text: public long ramBytesUsed() {return super.ramBytesUsed()+ offsets.ramBytesUsed()+ lengths.ramBytesUsed()+ RamUsageEstimator.NUM_BYTES_OBJECT_HEADER+ 2 * Integer.BYTES+ 3 * RamUsageEstimator.NUM_BYTES_OBJECT_REF+ values.bytes().length;}