code: function DoubleValue(properties) {
                  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 DoubleValue.
  @memberof google.protobuf
  @interface IDoubleValue
  @property {number|null} [value] DoubleValue value
   
  Constructs a new DoubleValue.
  @memberof google.protobuf
  @classdesc Represents a DoubleValue.
  @implements IDoubleValue
  @constructor
  @param {google.protobuf.IDoubleValue=} [properties] Properties to set