docs: def leave_room(self, sid, room, namespace=None):
          """Leave a room.
  
          The only difference with the :func:`socketio.Server.leave_room` method
          is that when the ``namespace`` argument is not given the namespace
          associated with the class is used.
          """
          return self.server.leave_room(sid, room,
                                        namespace=namespace or self.namespace)