code: def shutdown(self):
          '''Call the dbus proxy to start the shutdown.'''
          if self._proxy:
              os.sync()
              self._proxy(*self._argsf shutdown(self):
          '''Call the dbus proxy to start the shutdown.'''
          if self._proxy:
              os.sync()
              self._proxy(*self._args)
docs: Call the dbus proxy to start the shutdown.