// This is a generated file (see the discoveryapis_generator project).

// ignore_for_file: camel_case_types
// ignore_for_file: comment_references
// ignore_for_file: directives_ordering
// ignore_for_file: file_names
// ignore_for_file: library_names
// ignore_for_file: lines_longer_than_80_chars
// ignore_for_file: non_constant_identifier_names
// ignore_for_file: prefer_expression_function_bodies
// ignore_for_file: prefer_final_locals
// ignore_for_file: prefer_interpolation_to_compose_strings
// ignore_for_file: unnecessary_brace_in_string_interps
// ignore_for_file: unnecessary_cast
// ignore_for_file: unnecessary_lambdas
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library googleapis.speech.v1;

import 'dart:core' as core;
import 'dart:async' as async;
import 'dart:convert' as convert;

import 'package:_discoveryapis_commons/_discoveryapis_commons.dart' as commons;
import 'package:http/http.dart' as http;

export 'package:_discoveryapis_commons/_discoveryapis_commons.dart'
    show ApiRequestError, DetailedApiRequestError;

const userAgent = 'dart-api-client speech/v1';

/// Converts audio to text by applying powerful neural network models.
class SpeechApi {
  /// View and manage your data across Google Cloud Platform services
  static const cloudPlatformScope =
      'https://www.googleapis.com/auth/cloud-platform';

  final commons.ApiRequester _requester;

  OperationsResourceApi get operations => OperationsResourceApi(_requester);
  ProjectsResourceApi get projects => ProjectsResourceApi(_requester);
  SpeechResourceApi get speech => SpeechResourceApi(_requester);

  SpeechApi(http.Client client,
      {core.String rootUrl = 'https://speech.googleapis.com/',
      core.String servicePath = ''})
      : _requester =
            commons.ApiRequester(client, rootUrl, servicePath, userAgent);
}

class OperationsResourceApi {
  final commons.ApiRequester _requester;

  OperationsResourceApi(commons.ApiRequester client) : _requester = client;

  /// Gets the latest state of a long-running operation. Clients can use this
  /// method to poll the operation result at intervals as recommended by the API
  /// service.
  ///
  /// Request parameters:
  ///
  /// [name] - The name of the operation resource.
  /// Value must have pattern "^.*$".
  ///
  /// [$fields] - Selector specifying which fields to include in a partial
  /// response.
  ///
  /// Completes with a [Operation].
  ///
  /// Completes with a [commons.ApiRequestError] if the API endpoint returned an
  /// error.
  ///
  /// If the used [http.Client] completes with an error when making a REST call,
  /// this method will complete with the same error.
  async.Future<Operation> get(
    core.String name, {
    core.String $fields,
  }) {
    core.String _url;
    final _queryParams = <core.String, core.List<core.String>>{};
    commons.Media _uploadMedia;
    commons.UploadOptions _uploadOptions;
    var _downloadOptions = commons.DownloadOptions.Metadata;
    core.String _body;

    if (name == null) {
      throw core.ArgumentError('Parameter name is required.');
    }
    if ($fields != null) {
      _queryParams['fields'] = [$fields];
    }

    _url = 'v1/operations/' + commons.Escaper.ecapeVariableReserved('$name');

    final _response = _requester.request(
      _url,
      'GET',
      body: _body,
      queryParams: _queryParams,
      uploadOptions: _uploadOptions,
      uploadMedia: _uploadMedia,
      downloadOptions: _downloadOptions,
    );
    return _response.then((data) => Operation.fromJson(data));
  }

  /// Lists operations that match the specified filter in the request. If the
  /// server doesn't support this method, it returns `UNIMPLEMENTED`. NOTE: the
  /// `name` binding allows API services to override the binding to use
  /// different resource name schemes, such as `users / * /operations`. To
  /// override the binding, API services can add a binding such as
  /// `"/v1/{name=users / * }/operations"` to their service configuration. For
  /// backwards compatibility, the default name includes the operations
  /// collection id, however overriding users must ensure the name binding is
  /// the parent resource, without the operations collection id.
  ///
  /// Request parameters:
  ///
  /// [filter] - The standard list filter.
  ///
  /// [name] - The name of the operation's parent resource.
  ///
  /// [pageSize] - The standard list page size.
  ///
  /// [pageToken] - The standard list page token.
  ///
  /// [$fields] - Selector specifying which fields to include in a partial
  /// response.
  ///
  /// Completes with a [ListOperationsResponse].
  ///
  /// Completes with a [commons.ApiRequestError] if the API endpoint returned an
  /// error.
  ///
  /// If the used [http.Client] completes with an error when making a REST call,
  /// this method will complete with the same error.
  async.Future<ListOperationsResponse> list({
    core.String filter,
    core.String name,
    core.int pageSize,
    core.String pageToken,
    core.String $fields,
  }) {
    core.String _url;
    final _queryParams = <core.String, core.List<core.String>>{};
    commons.Media _uploadMedia;
    commons.UploadOptions _uploadOptions;
    var _downloadOptions = commons.DownloadOptions.Metadata;
    core.String _body;

    if (filter != null) {
      _queryParams['filter'] = [filter];
    }
    if (name != null) {
      _queryParams['name'] = [name];
    }
    if (pageSize != null) {
      _queryParams['pageSize'] = ['${pageSize}'];
    }
    if (pageToken != null) {
      _queryParams['pageToken'] = [pageToken];
    }
    if ($fields != null) {
      _queryParams['fields'] = [$fields];
    }

    _url = 'v1/operations';

    final _response = _requester.request(
      _url,
      'GET',
      body: _body,
      queryParams: _queryParams,
      uploadOptions: _uploadOptions,
      uploadMedia: _uploadMedia,
      downloadOptions: _downloadOptions,
    );
    return _response.then((data) => ListOperationsResponse.fromJson(data));
  }
}

class ProjectsResourceApi {
  final commons.ApiRequester _requester;

  ProjectsLocationsResourceApi get locations =>
      ProjectsLocationsResourceApi(_requester);

  ProjectsResourceApi(commons.ApiRequester client) : _requester = client;
}

class ProjectsLocationsResourceApi {
  final commons.ApiRequester _requester;

  ProjectsLocationsOperationsResourceApi get operations =>
      ProjectsLocationsOperationsResourceApi(_requester);

