code: def stop(self):
          
          for client in self._snippet_clients.values():
              if client.is_alive:
                  self._device.log.debug('Stopping SnippetClient<%s>.',
                                         client.package)
                  client.stop_app()
              else:
                  self._device.log.debug(
                      'Not stopping SnippetClient<%s> because it is not alive.',
                      client.package)
docs: Stops all the snippet clients under management.