code: def request_raw_reverse(self, req, msg):
          
          # msg is a katcp.Message.request object
          reversed_args = msg.arguments[::-1]
          # req.make_reply() makes a katcp.Message.reply using the correct request
          # name and message ID
          return req.make_reply(*reversed_args)
docs: A raw request handler to demonstrate the calling convention if
          @request decoraters are not used. Reverses the message arguments.