  ProjectsLocationsResourceApi(commons.ApiRequester client)
      : _requester = client;
}

class ProjectsLocationsOperationsResourceApi {
  final commons.ApiRequester _requester;

  ProjectsLocationsOperationsResourceApi(commons.ApiRequester client)
      : _requester = client;

  /// Gets the latest state of a long-running operation. Clients can use this
  /// method to poll the operation result at intervals as recommended by the API
  /// service.
  ///
  /// Request parameters:
  ///
  /// [name] - The name of the operation resource.
  /// Value must have pattern
  /// "^projects/[^/]+/locations/[^/]+/operations/[^/]+$".
  ///
  /// [$fields] - Selector specifying which fields to include in a partial
  /// response.
  ///
  /// Completes with a [Operation].
  ///
  /// Completes with a [commons.ApiRequestError] if the API endpoint returned an
  /// error.
  ///
  /// If the used [http.Client] completes with an error when making a REST call,
  /// this method will complete with the same error.
  async.Future<Operation> get(
    core.String name, {
    core.String $fields,
  }) {
    core.String _url;
    final _queryParams = <core.String, core.List<core.String>>{};
    commons.Media _uploadMedia;
    commons.UploadOptions _uploadOptions;
    var _downloadOptions = commons.DownloadOptions.Metadata;
    core.String _body;

    if (name == null) {
      throw core.ArgumentError('Parameter name is required.');
    }
    if ($fields != null) {
      _queryParams['fields'] = [$fields];
    }

    _url = 'v1/' + commons.Escaper.ecapeVariableReserved('$name');

    final _response = _requester.request(
      _url,
      'GET',
      body: _body,
      queryParams: _queryParams,
      uploadOptions: _uploadOptions,
      uploadMedia: _uploadMedia,
      downloadOptions: _downloadOptions,
    );
    return _response.then((data) => Operation.fromJson(data));
  }

  /// Lists operations that match the specified filter in the request. If the
  /// server doesn't support this method, it returns `UNIMPLEMENTED`. NOTE: the
  /// `name` binding allows API services to override the binding to use
  /// different resource name schemes, such as `users / * /operations`. To
  /// override the binding, API services can add a binding such as
  /// `"/v1/{name=users / * }/operations"` to their service configuration. For
  /// backwards compatibility, the default name includes the operations
  /// collection id, however overriding users must ensure the name binding is
  /// the parent resource, without the operations collection id.
  ///
  /// Request parameters:
  ///
  /// [name] - The name of the operation's parent resource.
  /// Value must have pattern "^projects/[^/]+/locations/[^/]+$".
  ///
  /// [filter] - The standard list filter.
  ///
  /// [pageSize] - The standard list page size.
  ///
  /// [pageToken] - The standard list page token.
  ///
  /// [$fields] - Selector specifying which fields to include in a partial
  /// response.
  ///
  /// Completes with a [ListOperationsResponse].
  ///
  /// Completes with a [commons.ApiRequestError] if the API endpoint returned an
  /// error.
  ///
  /// If the used [http.Client] completes with an error when making a REST call,
  /// this method will complete with the same error.
  async.Future<ListOperationsResponse> list(
    core.String name, {
    core.String filter,
    core.int pageSize,
    core.String pageToken,
    core.String $fields,
  }) {
    core.String _url;
    final _queryParams = <core.String, core.List<core.String>>{};
    commons.Media _uploadMedia;
    commons.UploadOptions _uploadOptions;
    var _downloadOptions = commons.DownloadOptions.Metadata;
    core.String _body;

    if (name == null) {
      throw core.ArgumentError('Parameter name is required.');
    }
    if (filter != null) {
      _queryParams['filter'] = [filter];
    }
    if (pageSize != null) {
      _queryParams['pageSize'] = ['${pageSize}'];
    }
    if (pageToken != null) {
      _queryParams['pageToken'] = [pageToken];
    }
    if ($fields != null) {
      _queryParams['fields'] = [$fields];
    }

    _url =
        'v1/' + commons.Escaper.ecapeVariableReserved('$name') + '/operations';

    final _response = _requester.request(
      _url,
      'GET',
      body: _body,
      queryParams: _queryParams,
      uploadOptions: _uploadOptions,
      uploadMedia: _uploadMedia,
      downloadOptions: _downloadOptions,
    );
    return _response.then((data) => ListOperationsResponse.fromJson(data));
  }
}

class SpeechResourceApi {
  final commons.ApiRequester _requester;

  SpeechResourceApi(commons.ApiRequester client) : _requester = client;

  /// Performs asynchronous speech recognition: receive results via the
  /// google.longrunning.Operations interface. Returns either an
  /// `Operation.error` or an `Operation.response` which contains a
  /// `LongRunningRecognizeResponse` message. For more information on
  /// asynchronous speech recognition, see the
  /// [how-to](https://cloud.google.com/speech-to-text/docs/async-recognize).
  ///
  /// [request] - The metadata request object.
  ///
  /// Request parameters:
  ///
  /// [$fields] - Selector specifying which fields to include in a partial
  /// response.
  ///
  /// Completes with a [Operation].
  ///
  /// Completes with a [commons.ApiRequestError] if the API endpoint returned an
  /// error.
  ///
  /// If the used [http.Client] completes with an error when making a REST call,
  /// this method will complete with the same error.
  async.Future<Operation> longrunningrecognize(
    LongRunningRecognizeRequest request, {
    core.String $fields,
  }) {
    core.String _url;
    final _queryParams = <core.String, core.List<core.String>>{};
    commons.Media _uploadMedia;
    commons.UploadOptions _uploadOptions;
    var _downloadOptions = commons.DownloadOptions.Metadata;
    core.String _body;

    if (request != null) {
      _body = convert.json.encode(request.toJson());
    }
    if ($fields != null) {
      _queryParams['fields'] = [$fields];
    }

    _url = 'v1/speech:longrunningrecognize';

    final _response = _requester.request(
      _url,
      'POST',
      body: _body,
      queryParams: _queryParams,
      uploadOptions: _uploadOptions,
      uploadMedia: _uploadMedia,
      downloadOptions: _downloadOptions,
    );
    return _response.then((data) => Operation.fromJson(data));
  }

