if _, ok := volumes[name]; ok {
		return true
	}
	return false
}

// isMatched checks whether the volume with the given name is used by a
// container and if so, if it involves a PVC.
func isMatchedDevice(name string, volumes map[string]core.VolumeSource) (isMatched bool, isPVC bool) {
	if source, ok := volumes[name]; ok {
		if source.PersistentVolumeClaim != nil ||
			source.Ephemeral != nil {