def receiveDebug(self, alwaysDisplay, message, lang):
        """
        Called when we receive a debug message from the other side.

        @param alwaysDisplay: if True, this message should always be
                              displayed.
        @type alwaysDisplay: L{bool}
        @param message: the debug message
        @type message: L{str}
        @param lang: optionally the language the message is in.
        @type lang: L{str}
        """
        if alwaysDisplay:
            log.msg('Remote Debug Message: %s' % (message,))

        Called when we receive a debug message from the other side.

        @param alwaysDisplay: if True, this message should always be
                              displayed.
        @type alwaysDisplay: L{bool}
        @param message: the debug message
        @type message: L{str}
        @param lang: optionally the language the message is in.
        @type lang: L{str}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/conch/ssh/transport.py