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// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Code generated by protoc-gen-go_gapic. DO NOT EDIT.
package speech
import (
"context"
"fmt"
"math"
"net/url"
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"
speechpb "google.golang.org/genproto/googleapis/cloud/speech/v1p1beta1"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
"google.golang.org/protobuf/proto"
)
var newAdaptationClientHook clientHook
// AdaptationCallOptions contains the retry settings for each method of AdaptationClient.
type AdaptationCallOptions struct {
CreatePhraseSet []gax.CallOption
GetPhraseSet []gax.CallOption
ListPhraseSet []gax.CallOption
UpdatePhraseSet []gax.CallOption
DeletePhraseSet []gax.CallOption
CreateCustomClass []gax.CallOption
GetCustomClass []gax.CallOption
ListCustomClasses []gax.CallOption
UpdateCustomClass []gax.CallOption
DeleteCustomClass []gax.CallOption
}
func defaultAdaptationGRPCClientOptions() []option.ClientOption {
return []option.ClientOption{
internaloption.WithDefaultEndpoint("speech.googleapis.com:443"),
internaloption.WithDefaultMTLSEndpoint("speech.mtls.googleapis.com:443"),
internaloption.WithDefaultAudience("https://speech.googleapis.com/"),
internaloption.WithDefaultScopes(DefaultAuthScopes()...),
option.WithGRPCDialOption(grpc.WithDisableServiceConfig()),
option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
grpc.MaxCallRecvMsgSize(math.MaxInt32))),
}
}
func defaultAdaptationCallOptions() *AdaptationCallOptions {
return &AdaptationCallOptions{
CreatePhraseSet: []gax.CallOption{},
GetPhraseSet: []gax.CallOption{},
ListPhraseSet: []gax.CallOption{},
UpdatePhraseSet: []gax.CallOption{},
DeletePhraseSet: []gax.CallOption{},
CreateCustomClass: []gax.CallOption{},
GetCustomClass: []gax.CallOption{},
ListCustomClasses: []gax.CallOption{},
UpdateCustomClass: []gax.CallOption{},
DeleteCustomClass: []gax.CallOption{},
}
}
// internalAdaptationClient is an interface that defines the methods availaible from Cloud Speech-to-Text API.
type internalAdaptationClient interface {
Close() error
setGoogleClientInfo(...string)
Connection() *grpc.ClientConn
CreatePhraseSet(context.Context, *speechpb.CreatePhraseSetRequest, ...gax.CallOption) (*speechpb.PhraseSet, error)
GetPhraseSet(context.Context, *speechpb.GetPhraseSetRequest, ...gax.CallOption) (*speechpb.PhraseSet, error)
ListPhraseSet(context.Context, *speechpb.ListPhraseSetRequest, ...gax.CallOption) *PhraseSetIterator
UpdatePhraseSet(context.Context, *speechpb.UpdatePhraseSetRequest, ...gax.CallOption) (*speechpb.PhraseSet, error)
DeletePhraseSet(context.Context, *speechpb.DeletePhraseSetRequest, ...gax.CallOption) error
CreateCustomClass(context.Context, *speechpb.CreateCustomClassRequest, ...gax.CallOption) (*speechpb.CustomClass, error)
GetCustomClass(context.Context, *speechpb.GetCustomClassRequest, ...gax.CallOption) (*speechpb.CustomClass, error)
ListCustomClasses(context.Context, *speechpb.ListCustomClassesRequest, ...gax.CallOption) *CustomClassIterator
UpdateCustomClass(context.Context, *speechpb.UpdateCustomClassRequest, ...gax.CallOption) (*speechpb.CustomClass, error)
DeleteCustomClass(context.Context, *speechpb.DeleteCustomClassRequest, ...gax.CallOption) error
}
// AdaptationClient is a client for interacting with Cloud Speech-to-Text API.
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
//
// Service that implements Google Cloud Speech Adaptation API.
type AdaptationClient struct {
// The internal transport-dependent client.
internalClient internalAdaptationClient
// The call options for this service.
