public long ramBytesUsed() {return values.ramBytesUsed()+ super.ramBytesUsed()+ Long.BYTES+ RamUsageEstimator.NUM_BYTES_OBJECT_REF;}
public long RamBytesUsed(){return RamUsageEstimator.AlignObjectSize(3 * RamUsageEstimator.NUM_BYTES_OBJECT_REF) + docIDs.RamBytesUsed() + offsets.RamBytesUsed();}