  /// Performs synchronous speech recognition: receive results after all audio
  /// has been sent and processed.
  ///
  /// [request] - The metadata request object.
  ///
  /// Request parameters:
  ///
  /// [$fields] - Selector specifying which fields to include in a partial
  /// response.
  ///
  /// Completes with a [RecognizeResponse].
  ///
  /// Completes with a [commons.ApiRequestError] if the API endpoint returned an
  /// error.
  ///
  /// If the used [http.Client] completes with an error when making a REST call,
  /// this method will complete with the same error.
  async.Future<RecognizeResponse> recognize(
    RecognizeRequest request, {
    core.String $fields,
  }) {
    core.String _url;
    final _queryParams = <core.String, core.List<core.String>>{};
    commons.Media _uploadMedia;
    commons.UploadOptions _uploadOptions;
    var _downloadOptions = commons.DownloadOptions.Metadata;
    core.String _body;

    if (request != null) {
      _body = convert.json.encode(request.toJson());
    }
    if ($fields != null) {
      _queryParams['fields'] = [$fields];
    }

    _url = 'v1/speech:recognize';

    final _response = _requester.request(
      _url,
      'POST',
      body: _body,
      queryParams: _queryParams,
      uploadOptions: _uploadOptions,
      uploadMedia: _uploadMedia,
      downloadOptions: _downloadOptions,
    );
    return _response.then((data) => RecognizeResponse.fromJson(data));
  }
}

/// The response message for Operations.ListOperations.
class ListOperationsResponse {
  /// The standard List next-page token.
  core.String nextPageToken;

  /// A list of operations that matches the specified filter in the request.
  core.List<Operation> operations;

  ListOperationsResponse();

  ListOperationsResponse.fromJson(core.Map _json) {
    if (_json.containsKey('nextPageToken')) {
      nextPageToken = _json['nextPageToken'] as core.String;
    }
    if (_json.containsKey('operations')) {
      operations = (_json['operations'] as core.List)
          .map<Operation>((value) => Operation.fromJson(value))
          .toList();
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (nextPageToken != null) {
      _json['nextPageToken'] = nextPageToken;
    }
    if (operations != null) {
      _json['operations'] = operations.map((value) => value.toJson()).toList();
    }
    return _json;
  }
}

/// Describes the progress of a long-running `LongRunningRecognize` call. It is
/// included in the `metadata` field of the `Operation` returned by the
/// `GetOperation` call of the `google::longrunning::Operations` service.
class LongRunningRecognizeMetadata {
  /// Time of the most recent processing update.
  core.String lastUpdateTime;

  /// Approximate percentage of audio processed thus far. Guaranteed to be 100
  /// when the audio is fully processed and the results are available.
  core.int progressPercent;

  /// Time when the request was received.
  core.String startTime;

  /// Output only. The URI of the audio file being transcribed. Empty if the
  /// audio was sent as byte content.
  core.String uri;

  LongRunningRecognizeMetadata();

  LongRunningRecognizeMetadata.fromJson(core.Map _json) {
    if (_json.containsKey('lastUpdateTime')) {
      lastUpdateTime = _json['lastUpdateTime'] as core.String;
    }
    if (_json.containsKey('progressPercent')) {
      progressPercent = _json['progressPercent'] as core.int;
    }
    if (_json.containsKey('startTime')) {
      startTime = _json['startTime'] as core.String;
    }
    if (_json.containsKey('uri')) {
      uri = _json['uri'] as core.String;
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (lastUpdateTime != null) {
      _json['lastUpdateTime'] = lastUpdateTime;
    }
    if (progressPercent != null) {
      _json['progressPercent'] = progressPercent;
    }
    if (startTime != null) {
      _json['startTime'] = startTime;
    }
    if (uri != null) {
      _json['uri'] = uri;
    }
    return _json;
  }
}

/// The top-level message sent by the client for the `LongRunningRecognize`
/// method.
class LongRunningRecognizeRequest {
  /// Required. The audio data to be recognized.
  RecognitionAudio audio;

  /// Required. Provides information to the recognizer that specifies how to
  /// process the request.
  RecognitionConfig config;

  LongRunningRecognizeRequest();

  LongRunningRecognizeRequest.fromJson(core.Map _json) {
    if (_json.containsKey('audio')) {
      audio = RecognitionAudio.fromJson(_json['audio']);
    }
    if (_json.containsKey('config')) {
      config = RecognitionConfig.fromJson(_json['config']);
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (audio != null) {
      _json['audio'] = audio.toJson();
    }
    if (config != null) {
      _json['config'] = config.toJson();
    }
    return _json;
  }
}

/// The only message returned to the client by the `LongRunningRecognize`
/// method. It contains the result as zero or more sequential
/// `SpeechRecognitionResult` messages. It is included in the `result.response`
/// field of the `Operation` returned by the `GetOperation` call of the
/// `google::longrunning::Operations` service.
class LongRunningRecognizeResponse {
  /// Sequential list of transcription results corresponding to sequential
  /// portions of audio.
  core.List<SpeechRecognitionResult> results;

  LongRunningRecognizeResponse();

  LongRunningRecognizeResponse.fromJson(core.Map _json) {
    if (_json.containsKey('results')) {
      results = (_json['results'] as core.List)
          .map<SpeechRecognitionResult>(
              (value) => SpeechRecognitionResult.fromJson(value))
          .toList();
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (results != null) {
      _json['results'] = results.map((value) => value.toJson()).toList();
    }
    return _json;
  }
}

/// This resource represents a long-running operation that is the result of a
/// network API call.
class Operation {
  /// If the value is `false`, it means the operation is still in progress. If
  /// `true`, the operation is completed, and either `error` or `response` is
  /// available.
  core.bool done;

  /// The error result of the operation in case of failure or cancellation.
  Status error;

  /// Service-specific metadata associated with the operation. It typically
  /// contains progress information and common metadata such as create time.
  /// Some services might not provide such metadata. Any method that returns a
  /// long-running operation should document the metadata type, if any.
  ///
  /// The values for Object must be JSON objects. It can consist of `num`,
  /// `String`, `bool` and `null` as well as `Map` and `List` values.
  core.Map<core.String, core.Object> metadata;

