Forward message to this peer.
        :param message: Message to forward to peer.
        :param on_success: Callback to call when call is complete.
        :return:

def forward_message(self, message: Message=None, on_success: callable=None):
        """
        Forward message to this peer.
        :param message: Message to forward to peer.
        :param on_success: Callback to call when call is complete.
        :return:
        """
        self.twx.forward_message(self, message, on_success=on_success)