}
	return n
}

// root returns the root of the cache.
func (d *dataUsageCache) root() *dataUsageEntry {
	return d.find(d.Info.Name)
}

// rootHash returns the root of the cache.
func (d *dataUsageCache) rootHash() dataUsageHash {
	return hashPath(d.Info.Name)
}

// clone returns a copy of the cache with no references to the existing.
func (d *dataUsageCache) clone() dataUsageCache {