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