presto-spi/src/main/java/io/prestosql/spi/block/RunLengthEncodedBlock.java/RunLengthEncodedBlock/hash
class RunLengthEncodedBlock:    @Override
    public long hash(int position, int offset, int length)
    {
        checkReadablePosition(position);
        return value.hash(0, offset, length);
    }