},
		StreamDirectRawPredict: []gax.CallOption{},
		StreamingPredict:       []gax.CallOption{},
		ServerStreamingPredict: []gax.CallOption{},
		StreamingRawPredict:    []gax.CallOption{},
		Explain: []gax.CallOption{
			gax.WithTimeout(5000 * time.Millisecond),
		},
		CountTokens:           []gax.CallOption{},
		GenerateContent:       []gax.CallOption{},
		StreamGenerateContent: []gax.CallOption{},
		ChatCompletions:       []gax.CallOption{},
		GetLocation:           []gax.CallOption{},
		ListLocations:         []gax.CallOption{},
		GetIamPolicy:          []gax.CallOption{},
		SetIamPolicy:          []gax.CallOption{},
		TestIamPermissions:    []gax.CallOption{},
		CancelOperation:       []gax.CallOption{},
		DeleteOperation:       []gax.CallOption{},
		GetOperation:          []gax.CallOption{},
		ListOperations:        []gax.CallOption{},
		WaitOperation:         []gax.CallOption{},
	}
}

// internalPredictionClient is an interface that defines the methods available from Vertex AI API.
type internalPredictionClient interface {
	Close() error
	setGoogleClientInfo(...string)
	Connection() *grpc.ClientConn
	Predict(context.Context, *aiplatformpb.PredictRequest, ...gax.CallOption) (*aiplatformpb.PredictResponse, error)
	RawPredict(context.Context, *aiplatformpb.RawPredictRequest, ...gax.CallOption) (*httpbodypb.HttpBody, error)
	StreamRawPredict(context.Context, *aiplatformpb.StreamRawPredictRequest, ...gax.CallOption) (aiplatformpb.PredictionService_StreamRawPredictClient, error)
	DirectPredict(context.Context, *aiplatformpb.DirectPredictRequest, ...gax.CallOption) (*aiplatformpb.DirectPredictResponse, error)
	DirectRawPredict(context.Context, *aiplatformpb.DirectRawPredictRequest, ...gax.CallOption) (*aiplatformpb.DirectRawPredictResponse, error)
	StreamDirectPredict(context.Context, ...gax.CallOption) (aiplatformpb.PredictionService_StreamDirectPredictClient, error)
	StreamDirectRawPredict(context.Context, ...gax.CallOption) (aiplatformpb.PredictionService_StreamDirectRawPredictClient, error)
	StreamingPredict(context.Context, ...gax.CallOption) (aiplatformpb.PredictionService_StreamingPredictClient, error)
	ServerStreamingPredict(context.Context, *aiplatformpb.StreamingPredictRequest, ...gax.CallOption) (aiplatformpb.PredictionService_ServerStreamingPredictClient, error)
	StreamingRawPredict(context.Context, ...gax.CallOption) (aiplatformpb.PredictionService_StreamingRawPredictClient, error)
	Explain(context.Context, *aiplatformpb.ExplainRequest, ...gax.CallOption) (*aiplatformpb.ExplainResponse, error)
	CountTokens(context.Context, *aiplatformpb.CountTokensRequest, ...gax.CallOption) (*aiplatformpb.CountTokensResponse, error)
	GenerateContent(context.Context, *aiplatformpb.GenerateContentRequest, ...gax.CallOption) (*aiplatformpb.GenerateContentResponse, error)
	StreamGenerateContent(context.Context, *aiplatformpb.GenerateContentRequest, ...gax.CallOption) (aiplatformpb.PredictionService_StreamGenerateContentClient, error)
	ChatCompletions(context.Context, *aiplatformpb.ChatCompletionsRequest, ...gax.CallOption) (aiplatformpb.PredictionService_ChatCompletionsClient, error)
	GetLocation(context.Context, *locationpb.GetLocationRequest, ...gax.CallOption) (*locationpb.Location, error)
	ListLocations(context.Context, *locationpb.ListLocationsRequest, ...gax.CallOption) *LocationIterator
	GetIamPolicy(context.Context, *iampb.GetIamPolicyRequest, ...gax.CallOption) (*iampb.Policy, error)
	SetIamPolicy(context.Context, *iampb.SetIamPolicyRequest, ...gax.CallOption) (*iampb.Policy, error)
	TestIamPermissions(context.Context, *iampb.TestIamPermissionsRequest, ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error)
	CancelOperation(context.Context, *longrunningpb.CancelOperationRequest, ...gax.CallOption) error
	DeleteOperation(context.Context, *longrunningpb.DeleteOperationRequest, ...gax.CallOption) error
	GetOperation(context.Context, *longrunningpb.GetOperationRequest, ...gax.CallOption) (*longrunningpb.Operation, error)
	ListOperations(context.Context, *longrunningpb.ListOperationsRequest, ...gax.CallOption) *OperationIterator
	WaitOperation(context.Context, *longrunningpb.WaitOperationRequest, ...gax.CallOption) (*longrunningpb.Operation, error)
}

// PredictionClient is a client for interacting with Vertex AI API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// A service for online predictions and explanations.
type PredictionClient struct {
	// The internal transport-dependent client.
	internalClient internalPredictionClient

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

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

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

// Predict perform an online prediction.
func (c *PredictionClient) Predict(ctx context.Context, req *aiplatformpb.PredictRequest, opts ...gax.CallOption) (*aiplatformpb.PredictResponse, error) {
	return c.internalClient.Predict(ctx, req, opts...)
}

// RawPredict perform an online prediction with an arbitrary HTTP payload.
//
// The response includes the following HTTP headers:
//
//	X-Vertex-AI-Endpoint-Id: ID of the
//	Endpoint that served this
//	prediction.
//
//	X-Vertex-AI-Deployed-Model-Id: ID of the Endpoint’s
//	DeployedModel that served
//	this prediction.
func (c *PredictionClient) RawPredict(ctx context.Context, req *aiplatformpb.RawPredictRequest, opts ...gax.CallOption) (*httpbodypb.HttpBody, error) {
	return c.internalClient.RawPredict(ctx, req, opts...)
}