CallOptions *AdaptationCallOptions
}
// 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 *AdaptationClient) 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 *AdaptationClient) setGoogleClientInfo(keyval ...string) {
c.internalClient.setGoogleClientInfo(keyval...)
}
// Connection returns a connection to the API service.
//
// Deprecated.
func (c *AdaptationClient) Connection() *grpc.ClientConn {
return c.internalClient.Connection()
}
// CreatePhraseSet create a set of phrase hints. Each item in the set can be a single word or
// a multi-word phrase. The items in the PhraseSet are favored by the
// recognition model when you send a call that includes the PhraseSet.
func (c *AdaptationClient) CreatePhraseSet(ctx context.Context, req *speechpb.CreatePhraseSetRequest, opts ...gax.CallOption) (*speechpb.PhraseSet, error) {
return c.internalClient.CreatePhraseSet(ctx, req, opts...)
}
// GetPhraseSet get a phrase set.
func (c *AdaptationClient) GetPhraseSet(ctx context.Context, req *speechpb.GetPhraseSetRequest, opts ...gax.CallOption) (*speechpb.PhraseSet, error) {
return c.internalClient.GetPhraseSet(ctx, req, opts...)
}
// ListPhraseSet list phrase sets.
func (c *AdaptationClient) ListPhraseSet(ctx context.Context, req *speechpb.ListPhraseSetRequest, opts ...gax.CallOption) *PhraseSetIterator {
return c.internalClient.ListPhraseSet(ctx, req, opts...)
}
// UpdatePhraseSet update a phrase set.
func (c *AdaptationClient) UpdatePhraseSet(ctx context.Context, req *speechpb.UpdatePhraseSetRequest, opts ...gax.CallOption) (*speechpb.PhraseSet, error) {
return c.internalClient.UpdatePhraseSet(ctx, req, opts...)
}
// DeletePhraseSet delete a phrase set.
func (c *AdaptationClient) DeletePhraseSet(ctx context.Context, req *speechpb.DeletePhraseSetRequest, opts ...gax.CallOption) error {
return c.internalClient.DeletePhraseSet(ctx, req, opts...)
}
// CreateCustomClass create a custom class.
func (c *AdaptationClient) CreateCustomClass(ctx context.Context, req *speechpb.CreateCustomClassRequest, opts ...gax.CallOption) (*speechpb.CustomClass, error) {
return c.internalClient.CreateCustomClass(ctx, req, opts...)
}
// GetCustomClass get a custom class.
func (c *AdaptationClient) GetCustomClass(ctx context.Context, req *speechpb.GetCustomClassRequest, opts ...gax.CallOption) (*speechpb.CustomClass, error) {
return c.internalClient.GetCustomClass(ctx, req, opts...)
}
// ListCustomClasses list custom classes.
func (c *AdaptationClient) ListCustomClasses(ctx context.Context, req *speechpb.ListCustomClassesRequest, opts ...gax.CallOption) *CustomClassIterator {
return c.internalClient.ListCustomClasses(ctx, req, opts...)
}
// UpdateCustomClass update a custom class.
func (c *AdaptationClient) UpdateCustomClass(ctx context.Context, req *speechpb.UpdateCustomClassRequest, opts ...gax.CallOption) (*speechpb.CustomClass, error) {
return c.internalClient.UpdateCustomClass(ctx, req, opts...)
}
// DeleteCustomClass delete a custom class.
func (c *AdaptationClient) DeleteCustomClass(ctx context.Context, req *speechpb.DeleteCustomClassRequest, opts ...gax.CallOption) error {
return c.internalClient.DeleteCustomClass(ctx, req, opts...)
}
// adaptationGRPCClient is a client for interacting with Cloud Speech-to-Text API over gRPC transport.
