docs: def setEmergencyDecel(self, vehID, decel):
          """setEmergencyDecel(string, double) -> None
  
          Sets the maximal physically possible deceleration in m/s^2 for this vehicle.
          """
          self._connection._sendDoubleCmd(
              tc.CMD_SET_VEHICLE_VARIABLE, tc.VAR_EMERGENCY_DECEL, vehID, decel)