// StreamRawPredict perform a streaming online prediction with an arbitrary HTTP payload.
func (c *PredictionClient) StreamRawPredict(ctx context.Context, req *aiplatformpb.StreamRawPredictRequest, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamRawPredictClient, error) {
	return c.internalClient.StreamRawPredict(ctx, req, opts...)
}

// DirectPredict perform an unary online prediction request to a gRPC model server for
// Vertex first-party products and frameworks.
func (c *PredictionClient) DirectPredict(ctx context.Context, req *aiplatformpb.DirectPredictRequest, opts ...gax.CallOption) (*aiplatformpb.DirectPredictResponse, error) {
	return c.internalClient.DirectPredict(ctx, req, opts...)
}

// DirectRawPredict perform an unary online prediction request to a gRPC model server for
// custom containers.
func (c *PredictionClient) DirectRawPredict(ctx context.Context, req *aiplatformpb.DirectRawPredictRequest, opts ...gax.CallOption) (*aiplatformpb.DirectRawPredictResponse, error) {
	return c.internalClient.DirectRawPredict(ctx, req, opts...)
}

// StreamDirectPredict perform a streaming online prediction request to a gRPC model server for
// Vertex first-party products and frameworks.
//
// This method is not supported for the REST transport.
func (c *PredictionClient) StreamDirectPredict(ctx context.Context, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamDirectPredictClient, error) {
	return c.internalClient.StreamDirectPredict(ctx, opts...)
}

// StreamDirectRawPredict perform a streaming online prediction request to a gRPC model server for
// custom containers.
//
// This method is not supported for the REST transport.
func (c *PredictionClient) StreamDirectRawPredict(ctx context.Context, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamDirectRawPredictClient, error) {
	return c.internalClient.StreamDirectRawPredict(ctx, opts...)
}

// StreamingPredict perform a streaming online prediction request for Vertex first-party
// products and frameworks.
//
// This method is not supported for the REST transport.
func (c *PredictionClient) StreamingPredict(ctx context.Context, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamingPredictClient, error) {
	return c.internalClient.StreamingPredict(ctx, opts...)
}

// ServerStreamingPredict perform a server-side streaming online prediction request for Vertex
// LLM streaming.
func (c *PredictionClient) ServerStreamingPredict(ctx context.Context, req *aiplatformpb.StreamingPredictRequest, opts ...gax.CallOption) (aiplatformpb.PredictionService_ServerStreamingPredictClient, error) {
	return c.internalClient.ServerStreamingPredict(ctx, req, opts...)
}

// StreamingRawPredict perform a streaming online prediction request through gRPC.
//
// This method is not supported for the REST transport.
func (c *PredictionClient) StreamingRawPredict(ctx context.Context, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamingRawPredictClient, error) {
	return c.internalClient.StreamingRawPredict(ctx, opts...)
}

// Explain perform an online explanation.
//
// If
// deployed_model_id
// is specified, the corresponding DeployModel must have
// explanation_spec
// populated. If
// deployed_model_id
// is not specified, all DeployedModels must have
// explanation_spec
// populated.
func (c *PredictionClient) Explain(ctx context.Context, req *aiplatformpb.ExplainRequest, opts ...gax.CallOption) (*aiplatformpb.ExplainResponse, error) {
	return c.internalClient.Explain(ctx, req, opts...)
}

// CountTokens perform a token counting.
func (c *PredictionClient) CountTokens(ctx context.Context, req *aiplatformpb.CountTokensRequest, opts ...gax.CallOption) (*aiplatformpb.CountTokensResponse, error) {
	return c.internalClient.CountTokens(ctx, req, opts...)
}

// GenerateContent generate content with multimodal inputs.
func (c *PredictionClient) GenerateContent(ctx context.Context, req *aiplatformpb.GenerateContentRequest, opts ...gax.CallOption) (*aiplatformpb.GenerateContentResponse, error) {
	return c.internalClient.GenerateContent(ctx, req, opts...)
}

// StreamGenerateContent generate content with multimodal inputs with streaming support.
func (c *PredictionClient) StreamGenerateContent(ctx context.Context, req *aiplatformpb.GenerateContentRequest, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamGenerateContentClient, error) {
	return c.internalClient.StreamGenerateContent(ctx, req, opts...)
}

// ChatCompletions exposes an OpenAI-compatible endpoint for chat completions.
func (c *PredictionClient) ChatCompletions(ctx context.Context, req *aiplatformpb.ChatCompletionsRequest, opts ...gax.CallOption) (aiplatformpb.PredictionService_ChatCompletionsClient, error) {
	return c.internalClient.ChatCompletions(ctx, req, opts...)
}

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

// GetIamPolicy gets the access control policy for a resource. Returns an empty policy
// if the resource exists and does not have a policy set.
func (c *PredictionClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	return c.internalClient.GetIamPolicy(ctx, req, opts...)
}

// SetIamPolicy sets the access control policy on the specified resource. Replaces
// any existing policy.
//
// Can return NOT_FOUND, INVALID_ARGUMENT, and PERMISSION_DENIED
// errors.
func (c *PredictionClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	return c.internalClient.SetIamPolicy(ctx, req, opts...)
}

// TestIamPermissions returns permissions that a caller has on the specified resource. If the
// resource does not exist, this will return an empty set of
// permissions, not a NOT_FOUND error.
//
// Note: This operation is designed to be used for building
// permission-aware UIs and command-line tools, not for authorization
// checking. This operation may “fail open” without warning.
func (c *PredictionClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	return c.internalClient.TestIamPermissions(ctx, req, opts...)
}

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

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

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

// ListOperations is a utility method from google.longrunning.Operations.
func (c *PredictionClient) ListOperations(ctx context.Context, req *longrunningpb.ListOperationsRequest, opts ...gax.CallOption) *OperationIterator {
	return c.internalClient.ListOperations(ctx, req, opts...)
}

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

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

	// Points back to the CallOptions field of the containing PredictionClient
	CallOptions **PredictionCallOptions

