Get the underlying C message from this object.

        :rtype: uamqp.c_uamqp.cMessage

def get_message(self):
        """Get the underlying C message from this object.

        :rtype: uamqp.c_uamqp.cMessage
        """
        if not self._message:
            return None
        self._populate_message_attributes(self._message)
        return self._message