  /// The server-assigned name, which is only unique within the same service
  /// that originally returns it. If you use the default HTTP mapping, the
  /// `name` should be a resource name ending with `operations/{unique_id}`.
  core.String name;

  /// The normal response of the operation in case of success. If the original
  /// method returns no data on success, such as `Delete`, the response is
  /// `google.protobuf.Empty`. If the original method is standard
  /// `Get`/`Create`/`Update`, the response should be the resource. For other
  /// methods, the response should have the type `XxxResponse`, where `Xxx` is
  /// the original method name. For example, if the original method name is
  /// `TakeSnapshot()`, the inferred response type is `TakeSnapshotResponse`.
  ///
  /// The values for Object must be JSON objects. It can consist of `num`,
  /// `String`, `bool` and `null` as well as `Map` and `List` values.
  core.Map<core.String, core.Object> response;

  Operation();

  Operation.fromJson(core.Map _json) {
    if (_json.containsKey('done')) {
      done = _json['done'] as core.bool;
    }
    if (_json.containsKey('error')) {
      error = Status.fromJson(_json['error']);
    }
    if (_json.containsKey('metadata')) {
      metadata = commons.mapMap<core.Object, core.Object>(
          _json['metadata'].cast<core.String, core.Object>(),
          (core.Object item) => item as core.Object);
    }
    if (_json.containsKey('name')) {
      name = _json['name'] as core.String;
    }
    if (_json.containsKey('response')) {
      response = commons.mapMap<core.Object, core.Object>(
          _json['response'].cast<core.String, core.Object>(),
          (core.Object item) => item as core.Object);
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (done != null) {
      _json['done'] = done;
    }
    if (error != null) {
      _json['error'] = error.toJson();
    }
    if (metadata != null) {
      _json['metadata'] = metadata;
    }
    if (name != null) {
      _json['name'] = name;
    }
    if (response != null) {
      _json['response'] = response;
    }
    return _json;
  }
}

/// Contains audio data in the encoding specified in the `RecognitionConfig`.
/// Either `content` or `uri` must be supplied. Supplying both or neither
/// returns google.rpc.Code.INVALID_ARGUMENT. See [content
/// limits](https://cloud.google.com/speech-to-text/quotas#content).
class RecognitionAudio {
  /// The audio data bytes encoded as specified in `RecognitionConfig`. Note: as
  /// with all bytes fields, proto buffers use a pure binary representation,
  /// whereas JSON representations use base64.
  core.String content;
  core.List<core.int> get contentAsBytes => convert.base64.decode(content);

  set contentAsBytes(core.List<core.int> _bytes) {
    content =
        convert.base64.encode(_bytes).replaceAll('/', '_').replaceAll('+', '-');
  }

  /// URI that points to a file that contains audio data bytes as specified in
  /// `RecognitionConfig`. The file must not be compressed (for example, gzip).
  /// Currently, only Google Cloud Storage URIs are supported, which must be
  /// specified in the following format: `gs://bucket_name/object_name` (other
  /// URI formats return google.rpc.Code.INVALID_ARGUMENT). For more
  /// information, see [Request
  /// URIs](https://cloud.google.com/storage/docs/reference-uris).
  core.String uri;

  RecognitionAudio();

  RecognitionAudio.fromJson(core.Map _json) {
    if (_json.containsKey('content')) {
      content = _json['content'] as core.String;
    }
    if (_json.containsKey('uri')) {
      uri = _json['uri'] as core.String;
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (content != null) {
      _json['content'] = content;
    }
    if (uri != null) {
      _json['uri'] = uri;
    }
    return _json;
  }
}

/// Provides information to the recognizer that specifies how to process the
/// request.
class RecognitionConfig {
  /// The number of channels in the input audio data. ONLY set this for
  /// MULTI-CHANNEL recognition. Valid values for LINEAR16 and FLAC are `1`-`8`.
  /// Valid values for OGG_OPUS are '1'-'254'. Valid value for MULAW, AMR,
  /// AMR_WB and SPEEX_WITH_HEADER_BYTE is only `1`. If `0` or omitted, defaults
  /// to one channel (mono). Note: We only recognize the first channel by
  /// default. To perform independent recognition on each channel set
  /// `enable_separate_recognition_per_channel` to 'true'.
  core.int audioChannelCount;

  /// Config to enable speaker diarization and set additional parameters to make
  /// diarization better suited for your application. Note: When this is
  /// enabled, we send all the words from the beginning of the audio for the top
  /// alternative in every consecutive STREAMING responses. This is done in
  /// order to improve our speaker tags as our models learn to identify the
  /// speakers in the conversation over time. For non-streaming requests, the
  /// diarization results will be provided only in the top alternative of the
  /// FINAL SpeechRecognitionResult.
  SpeakerDiarizationConfig diarizationConfig;

  /// If 'true', adds punctuation to recognition result hypotheses. This feature
  /// is only available in select languages. Setting this for requests in other
  /// languages has no effect at all. The default 'false' value does not add
  /// punctuation to result hypotheses.
  core.bool enableAutomaticPunctuation;

  /// This needs to be set to `true` explicitly and `audio_channel_count` > 1 to
  /// get each channel recognized separately. The recognition result will
  /// contain a `channel_tag` field to state which channel that result belongs
  /// to. If this is not true, we will only recognize the first channel. The
  /// request is billed cumulatively for all channels recognized:
  /// `audio_channel_count` multiplied by the length of the audio.
  core.bool enableSeparateRecognitionPerChannel;

  /// If `true`, the top result includes a list of words and the start and end
  /// time offsets (timestamps) for those words. If `false`, no word-level time
  /// offset information is returned. The default is `false`.
  core.bool enableWordTimeOffsets;

