code: func (ds *dockerService) getNetworkReady(podSandboxID string) (bool, bool) {
  	ds.networkReadyLock.Lock()
  	defer ds.networkReadyLock.Unlock()
  	ready, ok := ds.networkReady[podSandboxID]
  	return ready, ok
  }
docs: // Returns whether the sandbox network is ready, and whether the sandbox is known