def unsubscribe(self):
        """Unregister this object as a listener on the bus."""
        for channel in self.bus.listeners:
            # Unsubscribe self.start, self.exit, etc. if present.
            method = getattr(self, channel, None)
            if method is not None:
                self.bus.unsubscribe(channel, method)
Unregister this object as a listener on the bus.
cherrypy/process/plugins.py