ReplicaSize            uint64
	Objects                uint64
	ObjSizes               sizeHistogram
	Children               dataUsageHashMap
}

//msgp:tuple dataUsageEntryV4
type dataUsageEntryV4 struct {
	Children dataUsageHashMap
	// These fields do no include any children.
	Size             int64
	Objects          uint64
	ObjSizes         sizeHistogram
	ReplicationStats replicationStatsV1
}