presto-spi/src/main/java/io/prestosql/spi/block/Int128ArrayBlockBuilder.java/Int128ArrayBlockBuilder/getSingleValueBlock
class Int128ArrayBlockBuilder:    @Override
    public Block getSingleValueBlock(int position)
    {
        checkReadablePosition(position);
        return new Int128ArrayBlock(
                0,
                1,
                valueIsNull[position] ? new boolean[] {true} : null,
                new long[] {
                        values[position * 2],
                        values[(position * 2) + 1]});
    }