agent/taskresource/volume/volumestatus.go
func (vs VolumeStatus) String() string {
	for k, v := range resourceStatusMap {
		if v == vs {
			return k
		}
	}
	return "NONE"
}
func (vs VolumeStatus) String() string {
	for k, v := range resourceStatusMap {
		if v == vs {
			return k
		}
	}
	return "NONE"
}
// StatusString returns a human readable string representation of this object