docs: def _pop_states(self, msg_id):
          """
          Pops the states known to match the given ID from pending messages.
  
          This method should be used when the response isn't specific.
          """
          state = self._pending_state.pop(msg_id, None)
          if state:
              return [state]
  
          to_pop = []
          for state in self._pending_state.values():
              if state.container_id == msg_id:
                  to_pop.append(state.msg_id)
  
          if to_pop:
              return [self._pending_state.pop(x) for x in to_pop]
  
          for ack in self._last_acks:
              if ack.msg_id == msg_id:
                  return [ack]
  
          return []