code: function TripUpdate(properties) {
              this.stopTimeUpdate = [];
              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 TripUpdate.
  @memberof transit_realtime
  @interface ITripUpdate
  @property {transit_realtime.ITripDescriptor} trip TripUpdate trip
  @property {transit_realtime.IVehicleDescriptor|null} [vehicle] TripUpdate vehicle
  @property {Array.<transit_realtime.TripUpdate.IStopTimeUpdate>|null} [stopTimeUpdate] TripUpdate stopTimeUpdate
  @property {number|Long|null} [timestamp] TripUpdate timestamp
  @property {number|null} [delay] TripUpdate delay
   
  Constructs a new TripUpdate.
  @memberof transit_realtime
  @classdesc Represents a TripUpdate.
  @implements ITripUpdate
  @constructor
  @param {transit_realtime.ITripUpdate=} [properties] Properties to set