//
// Methods, except Close, may be called concurrently. However, fields must not be modified concurrently with method calls.
type adaptationGRPCClient struct {
// Connection pool of gRPC connections to the service.
connPool gtransport.ConnPool
// flag to opt out of default deadlines via GOOGLE_API_GO_EXPERIMENTAL_DISABLE_DEFAULT_DEADLINE
disableDeadlines bool
// Points back to the CallOptions field of the containing AdaptationClient
CallOptions **AdaptationCallOptions
// The gRPC API client.
adaptationClient speechpb.AdaptationClient
// The x-goog-* metadata to be sent with each request.
xGoogMetadata metadata.MD
}
// NewAdaptationClient creates a new adaptation client based on gRPC.
// The returned client must be Closed when it is done being used to clean up its underlying connections.
//
// Service that implements Google Cloud Speech Adaptation API.
func NewAdaptationClient(ctx context.Context, opts ...option.ClientOption) (*AdaptationClient, error) {
clientOpts := defaultAdaptationGRPCClientOptions()
if newAdaptationClientHook != nil {
hookOpts, err := newAdaptationClientHook(ctx, clientHookParams{})
if err != nil {
return nil, err
}
clientOpts = append(clientOpts, hookOpts...)
}
disableDeadlines, err := checkDisableDeadlines()
if err != nil {
return nil, err
}
connPool, err := gtransport.DialPool(ctx, append(clientOpts, opts...)...)
if err != nil {
return nil, err
}
client := AdaptationClient{CallOptions: defaultAdaptationCallOptions()}
c := &adaptationGRPCClient{
connPool: connPool,
disableDeadlines: disableDeadlines,
adaptationClient: speechpb.NewAdaptationClient(connPool),
CallOptions: &client.CallOptions,
}
c.setGoogleClientInfo()
client.internalClient = c
return &client, nil
}
// Connection returns a connection to the API service.
//
// Deprecated.
func (c *adaptationGRPCClient) 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 *adaptationGRPCClient) setGoogleClientInfo(keyval ...string) {
kv := append([]string{"gl-go", versionGo()}, keyval...)
kv = append(kv, "gapic", versionClient, "gax", gax.Version, "grpc", grpc.Version)
c.xGoogMetadata = metadata.Pairs("x-goog-api-client", gax.XGoogHeader(kv...))
}
// Close closes the connection to the API service. The user should invoke this when
// the client is no longer required.
func (c *adaptationGRPCClient) Close() error {
return c.connPool.Close()
}
func (c *adaptationGRPCClient) CreatePhraseSet(ctx context.Context, req *speechpb.CreatePhraseSetRequest, opts ...gax.CallOption) (*speechpb.PhraseSet, error) {
md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
ctx = insertMetadata(ctx, c.xGoogMetadata, md)
opts = append((*c.CallOptions).CreatePhraseSet[0:len((*c.CallOptions).CreatePhraseSet):len((*c.CallOptions).CreatePhraseSet)], opts...)
var resp *speechpb.PhraseSet
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.adaptationClient.CreatePhraseSet(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
func (c *adaptationGRPCClient) GetPhraseSet(ctx context.Context, req *speechpb.GetPhraseSetRequest, opts ...gax.CallOption) (*speechpb.PhraseSet, error) {
md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
ctx = insertMetadata(ctx, c.xGoogMetadata, md)
opts = append((*c.CallOptions).GetPhraseSet[0:len((*c.CallOptions).GetPhraseSet):len((*c.CallOptions).GetPhraseSet)], opts...)
var resp *speechpb.PhraseSet
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.adaptationClient.GetPhraseSet(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
func (c *adaptationGRPCClient) ListPhraseSet(ctx context.Context, req *speechpb.ListPhraseSetRequest, opts ...gax.CallOption) *PhraseSetIterator {
md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
ctx = insertMetadata(ctx, c.xGoogMetadata, md)
opts = append((*c.CallOptions).ListPhraseSet[0:len((*c.CallOptions).ListPhraseSet):len((*c.CallOptions).ListPhraseSet)], opts...)