	// The gRPC API client.
	predictionClient aiplatformpb.PredictionServiceClient

	operationsClient longrunningpb.OperationsClient

	iamPolicyClient iampb.IAMPolicyClient

	locationsClient locationpb.LocationsClient

	// The x-goog-* metadata to be sent with each request.
	xGoogHeaders []string

	logger *slog.Logger
}

// NewPredictionClient creates a new prediction service client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// A service for online predictions and explanations.
func NewPredictionClient(ctx context.Context, opts ...option.ClientOption) (*PredictionClient, error) {
	clientOpts := defaultPredictionGRPCClientOptions()
	if newPredictionClientHook != nil {
		hookOpts, err := newPredictionClientHook(ctx, clientHookParams{})
		if err != nil {
			return nil, err
		}
		clientOpts = append(clientOpts, hookOpts...)
	}

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

	c := &predictionGRPCClient{
		connPool:         connPool,
		predictionClient: aiplatformpb.NewPredictionServiceClient(connPool),
		CallOptions:      &client.CallOptions,
		logger:           internaloption.GetLogger(opts),
		operationsClient: longrunningpb.NewOperationsClient(connPool),
		iamPolicyClient:  iampb.NewIAMPolicyClient(connPool),
		locationsClient:  locationpb.NewLocationsClient(connPool),
	}
	c.setGoogleClientInfo()

	client.internalClient = c

	return &client, nil
}

// Connection returns a connection to the API service.
//
// Deprecated: Connections are now pooled so this method does not always
// return the same resource.
func (c *predictionGRPCClient) 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 *predictionGRPCClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", gax.GoVersion}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "grpc", grpc.Version, "pb", protoVersion)
	c.xGoogHeaders = []string{
		"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 *predictionGRPCClient) Close() error {
	return c.connPool.Close()
}

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

	// The http client.
	httpClient *http.Client

	// The x-goog-* headers to be sent with each request.
	xGoogHeaders []string

	// Points back to the CallOptions field of the containing PredictionClient
	CallOptions **PredictionCallOptions

	logger *slog.Logger
}

// NewPredictionRESTClient creates a new prediction service rest client.
//
// A service for online predictions and explanations.
func NewPredictionRESTClient(ctx context.Context, opts ...option.ClientOption) (*PredictionClient, error) {
	clientOpts := append(defaultPredictionRESTClientOptions(), opts...)
	httpClient, endpoint, err := httptransport.NewClient(ctx, clientOpts...)
	if err != nil {
		return nil, err
	}

	callOpts := defaultPredictionRESTCallOptions()
	c := &predictionRESTClient{
		endpoint:    endpoint,
		httpClient:  httpClient,
		CallOptions: &callOpts,
		logger:      internaloption.GetLogger(opts),
	}
	c.setGoogleClientInfo()

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

func defaultPredictionRESTClientOptions() []option.ClientOption {
	return []option.ClientOption{
		internaloption.WithDefaultEndpoint("https://aiplatform.googleapis.com"),
		internaloption.WithDefaultEndpointTemplate("https://aiplatform.UNIVERSE_DOMAIN"),
		internaloption.WithDefaultMTLSEndpoint("https://aiplatform.mtls.googleapis.com"),
		internaloption.WithDefaultUniverseDomain("googleapis.com"),
		internaloption.WithDefaultAudience("https://aiplatform.googleapis.com/"),
		internaloption.WithDefaultScopes(DefaultAuthScopes()...),
		internaloption.EnableNewAuthLibrary(),
	}
}

// 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 *predictionRESTClient) setGoogleClientInfo(keyval ...string) {
	kv := append([]string{"gl-go", gax.GoVersion}, keyval...)
	kv = append(kv, "gapic", getVersionClient(), "gax", gax.Version, "rest", "UNKNOWN", "pb", protoVersion)
	c.xGoogHeaders = []string{
		"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 *predictionRESTClient) Close() error {
	// Replace httpClient with nil to force cleanup.
	c.httpClient = nil
	return nil
}

