presto-spi/src/main/java/io/prestosql/spi/block/RowBlock.java/RowBlock/createRowBlockInternal
class RowBlock:    static RowBlock createRowBlockInternal(int startOffset, int positionCount, @Nullable boolean[] rowIsNull, int[] fieldBlockOffsets, Block[] fieldBlocks)
    {
        validateConstructorArguments(startOffset, positionCount, rowIsNull, fieldBlockOffsets, fieldBlocks);
        return new RowBlock(startOffset, positionCount, rowIsNull, fieldBlockOffsets, fieldBlocks);
    }