code: def send_and_wait(self, message, params=None, timeout=10, raises=False):
          
          job_id = self.send(message, params)
          resp = self.wait_event(job_id, timeout, raises=raises)
          return (None, None) if resp is None else resp
docs: Send service method request and wait for response
  
          :param message:
              proto message instance (use :meth:`SteamUnifiedMessages.get`)
              or method name (e.g. ``Player.GetGameBadgeLevels#1``)
          :type message: :class:`str`, proto message instance
          :param params: message parameters
          :type params: :class:`dict`
          :param timeout: (optional) seconds to wait
          :type timeout: :class:`int`
          :param raises: (optional) On timeout if :class:`False` return :class:`None`, else raise :class:`gevent.Timeout`
          :type raises: :class:`bool`
          :return: response proto message instance
          :rtype: (proto message, :class:`.UnifiedMessageError`)
          :raises: :class:`gevent.Timeout`