presto-spi/src/main/java/io/prestosql/spi/block/AbstractSingleRowBlock.java/AbstractSingleRowBlock/writeBytesTo
class AbstractSingleRowBlock:    @Override
    public void writeBytesTo(int position, int offset, int length, BlockBuilder blockBuilder)
    {
        checkFieldIndex(position);
        getRawFieldBlock(position).writeBytesTo(rowIndex, offset, length, blockBuilder);
    }