func NewUnordered(root string) *Unordered {
	return &Unordered{
		fs:   make(map[string]*NodeProto),
		root: clean(root),
	}
}
func NewUnordered(root string) *Unordered {
	return &Unordered{
		fs:   make(map[string]*NodeProto),
		root: clean(root),
	}
}
// NewUnordered creates a new unordered hashtree.