code: def kill(self, signal=None):
          
          self.d.kill(self.get_id(), signal=signal)
docs: send a signal to this container (bear in mind that the process won't have time
          to shutdown properly and your service may end up in an inconsistent state)
  
          :param signal: str or int, signal to use for killing the container (SIGKILL by default)
          :return: None