code: func (kl *Kubelet) getPodPluginsDir(podUID types.UID) string {
  	return filepath.Join(kl.getPodDir(podUID), config.DefaultKubeletPluginsDirName)
  }
docs: // getPodPluginsDir returns the full path to the per-pod data directory under
  // which plugins may store data for the specified pod.  This directory may not
  // exist if the pod does not exist.