code: func (m *podContainerManagerImpl) IsPodCgroup(cgroupfs string) (bool, types.UID) {
  	// convert the literal cgroupfs form to the driver specific value
  	cgroupName := m.cgroupManager.CgroupName(cgroupfs)
  	qosContainersList := [3]CgroupName{m.qosContainersInfo.BestEffort, m.qosContainersInfo.Burstable, m.qosContainersInfo.Guaranteed}
  	basePath := ""
  	for _, qosContainerName := range qosContainersList {
  		// a pod cgroup is a direct child of a qos node, so check if its a match
  		if len(cgroupName) == len(qosContainerName)+1 {
  			basePath = cgroupName[len(qosContainerName)]
  		}
  	}
  	if basePath == "" {
  		return false, types.UID("")
  	}
  	if !strings.HasPrefix(basePath, podCgroupNamePrefix) {
  		return false, types.UID("")
  	}
  	parts := strings.Split(basePath, podCgroupNamePrefix)
  	if len(parts) != 2 {
  		return false, types.UID("")
  	}
  	return true, types.UID(parts[1])
  }
docs: // IsPodCgroup returns true if the literal cgroupfs name corresponds to a pod