// Connection returns a connection to the API service.
//
// Deprecated: This method always returns nil.
func (c *predictionRESTClient) Connection() *grpc.ClientConn {
	return nil
}
func (c *predictionGRPCClient) Predict(ctx context.Context, req *aiplatformpb.PredictRequest, opts ...gax.CallOption) (*aiplatformpb.PredictResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).Predict[0:len((*c.CallOptions).Predict):len((*c.CallOptions).Predict)], opts...)
	var resp *aiplatformpb.PredictResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.predictionClient.Predict, req, settings.GRPC, c.logger, "Predict")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) RawPredict(ctx context.Context, req *aiplatformpb.RawPredictRequest, opts ...gax.CallOption) (*httpbodypb.HttpBody, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).RawPredict[0:len((*c.CallOptions).RawPredict):len((*c.CallOptions).RawPredict)], opts...)
	var resp *httpbodypb.HttpBody
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.predictionClient.RawPredict, req, settings.GRPC, c.logger, "RawPredict")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) StreamRawPredict(ctx context.Context, req *aiplatformpb.StreamRawPredictRequest, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamRawPredictClient, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).StreamRawPredict[0:len((*c.CallOptions).StreamRawPredict):len((*c.CallOptions).StreamRawPredict)], opts...)
	var resp aiplatformpb.PredictionService_StreamRawPredictClient
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		c.logger.DebugContext(ctx, "api streaming client request", "serviceName", serviceName, "rpcName", "StreamRawPredict")
		resp, err = c.predictionClient.StreamRawPredict(ctx, req, settings.GRPC...)
		c.logger.DebugContext(ctx, "api streaming client response", "serviceName", serviceName, "rpcName", "StreamRawPredict")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) DirectPredict(ctx context.Context, req *aiplatformpb.DirectPredictRequest, opts ...gax.CallOption) (*aiplatformpb.DirectPredictResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).DirectPredict[0:len((*c.CallOptions).DirectPredict):len((*c.CallOptions).DirectPredict)], opts...)
	var resp *aiplatformpb.DirectPredictResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.predictionClient.DirectPredict, req, settings.GRPC, c.logger, "DirectPredict")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) DirectRawPredict(ctx context.Context, req *aiplatformpb.DirectRawPredictRequest, opts ...gax.CallOption) (*aiplatformpb.DirectRawPredictResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).DirectRawPredict[0:len((*c.CallOptions).DirectRawPredict):len((*c.CallOptions).DirectRawPredict)], opts...)
	var resp *aiplatformpb.DirectRawPredictResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.predictionClient.DirectRawPredict, req, settings.GRPC, c.logger, "DirectRawPredict")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) StreamDirectPredict(ctx context.Context, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamDirectPredictClient, error) {
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, c.xGoogHeaders...)
	var resp aiplatformpb.PredictionService_StreamDirectPredictClient
	opts = append((*c.CallOptions).StreamDirectPredict[0:len((*c.CallOptions).StreamDirectPredict):len((*c.CallOptions).StreamDirectPredict)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		c.logger.DebugContext(ctx, "api streaming client request", "serviceName", serviceName, "rpcName", "StreamDirectPredict")
		resp, err = c.predictionClient.StreamDirectPredict(ctx, settings.GRPC...)
		c.logger.DebugContext(ctx, "api streaming client response", "serviceName", serviceName, "rpcName", "StreamDirectPredict")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) StreamDirectRawPredict(ctx context.Context, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamDirectRawPredictClient, error) {
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, c.xGoogHeaders...)
	var resp aiplatformpb.PredictionService_StreamDirectRawPredictClient
	opts = append((*c.CallOptions).StreamDirectRawPredict[0:len((*c.CallOptions).StreamDirectRawPredict):len((*c.CallOptions).StreamDirectRawPredict)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		c.logger.DebugContext(ctx, "api streaming client request", "serviceName", serviceName, "rpcName", "StreamDirectRawPredict")
		resp, err = c.predictionClient.StreamDirectRawPredict(ctx, settings.GRPC...)
		c.logger.DebugContext(ctx, "api streaming client response", "serviceName", serviceName, "rpcName", "StreamDirectRawPredict")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) StreamingPredict(ctx context.Context, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamingPredictClient, error) {
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, c.xGoogHeaders...)
	var resp aiplatformpb.PredictionService_StreamingPredictClient
	opts = append((*c.CallOptions).StreamingPredict[0:len((*c.CallOptions).StreamingPredict):len((*c.CallOptions).StreamingPredict)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		c.logger.DebugContext(ctx, "api streaming client request", "serviceName", serviceName, "rpcName", "StreamingPredict")
		resp, err = c.predictionClient.StreamingPredict(ctx, settings.GRPC...)
		c.logger.DebugContext(ctx, "api streaming client response", "serviceName", serviceName, "rpcName", "StreamingPredict")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) ServerStreamingPredict(ctx context.Context, req *aiplatformpb.StreamingPredictRequest, opts ...gax.CallOption) (aiplatformpb.PredictionService_ServerStreamingPredictClient, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).ServerStreamingPredict[0:len((*c.CallOptions).ServerStreamingPredict):len((*c.CallOptions).ServerStreamingPredict)], opts...)
	var resp aiplatformpb.PredictionService_ServerStreamingPredictClient
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		c.logger.DebugContext(ctx, "api streaming client request", "serviceName", serviceName, "rpcName", "ServerStreamingPredict")
		resp, err = c.predictionClient.ServerStreamingPredict(ctx, req, settings.GRPC...)
		c.logger.DebugContext(ctx, "api streaming client response", "serviceName", serviceName, "rpcName", "ServerStreamingPredict")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) StreamingRawPredict(ctx context.Context, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamingRawPredictClient, error) {
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, c.xGoogHeaders...)
	var resp aiplatformpb.PredictionService_StreamingRawPredictClient
	opts = append((*c.CallOptions).StreamingRawPredict[0:len((*c.CallOptions).StreamingRawPredict):len((*c.CallOptions).StreamingRawPredict)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		c.logger.DebugContext(ctx, "api streaming client request", "serviceName", serviceName, "rpcName", "StreamingRawPredict")
		resp, err = c.predictionClient.StreamingRawPredict(ctx, settings.GRPC...)
		c.logger.DebugContext(ctx, "api streaming client response", "serviceName", serviceName, "rpcName", "StreamingRawPredict")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) Explain(ctx context.Context, req *aiplatformpb.ExplainRequest, opts ...gax.CallOption) (*aiplatformpb.ExplainResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).Explain[0:len((*c.CallOptions).Explain):len((*c.CallOptions).Explain)], opts...)
	var resp *aiplatformpb.ExplainResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.predictionClient.Explain, req, settings.GRPC, c.logger, "Explain")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) CountTokens(ctx context.Context, req *aiplatformpb.CountTokensRequest, opts ...gax.CallOption) (*aiplatformpb.CountTokensResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).CountTokens[0:len((*c.CallOptions).CountTokens):len((*c.CallOptions).CountTokens)], opts...)
	var resp *aiplatformpb.CountTokensResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.predictionClient.CountTokens, req, settings.GRPC, c.logger, "CountTokens")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) GenerateContent(ctx context.Context, req *aiplatformpb.GenerateContentRequest, opts ...gax.CallOption) (*aiplatformpb.GenerateContentResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "model", url.QueryEscape(req.GetModel()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).GenerateContent[0:len((*c.CallOptions).GenerateContent):len((*c.CallOptions).GenerateContent)], opts...)
	var resp *aiplatformpb.GenerateContentResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.predictionClient.GenerateContent, req, settings.GRPC, c.logger, "GenerateContent")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) StreamGenerateContent(ctx context.Context, req *aiplatformpb.GenerateContentRequest, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamGenerateContentClient, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "model", url.QueryEscape(req.GetModel()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).StreamGenerateContent[0:len((*c.CallOptions).StreamGenerateContent):len((*c.CallOptions).StreamGenerateContent)], opts...)
	var resp aiplatformpb.PredictionService_StreamGenerateContentClient
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		c.logger.DebugContext(ctx, "api streaming client request", "serviceName", serviceName, "rpcName", "StreamGenerateContent")
		resp, err = c.predictionClient.StreamGenerateContent(ctx, req, settings.GRPC...)
		c.logger.DebugContext(ctx, "api streaming client response", "serviceName", serviceName, "rpcName", "StreamGenerateContent")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) ChatCompletions(ctx context.Context, req *aiplatformpb.ChatCompletionsRequest, opts ...gax.CallOption) (aiplatformpb.PredictionService_ChatCompletionsClient, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).ChatCompletions[0:len((*c.CallOptions).ChatCompletions):len((*c.CallOptions).ChatCompletions)], opts...)
	var resp aiplatformpb.PredictionService_ChatCompletionsClient
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		c.logger.DebugContext(ctx, "api streaming client request", "serviceName", serviceName, "rpcName", "ChatCompletions")
		resp, err = c.predictionClient.ChatCompletions(ctx, req, settings.GRPC...)
		c.logger.DebugContext(ctx, "api streaming client response", "serviceName", serviceName, "rpcName", "ChatCompletions")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) GetLocation(ctx context.Context, req *locationpb.GetLocationRequest, opts ...gax.CallOption) (*locationpb.Location, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	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 = executeRPC(ctx, c.locationsClient.GetLocation, req, settings.GRPC, c.logger, "GetLocation")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) ListLocations(ctx context.Context, req *locationpb.ListLocationsRequest, opts ...gax.CallOption) *LocationIterator {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	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 = executeRPC(ctx, c.locationsClient.ListLocations, req, settings.GRPC, c.logger, "ListLocations")
			return err
		}, opts...)
		if err != nil {
			return nil, "", err
		}