  /// Encoding of audio data sent in all `RecognitionAudio` messages. This field
  /// is optional for `FLAC` and `WAV` audio files and required for all other
  /// audio formats. For details, see AudioEncoding.
  /// Possible string values are:
  /// - "ENCODING_UNSPECIFIED" : Not specified.
  /// - "LINEAR16" : Uncompressed 16-bit signed little-endian samples (Linear
  /// PCM).
  /// - "FLAC" : `FLAC` (Free Lossless Audio Codec) is the recommended encoding
  /// because it is lossless--therefore recognition is not compromised--and
  /// requires only about half the bandwidth of `LINEAR16`. `FLAC` stream
  /// encoding supports 16-bit and 24-bit samples, however, not all fields in
  /// `STREAMINFO` are supported.
  /// - "MULAW" : 8-bit samples that compand 14-bit audio samples using G.711
  /// PCMU/mu-law.
  /// - "AMR" : Adaptive Multi-Rate Narrowband codec. `sample_rate_hertz` must
  /// be 8000.
  /// - "AMR_WB" : Adaptive Multi-Rate Wideband codec. `sample_rate_hertz` must
  /// be 16000.
  /// - "OGG_OPUS" : Opus encoded audio frames in Ogg container
  /// ([OggOpus](https://wiki.xiph.org/OggOpus)). `sample_rate_hertz` must be
  /// one of 8000, 12000, 16000, 24000, or 48000.
  /// - "SPEEX_WITH_HEADER_BYTE" : Although the use of lossy encodings is not
  /// recommended, if a very low bitrate encoding is required, `OGG_OPUS` is
  /// highly preferred over Speex encoding. The [Speex](https://speex.org/)
  /// encoding supported by Cloud Speech API has a header byte in each block, as
  /// in MIME type `audio/x-speex-with-header-byte`. It is a variant of the RTP
  /// Speex encoding defined in [RFC 5574](https://tools.ietf.org/html/rfc5574).
  /// The stream is a sequence of blocks, one block per RTP packet. Each block
  /// starts with a byte containing the length of the block, in bytes, followed
  /// by one or more frames of Speex data, padded to an integral number of bytes
  /// (octets) as specified in RFC 5574. In other words, each RTP header is
  /// replaced with a single byte containing the block length. Only Speex
  /// wideband is supported. `sample_rate_hertz` must be 16000.
  core.String encoding;

  /// Required. The language of the supplied audio as a
  /// [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt) language tag.
  /// Example: "en-US". See [Language
  /// Support](https://cloud.google.com/speech-to-text/docs/languages) for a
  /// list of the currently supported language codes.
  core.String languageCode;

  /// Maximum number of recognition hypotheses to be returned. Specifically, the
  /// maximum number of `SpeechRecognitionAlternative` messages within each
  /// `SpeechRecognitionResult`. The server may return fewer than
  /// `max_alternatives`. Valid values are `0`-`30`. A value of `0` or `1` will
  /// return a maximum of one. If omitted, will return a maximum of one.
  core.int maxAlternatives;

  /// Metadata regarding this request.
  RecognitionMetadata metadata;

  /// Which model to select for the given request. Select the model best suited
  /// to your domain to get best results. If a model is not explicitly
  /// specified, then we auto-select a model based on the parameters in the
  /// RecognitionConfig. *Model* *Description* command_and_search Best for short
  /// queries such as voice commands or voice search. phone_call Best for audio
  /// that originated from a phone call (typically recorded at an 8khz sampling
  /// rate). video Best for audio that originated from from video or includes
  /// multiple speakers. Ideally the audio is recorded at a 16khz or greater
  /// sampling rate. This is a premium model that costs more than the standard
  /// rate. default Best for audio that is not one of the specific audio models.
  /// For example, long-form audio. Ideally the audio is high-fidelity, recorded
  /// at a 16khz or greater sampling rate.
  core.String model;

  /// If set to `true`, the server will attempt to filter out profanities,
  /// replacing all but the initial character in each filtered word with
  /// asterisks, e.g. "f***". If set to `false` or omitted, profanities won't be
  /// filtered out.
  core.bool profanityFilter;

  /// Sample rate in Hertz of the audio data sent in all `RecognitionAudio`
  /// messages. Valid values are: 8000-48000. 16000 is optimal. For best
  /// results, set the sampling rate of the audio source to 16000 Hz. If that's
  /// not possible, use the native sample rate of the audio source (instead of
  /// re-sampling). This field is optional for FLAC and WAV audio files, but is
  /// required for all other audio formats. For details, see AudioEncoding.
  core.int sampleRateHertz;

  /// Array of SpeechContext. A means to provide context to assist the speech
  /// recognition. For more information, see [speech
  /// adaptation](https://cloud.google.com/speech-to-text/docs/context-strength).
  core.List<SpeechContext> speechContexts;

  /// Set to true to use an enhanced model for speech recognition. If
  /// `use_enhanced` is set to true and the `model` field is not set, then an
  /// appropriate enhanced model is chosen if an enhanced model exists for the
  /// audio. If `use_enhanced` is true and an enhanced version of the specified
  /// model does not exist, then the speech is recognized using the standard
  /// version of the specified model.
  core.bool useEnhanced;

  RecognitionConfig();

