code: func (ds *dockerService) Start() error {
  	ds.initCleanup()
  
  	// Initialize the legacy cleanup flag.
  	if ds.startLocalStreamingServer {
  		go func() {
  			if err := ds.streamingServer.Start(true); err != nil {
  				klog.Fatalf("Streaming server stopped unexpectedly: %v", err)
  			}
  		}()
  	}
  	return ds.containerManager.Start()
  }
docs: // Start initializes and starts components in dockerService.