ObjectsTotalSize:        uint64(flat.Size),
		BucketsCount:            uint64(len(e.Children)),
		BucketsUsage:            d.bucketsUsageInfo(buckets),
		TierStats:               d.tiersUsageInfo(buckets),
	}
	return dui
}

// replace will add or replace an entry in the cache.
// If a parent is specified it will be added to that if not already there.