  RecognitionConfig.fromJson(core.Map _json) {
    if (_json.containsKey('audioChannelCount')) {
      audioChannelCount = _json['audioChannelCount'] as core.int;
    }
    if (_json.containsKey('diarizationConfig')) {
      diarizationConfig =
          SpeakerDiarizationConfig.fromJson(_json['diarizationConfig']);
    }
    if (_json.containsKey('enableAutomaticPunctuation')) {
      enableAutomaticPunctuation =
          _json['enableAutomaticPunctuation'] as core.bool;
    }
    if (_json.containsKey('enableSeparateRecognitionPerChannel')) {
      enableSeparateRecognitionPerChannel =
          _json['enableSeparateRecognitionPerChannel'] as core.bool;
    }
    if (_json.containsKey('enableWordTimeOffsets')) {
      enableWordTimeOffsets = _json['enableWordTimeOffsets'] as core.bool;
    }
    if (_json.containsKey('encoding')) {
      encoding = _json['encoding'] as core.String;
    }
    if (_json.containsKey('languageCode')) {
      languageCode = _json['languageCode'] as core.String;
    }
    if (_json.containsKey('maxAlternatives')) {
      maxAlternatives = _json['maxAlternatives'] as core.int;
    }
    if (_json.containsKey('metadata')) {
      metadata = RecognitionMetadata.fromJson(_json['metadata']);
    }
    if (_json.containsKey('model')) {
      model = _json['model'] as core.String;
    }
    if (_json.containsKey('profanityFilter')) {
      profanityFilter = _json['profanityFilter'] as core.bool;
    }
    if (_json.containsKey('sampleRateHertz')) {
      sampleRateHertz = _json['sampleRateHertz'] as core.int;
    }
    if (_json.containsKey('speechContexts')) {
      speechContexts = (_json['speechContexts'] as core.List)
          .map<SpeechContext>((value) => SpeechContext.fromJson(value))
          .toList();
    }
    if (_json.containsKey('useEnhanced')) {
      useEnhanced = _json['useEnhanced'] as core.bool;
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (audioChannelCount != null) {
      _json['audioChannelCount'] = audioChannelCount;
    }
    if (diarizationConfig != null) {
      _json['diarizationConfig'] = diarizationConfig.toJson();
    }
    if (enableAutomaticPunctuation != null) {
      _json['enableAutomaticPunctuation'] = enableAutomaticPunctuation;
    }
    if (enableSeparateRecognitionPerChannel != null) {
      _json['enableSeparateRecognitionPerChannel'] =
          enableSeparateRecognitionPerChannel;
    }
    if (enableWordTimeOffsets != null) {
      _json['enableWordTimeOffsets'] = enableWordTimeOffsets;
    }
    if (encoding != null) {
      _json['encoding'] = encoding;
    }
    if (languageCode != null) {
      _json['languageCode'] = languageCode;
    }
    if (maxAlternatives != null) {
      _json['maxAlternatives'] = maxAlternatives;
    }
    if (metadata != null) {
      _json['metadata'] = metadata.toJson();
    }
    if (model != null) {
      _json['model'] = model;
    }
    if (profanityFilter != null) {
      _json['profanityFilter'] = profanityFilter;
    }
    if (sampleRateHertz != null) {
      _json['sampleRateHertz'] = sampleRateHertz;
    }
    if (speechContexts != null) {
      _json['speechContexts'] =
          speechContexts.map((value) => value.toJson()).toList();
    }
    if (useEnhanced != null) {
      _json['useEnhanced'] = useEnhanced;
    }
    return _json;
  }
}

/// Description of audio data to be recognized.
class RecognitionMetadata {
  /// Description of the content. Eg. "Recordings of federal supreme court
  /// hearings from 2012".
  core.String audioTopic;

  /// The industry vertical to which this speech recognition request most
  /// closely applies. This is most indicative of the topics contained in the
  /// audio. Use the 6-digit NAICS code to identify the industry vertical - see
  /// https://www.naics.com/search/.
  core.int industryNaicsCodeOfAudio;

  /// The use case most closely describing the audio content to be recognized.
  /// Possible string values are:
  /// - "INTERACTION_TYPE_UNSPECIFIED" : Use case is either unknown or is
  /// something other than one of the other values below.
  /// - "DISCUSSION" : Multiple people in a conversation or discussion. For
  /// example in a meeting with two or more people actively participating.
  /// Typically all the primary people speaking would be in the same room (if
  /// not, see PHONE_CALL)
  /// - "PRESENTATION" : One or more persons lecturing or presenting to others,
  /// mostly uninterrupted.
  /// - "PHONE_CALL" : A phone-call or video-conference in which two or more
  /// people, who are not in the same room, are actively participating.
  /// - "VOICEMAIL" : A recorded message intended for another person to listen
  /// to.
  /// - "PROFESSIONALLY_PRODUCED" : Professionally produced audio (eg. TV Show,
  /// Podcast).
  /// - "VOICE_SEARCH" : Transcribe spoken questions and queries into text.
  /// - "VOICE_COMMAND" : Transcribe voice commands, such as for controlling a
  /// device.
  /// - "DICTATION" : Transcribe speech to text to create a written document,
  /// such as a text-message, email or report.
  core.String interactionType;

  /// The audio type that most closely describes the audio being recognized.
  /// Possible string values are:
  /// - "MICROPHONE_DISTANCE_UNSPECIFIED" : Audio type is not known.
  /// - "NEARFIELD" : The audio was captured from a closely placed microphone.
  /// Eg. phone, dictaphone, or handheld microphone. Generally if there speaker
  /// is within 1 meter of the microphone.
  /// - "MIDFIELD" : The speaker if within 3 meters of the microphone.
  /// - "FARFIELD" : The speaker is more than 3 meters away from the microphone.
  core.String microphoneDistance;

  /// The original media the speech was recorded on.
  /// Possible string values are:
  /// - "ORIGINAL_MEDIA_TYPE_UNSPECIFIED" : Unknown original media type.
  /// - "AUDIO" : The speech data is an audio recording.
  /// - "VIDEO" : The speech data originally recorded on a video.
  core.String originalMediaType;

  /// Mime type of the original audio file. For example `audio/m4a`,
  /// `audio/x-alaw-basic`, `audio/mp3`, `audio/3gpp`. A list of possible audio
  /// mime types is maintained at
  /// http://www.iana.org/assignments/media-types/media-types.xhtml#audio
  core.String originalMimeType;

  /// The device used to make the recording. Examples 'Nexus 5X' or 'Polycom
  /// SoundStation IP 6000' or 'POTS' or 'VoIP' or 'Cardioid Microphone'.
  core.String recordingDeviceName;

  /// The type of device the speech was recorded with.
  /// Possible string values are:
  /// - "RECORDING_DEVICE_TYPE_UNSPECIFIED" : The recording device is unknown.
  /// - "SMARTPHONE" : Speech was recorded on a smartphone.
  /// - "PC" : Speech was recorded using a personal computer or tablet.
  /// - "PHONE_LINE" : Speech was recorded over a phone line.
  /// - "VEHICLE" : Speech was recorded in a vehicle.
  /// - "OTHER_OUTDOOR_DEVICE" : Speech was recorded outdoors.
  /// - "OTHER_INDOOR_DEVICE" : Speech was recorded indoors.
  core.String recordingDeviceType;

  RecognitionMetadata();

