code: def reply_inform(self, connection, inform, orig_req):
          
          if isinstance(connection, ClientRequestConnection):
              self._logger.warn(
                  'Deprecation warning: do not use self.reply_inform() '
                  'within a reply handler context -- '
                  'use req.inform(*inform_arguments)\n'
                  'Traceback:\n %s', "".join(traceback.format_stack()))
              # Get the underlying ClientConnection instance
              connection = connection.client_connection
          connection.reply_inform(inform, orig_req)
docs: Send an inform as part of the reply to an earlier request.
  
          Parameters
          ----------
          connection : ClientConnection object
              The client to send the inform to.
          inform : Message object
              The inform message to send.
          orig_req : Message object
              The request message being replied to. The inform message's
              id is overridden with the id from orig_req before the
              inform is sent.