Units inside a Bunker, CommandCenter, Nydus, Medivac, WarpPrism, Overlord

def passengers(self) -> Set["PassengerUnit"]:
        """ Units inside a Bunker, CommandCenter, Nydus, Medivac, WarpPrism, Overlord """
        return {PassengerUnit(unit, self._game_data) for unit in self._proto.passengers}