Refers current message and replys a new message

        Args:
            text(str): message content

        Returns:
            RTMMessage

def refer(self, text):
        """Refers current message and replys a new message

        Args:
            text(str): message content

        Returns:
            RTMMessage
        """
        data = self.reply(text)
        data['refer_key'] = self['key']
        return data