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

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

	return it
}

func (c *predictionGRPCClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).GetIamPolicy[0:len((*c.CallOptions).GetIamPolicy):len((*c.CallOptions).GetIamPolicy)], opts...)
	var resp *iampb.Policy
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.iamPolicyClient.GetIamPolicy, req, settings.GRPC, c.logger, "GetIamPolicy")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).SetIamPolicy[0:len((*c.CallOptions).SetIamPolicy):len((*c.CallOptions).SetIamPolicy)], opts...)
	var resp *iampb.Policy
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.iamPolicyClient.SetIamPolicy, req, settings.GRPC, c.logger, "SetIamPolicy")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).TestIamPermissions[0:len((*c.CallOptions).TestIamPermissions):len((*c.CallOptions).TestIamPermissions)], opts...)
	var resp *iampb.TestIamPermissionsResponse
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.iamPolicyClient.TestIamPermissions, req, settings.GRPC, c.logger, "TestIamPermissions")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

func (c *predictionGRPCClient) CancelOperation(ctx context.Context, req *longrunningpb.CancelOperationRequest, opts ...gax.CallOption) error {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).CancelOperation[0:len((*c.CallOptions).CancelOperation):len((*c.CallOptions).CancelOperation)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		_, err = executeRPC(ctx, c.operationsClient.CancelOperation, req, settings.GRPC, c.logger, "CancelOperation")
		return err
	}, opts...)
	return err
}

func (c *predictionGRPCClient) DeleteOperation(ctx context.Context, req *longrunningpb.DeleteOperationRequest, opts ...gax.CallOption) error {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).DeleteOperation[0:len((*c.CallOptions).DeleteOperation):len((*c.CallOptions).DeleteOperation)], opts...)
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		_, err = executeRPC(ctx, c.operationsClient.DeleteOperation, req, settings.GRPC, c.logger, "DeleteOperation")
		return err
	}, opts...)
	return err
}

func (c *predictionGRPCClient) GetOperation(ctx context.Context, req *longrunningpb.GetOperationRequest, opts ...gax.CallOption) (*longrunningpb.Operation, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

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

func (c *predictionGRPCClient) ListOperations(ctx context.Context, req *longrunningpb.ListOperationsRequest, opts ...gax.CallOption) *OperationIterator {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

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

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

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

	return it
}

func (c *predictionGRPCClient) WaitOperation(ctx context.Context, req *longrunningpb.WaitOperationRequest, opts ...gax.CallOption) (*longrunningpb.Operation, error) {
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

	hds = append(c.xGoogHeaders, hds...)
	ctx = gax.InsertMetadataIntoOutgoingContext(ctx, hds...)
	opts = append((*c.CallOptions).WaitOperation[0:len((*c.CallOptions).WaitOperation):len((*c.CallOptions).WaitOperation)], opts...)
	var resp *longrunningpb.Operation
	err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		var err error
		resp, err = executeRPC(ctx, c.operationsClient.WaitOperation, req, settings.GRPC, c.logger, "WaitOperation")
		return err
	}, opts...)
	if err != nil {
		return nil, err
	}
	return resp, nil
}

// Predict perform an online prediction.
func (c *predictionRESTClient) Predict(ctx context.Context, req *aiplatformpb.PredictRequest, opts ...gax.CallOption) (*aiplatformpb.PredictResponse, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:predict", req.GetEndpoint())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

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

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "Predict")
		if err != nil {
			return err
		}

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

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

// RawPredict perform an online prediction with an arbitrary HTTP payload.
//
// The response includes the following HTTP headers:
//
//	X-Vertex-AI-Endpoint-Id: ID of the
//	Endpoint that served this
//	prediction.
//
//	X-Vertex-AI-Deployed-Model-Id: ID of the Endpoint’s
//	DeployedModel that served
//	this prediction.
func (c *predictionRESTClient) RawPredict(ctx context.Context, req *aiplatformpb.RawPredictRequest, opts ...gax.CallOption) (*httpbodypb.HttpBody, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:rawPredict", req.GetEndpoint())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	opts = append((*c.CallOptions).RawPredict[0:len((*c.CallOptions).RawPredict):len((*c.CallOptions).RawPredict)], opts...)
	resp := &httpbodypb.HttpBody{}
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		buf, httpRsp, err := executeHTTPRequestWithResponse(ctx, c.httpClient, httpReq, c.logger, jsonReq, "RawPredict")
		if err != nil {
			return err
		}

		resp.Data = buf
		if headers := httpRsp.Header; len(headers["Content-Type"]) > 0 {
			resp.ContentType = headers["Content-Type"][0]
		}

