code: def start(self):
          
          for client in self._snippet_clients.values():
              if not client.is_alive:
                  self._device.log.debug('Starting SnippetClient<%s>.',
                                         client.package)
                  client.start_app_and_connect()
              else:
                  self._device.log.debug(
                      'Not startng SnippetClient<%s> because it is already alive.',
                      client.package)
docs: Starts all the snippet clients under management.