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