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

// StreamRawPredict perform a streaming online prediction with an arbitrary HTTP payload.
func (c *predictionRESTClient) StreamRawPredict(ctx context.Context, req *aiplatformpb.StreamRawPredictRequest, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamRawPredictClient, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:streamRawPredict", req.GetEndpoint())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	var streamClient *streamRawPredictRESTStreamClient
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		httpRsp, err := executeStreamingHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "StreamRawPredict")
		if err != nil {
			return err
		}

		streamClient = &streamRawPredictRESTStreamClient{
			ctx:    ctx,
			md:     metadata.MD(httpRsp.Header),
			stream: gax.NewProtoJSONStreamReader(httpRsp.Body, (&httpbodypb.HttpBody{}).ProtoReflect().Type()),
		}
		return nil
	}, opts...)

	return streamClient, e
}

// streamRawPredictRESTStreamClient is the stream client used to consume the server stream created by
// the REST implementation of StreamRawPredict.
type streamRawPredictRESTStreamClient struct {
	ctx    context.Context
	md     metadata.MD
	stream *gax.ProtoJSONStream
}

func (c *streamRawPredictRESTStreamClient) Recv() (*httpbodypb.HttpBody, error) {
	if err := c.ctx.Err(); err != nil {
		defer c.stream.Close()
		return nil, err
	}
	msg, err := c.stream.Recv()
	if err != nil {
		defer c.stream.Close()
		return nil, err
	}
	res := msg.(*httpbodypb.HttpBody)
	return res, nil
}

func (c *streamRawPredictRESTStreamClient) Header() (metadata.MD, error) {
	return c.md, nil
}

func (c *streamRawPredictRESTStreamClient) Trailer() metadata.MD {
	return c.md
}

func (c *streamRawPredictRESTStreamClient) CloseSend() error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented for a server-stream")
}

func (c *streamRawPredictRESTStreamClient) Context() context.Context {
	return c.ctx
}

func (c *streamRawPredictRESTStreamClient) SendMsg(m interface{}) error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented for a server-stream")
}

func (c *streamRawPredictRESTStreamClient) RecvMsg(m interface{}) error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented, use Recv")
}

// DirectPredict perform an unary online prediction request to a gRPC model server for
// Vertex first-party products and frameworks.
func (c *predictionRESTClient) DirectPredict(ctx context.Context, req *aiplatformpb.DirectPredictRequest, opts ...gax.CallOption) (*aiplatformpb.DirectPredictResponse, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:directPredict", req.GetEndpoint())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

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

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "DirectPredict")
		if err != nil {
			return err
		}

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

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

// DirectRawPredict perform an unary online prediction request to a gRPC model server for
// custom containers.
func (c *predictionRESTClient) DirectRawPredict(ctx context.Context, req *aiplatformpb.DirectRawPredictRequest, opts ...gax.CallOption) (*aiplatformpb.DirectRawPredictResponse, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:directRawPredict", req.GetEndpoint())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

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

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "DirectRawPredict")
		if err != nil {
			return err
		}

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

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

// StreamDirectPredict perform a streaming online prediction request to a gRPC model server for
// Vertex first-party products and frameworks.
//
// This method is not supported for the REST transport.
func (c *predictionRESTClient) StreamDirectPredict(ctx context.Context, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamDirectPredictClient, error) {
	return nil, errors.New("StreamDirectPredict not yet supported for REST clients")
}

// StreamDirectRawPredict perform a streaming online prediction request to a gRPC model server for
// custom containers.
//
// This method is not supported for the REST transport.
func (c *predictionRESTClient) StreamDirectRawPredict(ctx context.Context, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamDirectRawPredictClient, error) {
	return nil, errors.New("StreamDirectRawPredict not yet supported for REST clients")
}

// StreamingPredict perform a streaming online prediction request for Vertex first-party
// products and frameworks.
//
// This method is not supported for the REST transport.
func (c *predictionRESTClient) StreamingPredict(ctx context.Context, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamingPredictClient, error) {
	return nil, errors.New("StreamingPredict not yet supported for REST clients")
}

// ServerStreamingPredict perform a server-side streaming online prediction request for Vertex
// LLM streaming.
func (c *predictionRESTClient) ServerStreamingPredict(ctx context.Context, req *aiplatformpb.StreamingPredictRequest, opts ...gax.CallOption) (aiplatformpb.PredictionService_ServerStreamingPredictClient, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:serverStreamingPredict", req.GetEndpoint())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	var streamClient *serverStreamingPredictRESTStreamClient
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		httpRsp, err := executeStreamingHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "ServerStreamingPredict")
		if err != nil {
			return err
		}

		streamClient = &serverStreamingPredictRESTStreamClient{
			ctx:    ctx,
			md:     metadata.MD(httpRsp.Header),
			stream: gax.NewProtoJSONStreamReader(httpRsp.Body, (&aiplatformpb.StreamingPredictResponse{}).ProtoReflect().Type()),
		}
		return nil
	}, opts...)

