pod, ok := obj.(*v1.Pod)
		if !ok {
			continue
		}
		pods = append(pods, pod)
	}
	return pods, err
}

// isVolumeUsed returns list of active pods that use given PV.
func (ctrl *PersistentVolumeController) isVolumeUsed(pv *v1.PersistentVolume) ([]string, bool, error) {
	if pv.Spec.ClaimRef == nil {
		return nil, false, nil
	}
	podNames := sets.NewString()