it := &PhraseSetIterator{}
req = proto.Clone(req).(*speechpb.ListPhraseSetRequest)
it.InternalFetch = func(pageSize int, pageToken string) ([]*speechpb.PhraseSet, string, error) {
var resp *speechpb.ListPhraseSetResponse
req.PageToken = pageToken
if pageSize > math.MaxInt32 {
req.PageSize = math.MaxInt32
} else {
req.PageSize = int32(pageSize)
}
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.adaptationClient.ListPhraseSet(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, "", err
}
it.Response = resp
return resp.GetPhraseSets(), 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 *adaptationGRPCClient) UpdatePhraseSet(ctx context.Context, req *speechpb.UpdatePhraseSetRequest, opts ...gax.CallOption) (*speechpb.PhraseSet, error) {
md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "phrase_set.name", url.QueryEscape(req.GetPhraseSet().GetName())))
ctx = insertMetadata(ctx, c.xGoogMetadata, md)
opts = append((*c.CallOptions).UpdatePhraseSet[0:len((*c.CallOptions).UpdatePhraseSet):len((*c.CallOptions).UpdatePhraseSet)], opts...)
var resp *speechpb.PhraseSet
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.adaptationClient.UpdatePhraseSet(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
func (c *adaptationGRPCClient) DeletePhraseSet(ctx context.Context, req *speechpb.DeletePhraseSetRequest, opts ...gax.CallOption) error {
md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
ctx = insertMetadata(ctx, c.xGoogMetadata, md)
opts = append((*c.CallOptions).DeletePhraseSet[0:len((*c.CallOptions).DeletePhraseSet):len((*c.CallOptions).DeletePhraseSet)], opts...)
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
_, err = c.adaptationClient.DeletePhraseSet(ctx, req, settings.GRPC...)
return err
}, opts...)
return err
}
func (c *adaptationGRPCClient) CreateCustomClass(ctx context.Context, req *speechpb.CreateCustomClassRequest, opts ...gax.CallOption) (*speechpb.CustomClass, error) {
md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
ctx = insertMetadata(ctx, c.xGoogMetadata, md)
opts = append((*c.CallOptions).CreateCustomClass[0:len((*c.CallOptions).CreateCustomClass):len((*c.CallOptions).CreateCustomClass)], opts...)
var resp *speechpb.CustomClass
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.adaptationClient.CreateCustomClass(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
func (c *adaptationGRPCClient) GetCustomClass(ctx context.Context, req *speechpb.GetCustomClassRequest, opts ...gax.CallOption) (*speechpb.CustomClass, error) {
md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
ctx = insertMetadata(ctx, c.xGoogMetadata, md)
opts = append((*c.CallOptions).GetCustomClass[0:len((*c.CallOptions).GetCustomClass):len((*c.CallOptions).GetCustomClass)], opts...)
var resp *speechpb.CustomClass
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.adaptationClient.GetCustomClass(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
func (c *adaptationGRPCClient) ListCustomClasses(ctx context.Context, req *speechpb.ListCustomClassesRequest, opts ...gax.CallOption) *CustomClassIterator {
md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "parent", url.QueryEscape(req.GetParent())))
ctx = insertMetadata(ctx, c.xGoogMetadata, md)
opts = append((*c.CallOptions).ListCustomClasses[0:len((*c.CallOptions).ListCustomClasses):len((*c.CallOptions).ListCustomClasses)], opts...)
it := &CustomClassIterator{}
req = proto.Clone(req).(*speechpb.ListCustomClassesRequest)
it.InternalFetch = func(pageSize int, pageToken string) ([]*speechpb.CustomClass, string, error) {
var resp *speechpb.ListCustomClassesResponse
req.PageToken = pageToken
if pageSize > math.MaxInt32 {
req.PageSize = math.MaxInt32
} else {
req.PageSize = int32(pageSize)
}
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.adaptationClient.ListCustomClasses(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, "", err
}
it.Response = resp
return resp.GetCustomClasses(), 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 *adaptationGRPCClient) UpdateCustomClass(ctx context.Context, req *speechpb.UpdateCustomClassRequest, opts ...gax.CallOption) (*speechpb.CustomClass, error) {
md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "custom_class.name", url.QueryEscape(req.GetCustomClass().GetName())))
ctx = insertMetadata(ctx, c.xGoogMetadata, md)
opts = append((*c.CallOptions).UpdateCustomClass[0:len((*c.CallOptions).UpdateCustomClass):len((*c.CallOptions).UpdateCustomClass)], opts...)