	return streamClient, e
}

// serverStreamingPredictRESTStreamClient is the stream client used to consume the server stream created by
// the REST implementation of ServerStreamingPredict.
type serverStreamingPredictRESTStreamClient struct {
	ctx    context.Context
	md     metadata.MD
	stream *gax.ProtoJSONStream
}

func (c *serverStreamingPredictRESTStreamClient) Recv() (*aiplatformpb.StreamingPredictResponse, error) {
	if err := c.ctx.Err(); err != nil {
		defer c.stream.Close()
		return nil, err
	}
	msg, err := c.stream.Recv()
	if err != nil {
		defer c.stream.Close()
		return nil, err
	}
	res := msg.(*aiplatformpb.StreamingPredictResponse)
	return res, nil
}

func (c *serverStreamingPredictRESTStreamClient) Header() (metadata.MD, error) {
	return c.md, nil
}

func (c *serverStreamingPredictRESTStreamClient) Trailer() metadata.MD {
	return c.md
}

func (c *serverStreamingPredictRESTStreamClient) CloseSend() error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented for a server-stream")
}

func (c *serverStreamingPredictRESTStreamClient) Context() context.Context {
	return c.ctx
}

func (c *serverStreamingPredictRESTStreamClient) SendMsg(m interface{}) error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented for a server-stream")
}

func (c *serverStreamingPredictRESTStreamClient) RecvMsg(m interface{}) error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented, use Recv")
}

// StreamingRawPredict perform a streaming online prediction request through gRPC.
//
// This method is not supported for the REST transport.
func (c *predictionRESTClient) StreamingRawPredict(ctx context.Context, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamingRawPredictClient, error) {
	return nil, errors.New("StreamingRawPredict not yet supported for REST clients")
}

// Explain perform an online explanation.
//
// If
// deployed_model_id
// is specified, the corresponding DeployModel must have
// explanation_spec
// populated. If
// deployed_model_id
// is not specified, all DeployedModels must have
// explanation_spec
// populated.
func (c *predictionRESTClient) Explain(ctx context.Context, req *aiplatformpb.ExplainRequest, opts ...gax.CallOption) (*aiplatformpb.ExplainResponse, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:explain", req.GetEndpoint())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

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

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "Explain")
		if err != nil {
			return err
		}

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

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

// CountTokens perform a token counting.
func (c *predictionRESTClient) CountTokens(ctx context.Context, req *aiplatformpb.CountTokensRequest, opts ...gax.CallOption) (*aiplatformpb.CountTokensResponse, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:countTokens", req.GetEndpoint())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

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

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "CountTokens")
		if err != nil {
			return err
		}

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

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

// GenerateContent generate content with multimodal inputs.
func (c *predictionRESTClient) GenerateContent(ctx context.Context, req *aiplatformpb.GenerateContentRequest, opts ...gax.CallOption) (*aiplatformpb.GenerateContentResponse, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:generateContent", req.GetModel())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "model", url.QueryEscape(req.GetModel()))}

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

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "GenerateContent")
		if err != nil {
			return err
		}

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

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

// StreamGenerateContent generate content with multimodal inputs with streaming support.
func (c *predictionRESTClient) StreamGenerateContent(ctx context.Context, req *aiplatformpb.GenerateContentRequest, opts ...gax.CallOption) (aiplatformpb.PredictionService_StreamGenerateContentClient, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:streamGenerateContent", req.GetModel())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "model", url.QueryEscape(req.GetModel()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	var streamClient *streamGenerateContentRESTStreamClient
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		httpRsp, err := executeStreamingHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "StreamGenerateContent")
		if err != nil {
			return err
		}

		streamClient = &streamGenerateContentRESTStreamClient{
			ctx:    ctx,
			md:     metadata.MD(httpRsp.Header),
			stream: gax.NewProtoJSONStreamReader(httpRsp.Body, (&aiplatformpb.GenerateContentResponse{}).ProtoReflect().Type()),
		}
		return nil
	}, opts...)

	return streamClient, e
}

// streamGenerateContentRESTStreamClient is the stream client used to consume the server stream created by
// the REST implementation of StreamGenerateContent.
type streamGenerateContentRESTStreamClient struct {
	ctx    context.Context
	md     metadata.MD
	stream *gax.ProtoJSONStream
}

func (c *streamGenerateContentRESTStreamClient) Recv() (*aiplatformpb.GenerateContentResponse, error) {
	if err := c.ctx.Err(); err != nil {
		defer c.stream.Close()
		return nil, err
	}
	msg, err := c.stream.Recv()
	if err != nil {
		defer c.stream.Close()
		return nil, err
	}
	res := msg.(*aiplatformpb.GenerateContentResponse)
	return res, nil
}

func (c *streamGenerateContentRESTStreamClient) Header() (metadata.MD, error) {
	return c.md, nil
}

func (c *streamGenerateContentRESTStreamClient) Trailer() metadata.MD {
	return c.md
}

func (c *streamGenerateContentRESTStreamClient) CloseSend() error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented for a server-stream")
}

func (c *streamGenerateContentRESTStreamClient) Context() context.Context {
	return c.ctx
}

func (c *streamGenerateContentRESTStreamClient) SendMsg(m interface{}) error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented for a server-stream")
}

func (c *streamGenerateContentRESTStreamClient) RecvMsg(m interface{}) error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented, use Recv")
}

// ChatCompletions exposes an OpenAI-compatible endpoint for chat completions.
func (c *predictionRESTClient) ChatCompletions(ctx context.Context, req *aiplatformpb.ChatCompletionsRequest, opts ...gax.CallOption) (aiplatformpb.PredictionService_ChatCompletionsClient, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	body := req.GetHttpBody()
	jsonReq, err := m.Marshal(body)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v/chat/completions", req.GetEndpoint())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "endpoint", url.QueryEscape(req.GetEndpoint()))}

	hds = append(c.xGoogHeaders, hds...)
	hds = append(hds, "Content-Type", "application/json")
	headers := gax.BuildHeaders(ctx, hds...)
	var streamClient *chatCompletionsRESTStreamClient
	e := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
		if settings.Path != "" {
			baseUrl.Path = settings.Path
		}
		httpReq, err := http.NewRequest("POST", baseUrl.String(), bytes.NewReader(jsonReq))
		if err != nil {
			return err
		}
		httpReq = httpReq.WithContext(ctx)
		httpReq.Header = headers

		httpRsp, err := executeStreamingHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "ChatCompletions")
		if err != nil {
			return err
		}

		streamClient = &chatCompletionsRESTStreamClient{
			ctx:    ctx,
			md:     metadata.MD(httpRsp.Header),
			stream: gax.NewProtoJSONStreamReader(httpRsp.Body, (&httpbodypb.HttpBody{}).ProtoReflect().Type()),
		}
		return nil
	}, opts...)

