def disableLocal(self, option):
        """
        Signal a programming error by raising an exception.

        L{enableLocal} must return true for the given value of C{option} in
        order for this method to be called.  If a subclass of L{Telnet}
        overrides enableLocal to allow certain options to be enabled, it must
        also override disableLocal to disable those options.

        @raise NotImplementedError: Always raised.
        """
        raise NotImplementedError(
            "Don't know how to disable local telnet option %r" % (option,))

        Signal a programming error by raising an exception.

        L{enableLocal} must return true for the given value of C{option} in
        order for this method to be called.  If a subclass of L{Telnet}
        overrides enableLocal to allow certain options to be enabled, it must
        also override disableLocal to disable those options.

        @raise NotImplementedError: Always raised.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/conch/telnet.py