var resp *speechpb.CustomClass
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
resp, err = c.adaptationClient.UpdateCustomClass(ctx, req, settings.GRPC...)
return err
}, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
func (c *adaptationGRPCClient) DeleteCustomClass(ctx context.Context, req *speechpb.DeleteCustomClassRequest, opts ...gax.CallOption) error {
md := metadata.Pairs("x-goog-request-params", fmt.Sprintf("%s=%v", "name", url.QueryEscape(req.GetName())))
ctx = insertMetadata(ctx, c.xGoogMetadata, md)
opts = append((*c.CallOptions).DeleteCustomClass[0:len((*c.CallOptions).DeleteCustomClass):len((*c.CallOptions).DeleteCustomClass)], opts...)
err := gax.Invoke(ctx, func(ctx context.Context, settings gax.CallSettings) error {
var err error
_, err = c.adaptationClient.DeleteCustomClass(ctx, req, settings.GRPC...)
return err
}, opts...)
return err
}
// CustomClassIterator manages a stream of *speechpb.CustomClass.
type CustomClassIterator struct {
items []*speechpb.CustomClass
pageInfo *iterator.PageInfo
nextFunc func() error
// Response is the raw response for the current page.
// It must be cast to the RPC response type.
// Calling Next() or InternalFetch() updates this value.
Response interface{}
// InternalFetch is for use by the Google Cloud Libraries only.
// It is not part of the stable interface of this package.
//
// InternalFetch returns results from a single call to the underlying RPC.
// The number of results is no greater than pageSize.
// If there are no more results, nextPageToken is empty and err is nil.
InternalFetch func(pageSize int, pageToken string) (results []*speechpb.CustomClass, nextPageToken string, err error)
}
// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *CustomClassIterator) PageInfo() *iterator.PageInfo {
return it.pageInfo
}
// Next returns the next result. Its second return value is iterator.Done if there are no more
// results. Once Next returns Done, all subsequent calls will return Done.
func (it *CustomClassIterator) Next() (*speechpb.CustomClass, error) {
var item *speechpb.CustomClass
if err := it.nextFunc(); err != nil {
return item, err
}
item = it.items[0]
it.items = it.items[1:]
return item, nil
}
func (it *CustomClassIterator) bufLen() int {
return len(it.items)
}
func (it *CustomClassIterator) takeBuf() interface{} {
b := it.items
it.items = nil
return b
}
// PhraseSetIterator manages a stream of *speechpb.PhraseSet.
type PhraseSetIterator struct {
items []*speechpb.PhraseSet
pageInfo *iterator.PageInfo
nextFunc func() error
// Response is the raw response for the current page.
// It must be cast to the RPC response type.
// Calling Next() or InternalFetch() updates this value.
Response interface{}
// InternalFetch is for use by the Google Cloud Libraries only.
// It is not part of the stable interface of this package.
//
// InternalFetch returns results from a single call to the underlying RPC.
// The number of results is no greater than pageSize.
// If there are no more results, nextPageToken is empty and err is nil.
InternalFetch func(pageSize int, pageToken string) (results []*speechpb.PhraseSet, nextPageToken string, err error)
}
// PageInfo supports pagination. See the google.golang.org/api/iterator package for details.
func (it *PhraseSetIterator) PageInfo() *iterator.PageInfo {
return it.pageInfo
}
// Next returns the next result. Its second return value is iterator.Done if there are no more
// results. Once Next returns Done, all subsequent calls will return Done.
func (it *PhraseSetIterator) Next() (*speechpb.PhraseSet, error) {
var item *speechpb.PhraseSet
if err := it.nextFunc(); err != nil {
return item, err
}
item = it.items[0]
it.items = it.items[1:]
return item, nil
}
func (it *PhraseSetIterator) bufLen() int {
return len(it.items)
}
func (it *PhraseSetIterator) takeBuf() interface{} {
b := it.items
it.items = nil
return b
}