def stop():
        """
        Fire 'shutdown' System Events, which will move the reactor to the
        'stopped' state and cause C{reactor.run()} to exit.
        """

        Fire 'shutdown' System Events, which will move the reactor to the
        'stopped' state and cause C{reactor.run()} to exit.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/interfaces.py