def _drop_powerup(self, index: int, poweruptype: str = None) -> None:
if poweruptype is None:
poweruptype = (PowerupBoxFactory.get().get_random_powerup_type(
excludetypes=self._excludepowerups))
PowerupBox(position=self.map.powerup_spawn_points[index],
poweruptype=poweruptype).autoretain()