presto-spi/src/main/java/io/prestosql/spi/block/Int128ArrayBlockBuilder.java/Int128ArrayBlockBuilder/writePositionTo
class Int128ArrayBlockBuilder:    @Override
    public void writePositionTo(int position, BlockBuilder blockBuilder)
    {
        checkReadablePosition(position);
        blockBuilder.writeLong(values[position * 2]);
        blockBuilder.writeLong(values[(position * 2) + 1]);
        blockBuilder.closeEntry();
    }