presto-orc/src/main/java/io/prestosql/orc/OrcRecordReader.java/OrcRecordReader/getRetainedSizeInBytes
class OrcRecordReader:    @VisibleForTesting
    long getRetainedSizeInBytes()
    {
        return INSTANCE_SIZE + getStreamReaderRetainedSizeInBytes() + getCurrentStripeRetainedSizeInBytes();
    }