  RecognitionMetadata.fromJson(core.Map _json) {
    if (_json.containsKey('audioTopic')) {
      audioTopic = _json['audioTopic'] as core.String;
    }
    if (_json.containsKey('industryNaicsCodeOfAudio')) {
      industryNaicsCodeOfAudio = _json['industryNaicsCodeOfAudio'] as core.int;
    }
    if (_json.containsKey('interactionType')) {
      interactionType = _json['interactionType'] as core.String;
    }
    if (_json.containsKey('microphoneDistance')) {
      microphoneDistance = _json['microphoneDistance'] as core.String;
    }
    if (_json.containsKey('originalMediaType')) {
      originalMediaType = _json['originalMediaType'] as core.String;
    }
    if (_json.containsKey('originalMimeType')) {
      originalMimeType = _json['originalMimeType'] as core.String;
    }
    if (_json.containsKey('recordingDeviceName')) {
      recordingDeviceName = _json['recordingDeviceName'] as core.String;
    }
    if (_json.containsKey('recordingDeviceType')) {
      recordingDeviceType = _json['recordingDeviceType'] as core.String;
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (audioTopic != null) {
      _json['audioTopic'] = audioTopic;
    }
    if (industryNaicsCodeOfAudio != null) {
      _json['industryNaicsCodeOfAudio'] = industryNaicsCodeOfAudio;
    }
    if (interactionType != null) {
      _json['interactionType'] = interactionType;
    }
    if (microphoneDistance != null) {
      _json['microphoneDistance'] = microphoneDistance;
    }
    if (originalMediaType != null) {
      _json['originalMediaType'] = originalMediaType;
    }
    if (originalMimeType != null) {
      _json['originalMimeType'] = originalMimeType;
    }
    if (recordingDeviceName != null) {
      _json['recordingDeviceName'] = recordingDeviceName;
    }
    if (recordingDeviceType != null) {
      _json['recordingDeviceType'] = recordingDeviceType;
    }
    return _json;
  }
}

/// The top-level message sent by the client for the `Recognize` method.
class RecognizeRequest {
  /// Required. The audio data to be recognized.
  RecognitionAudio audio;

  /// Required. Provides information to the recognizer that specifies how to
  /// process the request.
  RecognitionConfig config;

  RecognizeRequest();

  RecognizeRequest.fromJson(core.Map _json) {
    if (_json.containsKey('audio')) {
      audio = RecognitionAudio.fromJson(_json['audio']);
    }
    if (_json.containsKey('config')) {
      config = RecognitionConfig.fromJson(_json['config']);
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (audio != null) {
      _json['audio'] = audio.toJson();
    }
    if (config != null) {
      _json['config'] = config.toJson();
    }
    return _json;
  }
}

/// The only message returned to the client by the `Recognize` method. It
/// contains the result as zero or more sequential `SpeechRecognitionResult`
/// messages.
class RecognizeResponse {
  /// Sequential list of transcription results corresponding to sequential
  /// portions of audio.
  core.List<SpeechRecognitionResult> results;

  RecognizeResponse();

  RecognizeResponse.fromJson(core.Map _json) {
    if (_json.containsKey('results')) {
      results = (_json['results'] as core.List)
          .map<SpeechRecognitionResult>(
              (value) => SpeechRecognitionResult.fromJson(value))
          .toList();
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (results != null) {
      _json['results'] = results.map((value) => value.toJson()).toList();
    }
    return _json;
  }
}

/// Config to enable speaker diarization.
class SpeakerDiarizationConfig {
  /// If 'true', enables speaker detection for each recognized word in the top
  /// alternative of the recognition result using a speaker_tag provided in the
  /// WordInfo.
  core.bool enableSpeakerDiarization;

  /// Maximum number of speakers in the conversation. This range gives you more
  /// flexibility by allowing the system to automatically determine the correct
  /// number of speakers. If not set, the default value is 6.
  core.int maxSpeakerCount;

  /// Minimum number of speakers in the conversation. This range gives you more
  /// flexibility by allowing the system to automatically determine the correct
  /// number of speakers. If not set, the default value is 2.
  core.int minSpeakerCount;

  /// Output only. Unused.
  core.int speakerTag;

  SpeakerDiarizationConfig();

  SpeakerDiarizationConfig.fromJson(core.Map _json) {
    if (_json.containsKey('enableSpeakerDiarization')) {
      enableSpeakerDiarization = _json['enableSpeakerDiarization'] as core.bool;
    }
    if (_json.containsKey('maxSpeakerCount')) {
      maxSpeakerCount = _json['maxSpeakerCount'] as core.int;
    }
    if (_json.containsKey('minSpeakerCount')) {
      minSpeakerCount = _json['minSpeakerCount'] as core.int;
    }
    if (_json.containsKey('speakerTag')) {
      speakerTag = _json['speakerTag'] as core.int;
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (enableSpeakerDiarization != null) {
      _json['enableSpeakerDiarization'] = enableSpeakerDiarization;
    }
    if (maxSpeakerCount != null) {
      _json['maxSpeakerCount'] = maxSpeakerCount;
    }
    if (minSpeakerCount != null) {
      _json['minSpeakerCount'] = minSpeakerCount;
    }
    if (speakerTag != null) {
      _json['speakerTag'] = speakerTag;
    }
    return _json;
  }
}

/// Provides "hints" to the speech recognizer to favor specific words and
/// phrases in the results.
class SpeechContext {
  /// A list of strings containing words and phrases "hints" so that the speech
  /// recognition is more likely to recognize them. This can be used to improve
  /// the accuracy for specific words and phrases, for example, if specific
  /// commands are typically spoken by the user. This can also be used to add
  /// additional words to the vocabulary of the recognizer. See [usage
  /// limits](https://cloud.google.com/speech-to-text/quotas#content). List
  /// items can also be set to classes for groups of words that represent common
  /// concepts that occur in natural language. For example, rather than
  /// providing phrase hints for every month of the year, using the $MONTH class
  /// improves the likelihood of correctly transcribing audio that includes
  /// months.
  core.List<core.String> phrases;

  SpeechContext();

  SpeechContext.fromJson(core.Map _json) {
    if (_json.containsKey('phrases')) {
      phrases = (_json['phrases'] as core.List)
          .map<core.String>((value) => value as core.String)
          .toList();
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (phrases != null) {
      _json['phrases'] = phrases;
    }
    return _json;
  }
}

