package storage import ( "strconv" ) type VolumeId uint32 func NewVolumeId(vid string) (VolumeId,error) { volumeId, err := strconv.ParseUint(vid, 10, 64) return VolumeId(volumeId), err } func (vid *VolumeId) String() string{ return strconv.FormatUint(uint64(*vid), 10) }