github.com/jbunds/progress/unique.go

func (u *uniqueTracker) init() {

	u.status.Store(unique.Make(""))
	u.lo = defaultLayout()
}

func (u *uniqueTracker) store(_ uint64, status string) { u.status.Store(unique.Make(status)) }

func (u *uniqueTracker) load() string {

	if status, ok := u.status.Load().(unique.Handle[string]); ok { return status.Value() }
	return ""
}

func (u *uniqueTracker) layout() layout { return u.lo }

func (u *uniqueTracker) setLayout(lo *layout) { u.lo = *lo }

func (u *uniqueTracker) Equal(other *uniqueTracker) bool { // work around cmp's draconian strictures

	if u == nil || other == nil { return u == other }
	return u.load()              == other.load()              &&
	       u.lo.staticWidth      == other.lo.staticWidth      &&
	       u.lo.colorBlockFactor == other.lo.colorBlockFactor &&
	       u.lo.prefix           == other.lo.prefix           &&
	       u.lo.suffix           == other.lo.suffix           &&
	       u.lo.clearSeq         == other.lo.clearSeq         &&
	       u.lo.doneSeq          == other.lo.doneSeq          &&
	       u.lo.lineTerminator   == other.lo.lineTerminator   &&
	       u.lo.finalStatus      == other.lo.finalStatus
}