	return streamClient, e
}

// chatCompletionsRESTStreamClient is the stream client used to consume the server stream created by
// the REST implementation of ChatCompletions.
type chatCompletionsRESTStreamClient struct {
	ctx    context.Context
	md     metadata.MD
	stream *gax.ProtoJSONStream
}

func (c *chatCompletionsRESTStreamClient) Recv() (*httpbodypb.HttpBody, error) {
	if err := c.ctx.Err(); err != nil {
		defer c.stream.Close()
		return nil, err
	}
	msg, err := c.stream.Recv()
	if err != nil {
		defer c.stream.Close()
		return nil, err
	}
	res := msg.(*httpbodypb.HttpBody)
	return res, nil
}

func (c *chatCompletionsRESTStreamClient) Header() (metadata.MD, error) {
	return c.md, nil
}

func (c *chatCompletionsRESTStreamClient) Trailer() metadata.MD {
	return c.md
}

func (c *chatCompletionsRESTStreamClient) CloseSend() error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented for a server-stream")
}

func (c *chatCompletionsRESTStreamClient) Context() context.Context {
	return c.ctx
}

func (c *chatCompletionsRESTStreamClient) SendMsg(m interface{}) error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented for a server-stream")
}

func (c *chatCompletionsRESTStreamClient) RecvMsg(m interface{}) error {
	// This is a no-op to fulfill the interface.
	return errors.New("this method is not implemented, use Recv")
}

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

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

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

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, nil, "GetLocation")
		if err != nil {
			return err
		}

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

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

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

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

		baseUrl.RawQuery = params.Encode()

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

			buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, nil, "ListLocations")
			if err != nil {
				return err
			}
			if err := unm.Unmarshal(buf, resp); err != nil {
				return err
			}

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

// GetIamPolicy gets the access control policy for a resource. Returns an empty policy
// if the resource exists and does not have a policy set.
func (c *predictionRESTClient) GetIamPolicy(ctx context.Context, req *iampb.GetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:getIamPolicy", req.GetResource())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource()))}

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

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "GetIamPolicy")
		if err != nil {
			return err
		}

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

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

// SetIamPolicy sets the access control policy on the specified resource. Replaces
// any existing policy.
//
// Can return NOT_FOUND, INVALID_ARGUMENT, and PERMISSION_DENIED
// errors.
func (c *predictionRESTClient) SetIamPolicy(ctx context.Context, req *iampb.SetIamPolicyRequest, opts ...gax.CallOption) (*iampb.Policy, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:setIamPolicy", req.GetResource())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource()))}

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

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "SetIamPolicy")
		if err != nil {
			return err
		}

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

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

// TestIamPermissions returns permissions that a caller has on the specified resource. If the
// resource does not exist, this will return an empty set of
// permissions, not a NOT_FOUND error.
//
// Note: This operation is designed to be used for building
// permission-aware UIs and command-line tools, not for authorization
// checking. This operation may “fail open” without warning.
func (c *predictionRESTClient) TestIamPermissions(ctx context.Context, req *iampb.TestIamPermissionsRequest, opts ...gax.CallOption) (*iampb.TestIamPermissionsResponse, error) {
	m := protojson.MarshalOptions{AllowPartial: true, UseEnumNumbers: true}
	jsonReq, err := m.Marshal(req)
	if err != nil {
		return nil, err
	}

	baseUrl, err := url.Parse(c.endpoint)
	if err != nil {
		return nil, err
	}
	baseUrl.Path += fmt.Sprintf("/v1beta1/%v:testIamPermissions", req.GetResource())

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "resource", url.QueryEscape(req.GetResource()))}

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

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, jsonReq, "TestIamPermissions")
		if err != nil {
			return err
		}

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

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

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

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

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

		_, err = executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, nil, "CancelOperation")
		return err
	}, opts...)
}

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

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

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

		_, err = executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, nil, "DeleteOperation")
		return err
	}, opts...)
}

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

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

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

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, nil, "GetOperation")
		if err != nil {
			return err
		}

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

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

// ListOperations is a utility method from google.longrunning.Operations.
func (c *predictionRESTClient) ListOperations(ctx context.Context, req *longrunningpb.ListOperationsRequest, opts ...gax.CallOption) *OperationIterator {
	it := &OperationIterator{}
	req = proto.Clone(req).(*longrunningpb.ListOperationsRequest)
	unm := protojson.UnmarshalOptions{AllowPartial: true, DiscardUnknown: true}
	it.InternalFetch = func(pageSize int, pageToken string) ([]*longrunningpb.Operation, string, error) {
		resp := &longrunningpb.ListOperationsResponse{}
		if pageToken != "" {
			req.PageToken = pageToken
		}
		if pageSize > math.MaxInt32 {
			req.PageSize = math.MaxInt32
		} else if pageSize != 0 {
			req.PageSize = int32(pageSize)
		}
		baseUrl, err := url.Parse(c.endpoint)
		if err != nil {
			return nil, "", err
		}
		baseUrl.Path += fmt.Sprintf("/ui/%v/operations", req.GetName())

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

		baseUrl.RawQuery = params.Encode()

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

			buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, nil, "ListOperations")
			if err != nil {
				return err
			}
			if err := unm.Unmarshal(buf, resp); err != nil {
				return err
			}

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

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

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

	return it
}

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

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

	baseUrl.RawQuery = params.Encode()

	// Build HTTP headers from client and context metadata.
	hds := []string{"x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName()))}

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

		buf, err := executeHTTPRequest(ctx, c.httpClient, httpReq, c.logger, nil, "WaitOperation")
		if err != nil {
			return err
		}

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

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