code: function WriteResponse(properties) {
                      this.writeResults = [];
                      if (properties)
                          for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
                              if (properties[keys[i]] != null)
                                  this[keys[i]] = properties[keys[i]];
                  }
docs: Properties of a WriteResponse.
  @memberof google.firestore.v1
  @interface IWriteResponse
  @property {string|null} [streamId] WriteResponse streamId
  @property {Uint8Array|null} [streamToken] WriteResponse streamToken
  @property {Array.<google.firestore.v1.IWriteResult>|null} [writeResults] WriteResponse writeResults
  @property {google.protobuf.ITimestamp|null} [commitTime] WriteResponse commitTime
   
  Constructs a new WriteResponse.
  @memberof google.firestore.v1
  @classdesc Represents a WriteResponse.
  @implements IWriteResponse
  @constructor
  @param {google.firestore.v1.IWriteResponse=} [properties] Properties to set