code: function WriteResult(properties) {
                      this.transformResults = [];
                      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 WriteResult.
  @memberof google.firestore.v1
  @interface IWriteResult
  @property {google.protobuf.ITimestamp|null} [updateTime] WriteResult updateTime
  @property {Array.<google.firestore.v1.IValue>|null} [transformResults] WriteResult transformResults
   
  Constructs a new WriteResult.
  @memberof google.firestore.v1
  @classdesc Represents a WriteResult.
  @implements IWriteResult
  @constructor
  @param {google.firestore.v1.IWriteResult=} [properties] Properties to set