return root
	}
	flat := d.flatten(*root)
	if flat.ReplicationStats.empty() {
		flat.ReplicationStats = nil
	}
	return &flat
}

// totalChildrenRec returns the total number of children recorded.
func (d *dataUsageCache) totalChildrenRec(path string) int {
	root := d.find(path)
	if root == nil || len(root.Children) == 0 {
		return 0
	}
	n := len(root.Children)
	for ch := range root.Children {