code: func (kl *Kubelet) listPodsFromDisk() ([]types.UID, error) {
  	podInfos, err := ioutil.ReadDir(kl.getPodsDir())
  	if err != nil {
  		return nil, err
  	}
  	pods := []types.UID{}
  	for i := range podInfos {
  		if podInfos[i].IsDir() {
  			pods = append(pods, types.UID(podInfos[i].Name()))
  		}
  	}
  	return pods, nil
  }
docs: // Get a list of pods that have data directories.