code: function VehiclePosition(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 VehiclePosition.
  @memberof transit_realtime
  @interface IVehiclePosition
  @property {transit_realtime.ITripDescriptor|null} [trip] VehiclePosition trip
  @property {transit_realtime.IVehicleDescriptor|null} [vehicle] VehiclePosition vehicle
  @property {transit_realtime.IPosition|null} [position] VehiclePosition position
  @property {number|null} [currentStopSequence] VehiclePosition currentStopSequence
  @property {string|null} [stopId] VehiclePosition stopId
  @property {transit_realtime.VehiclePosition.VehicleStopStatus|null} [currentStatus] VehiclePosition currentStatus
  @property {number|Long|null} [timestamp] VehiclePosition timestamp
  @property {transit_realtime.VehiclePosition.CongestionLevel|null} [congestionLevel] VehiclePosition congestionLevel
  @property {transit_realtime.VehiclePosition.OccupancyStatus|null} [occupancyStatus] VehiclePosition occupancyStatus
   
  Constructs a new VehiclePosition.
  @memberof transit_realtime
  @classdesc Represents a VehiclePosition.
  @implements IVehiclePosition
  @constructor
  @param {transit_realtime.IVehiclePosition=} [properties] Properties to set