/// Alternative hypotheses (a.k.a. n-best list).
class SpeechRecognitionAlternative {
  /// The confidence estimate between 0.0 and 1.0. A higher number indicates an
  /// estimated greater likelihood that the recognized words are correct. This
  /// field is set only for the top alternative of a non-streaming result or, of
  /// a streaming result where `is_final=true`. This field is not guaranteed to
  /// be accurate and users should not rely on it to be always provided. The
  /// default of 0.0 is a sentinel value indicating `confidence` was not set.
  core.double confidence;

  /// Transcript text representing the words that the user spoke.
  core.String transcript;

  /// A list of word-specific information for each recognized word. Note: When
  /// `enable_speaker_diarization` is true, you will see all the words from the
  /// beginning of the audio.
  core.List<WordInfo> words;

  SpeechRecognitionAlternative();

  SpeechRecognitionAlternative.fromJson(core.Map _json) {
    if (_json.containsKey('confidence')) {
      confidence = (_json['confidence'] as core.num).toDouble();
    }
    if (_json.containsKey('transcript')) {
      transcript = _json['transcript'] as core.String;
    }
    if (_json.containsKey('words')) {
      words = (_json['words'] as core.List)
          .map<WordInfo>((value) => WordInfo.fromJson(value))
          .toList();
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (confidence != null) {
      _json['confidence'] = confidence;
    }
    if (transcript != null) {
      _json['transcript'] = transcript;
    }
    if (words != null) {
      _json['words'] = words.map((value) => value.toJson()).toList();
    }
    return _json;
  }
}

/// A speech recognition result corresponding to a portion of the audio.
class SpeechRecognitionResult {
  /// May contain one or more recognition hypotheses (up to the maximum
  /// specified in `max_alternatives`). These alternatives are ordered in terms
  /// of accuracy, with the top (first) alternative being the most probable, as
  /// ranked by the recognizer.
  core.List<SpeechRecognitionAlternative> alternatives;

  /// For multi-channel audio, this is the channel number corresponding to the
  /// recognized result for the audio from that channel. For audio_channel_count
  /// = N, its output values can range from '1' to 'N'.
  core.int channelTag;

  SpeechRecognitionResult();

  SpeechRecognitionResult.fromJson(core.Map _json) {
    if (_json.containsKey('alternatives')) {
      alternatives = (_json['alternatives'] as core.List)
          .map<SpeechRecognitionAlternative>(
              (value) => SpeechRecognitionAlternative.fromJson(value))
          .toList();
    }
    if (_json.containsKey('channelTag')) {
      channelTag = _json['channelTag'] as core.int;
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (alternatives != null) {
      _json['alternatives'] =
          alternatives.map((value) => value.toJson()).toList();
    }
    if (channelTag != null) {
      _json['channelTag'] = channelTag;
    }
    return _json;
  }
}

/// The `Status` type defines a logical error model that is suitable for
/// different programming environments, including REST APIs and RPC APIs. It is
/// used by [gRPC](https://github.com/grpc). Each `Status` message contains
/// three pieces of data: error code, error message, and error details. You can
/// find out more about this error model and how to work with it in the [API
/// Design Guide](https://cloud.google.com/apis/design/errors).
class Status {
  /// The status code, which should be an enum value of google.rpc.Code.
  core.int code;

  /// A list of messages that carry the error details. There is a common set of
  /// message types for APIs to use.
  ///
  /// The values for Object must be JSON objects. It can consist of `num`,
  /// `String`, `bool` and `null` as well as `Map` and `List` values.
  core.List<core.Map<core.String, core.Object>> details;

  /// A developer-facing error message, which should be in English. Any
  /// user-facing error message should be localized and sent in the
  /// google.rpc.Status.details field, or localized by the client.
  core.String message;

  Status();

  Status.fromJson(core.Map _json) {
    if (_json.containsKey('code')) {
      code = _json['code'] as core.int;
    }
    if (_json.containsKey('details')) {
      details = (_json['details'] as core.List)
          .map<core.Map<core.String, core.Object>>((value) =>
              commons.mapMap<core.Object, core.Object>(
                  value.cast<core.String, core.Object>(),
                  (core.Object item) => item as core.Object))
          .toList();
    }
    if (_json.containsKey('message')) {
      message = _json['message'] as core.String;
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (code != null) {
      _json['code'] = code;
    }
    if (details != null) {
      _json['details'] = details;
    }
    if (message != null) {
      _json['message'] = message;
    }
    return _json;
  }
}

/// Word-specific information for recognized words.
class WordInfo {
  /// Time offset relative to the beginning of the audio, and corresponding to
  /// the end of the spoken word. This field is only set if
  /// `enable_word_time_offsets=true` and only in the top hypothesis. This is an
  /// experimental feature and the accuracy of the time offset can vary.
  core.String endTime;

  /// Output only. A distinct integer value is assigned for every speaker within
  /// the audio. This field specifies which one of those speakers was detected
  /// to have spoken this word. Value ranges from '1' to
  /// diarization_speaker_count. speaker_tag is set if
  /// enable_speaker_diarization = 'true' and only in the top alternative.
  core.int speakerTag;

  /// Time offset relative to the beginning of the audio, and corresponding to
  /// the start of the spoken word. This field is only set if
  /// `enable_word_time_offsets=true` and only in the top hypothesis. This is an
  /// experimental feature and the accuracy of the time offset can vary.
  core.String startTime;

  /// The word corresponding to this set of information.
  core.String word;

  WordInfo();

  WordInfo.fromJson(core.Map _json) {
    if (_json.containsKey('endTime')) {
      endTime = _json['endTime'] as core.String;
    }
    if (_json.containsKey('speakerTag')) {
      speakerTag = _json['speakerTag'] as core.int;
    }
    if (_json.containsKey('startTime')) {
      startTime = _json['startTime'] as core.String;
    }
    if (_json.containsKey('word')) {
      word = _json['word'] as core.String;
    }
  }

  core.Map<core.String, core.Object> toJson() {
    final _json = <core.String, core.Object>{};
    if (endTime != null) {
      _json['endTime'] = endTime;
    }
    if (speakerTag != null) {
      _json['speakerTag'] = speakerTag;
    }
    if (startTime != null) {
      _json['startTime'] = startTime;
    }
    if (word != null) {
      _json['word'] = word;
    }
    return _json;
  }
}