def ssh_DEBUG(self, packet):
        """
        Called when we receive a MSG_DEBUG message.  Payload::
            bool alwaysDisplay
            string message
            string language

        This means the other side has passed along some debugging info.

        @type packet: L{bytes}
        @param packet: The message data.
        """
        alwaysDisplay = bool(ord(packet[0:1]))
        message, lang, foo = getNS(packet[1:], 2)
        self.receiveDebug(alwaysDisplay, message, lang)

        Called when we receive a MSG_DEBUG message.  Payload::
            bool alwaysDisplay
            string message
            string language

        This means the other side has passed along some debugging info.

        @type packet: L{bytes}
        @param packet: The message data.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/conch/ssh/transport.py