[Bug 54751] Add levels to groupRow

[bu...@apache.org]

https://bz.apache.org/bugzilla/show_bug.cgi?id=54751

--- Comment #1 from Eugene Kortov <ko...@gmail.com> ---
Hi, I checked on Poi 4.1.1 and doesn't have such behaviour with this code
(added a screenshot "Screenshot from 2020-04-15 14-55-04.png")

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.FileInputStream;
import java.io.FileOutputStream;

class ExcelGroupColumns {

    public static void main(String[] args) throws Exception{

        Workbook workbook = new XSSFWorkbook();

        Sheet sheet = workbook.createSheet("Sheet1");
        for (int rowNum = 0; rowNum < 6; rowNum++) {
            Row row = sheet.createRow(rowNum);
            for (int i = 0; i < 25; i++) {
                Cell cell = row.createCell(i);
                cell.setCellValue("Col" + rowNum + " " + i);

            }
        }

        sheet.groupRow( 0, 5 );
        sheet.groupRow( 1, 4 );
        sheet.groupRow( 2, 3 );



        FileOutputStream out = new FileOutputStream("Test_1.xlsx");
        workbook.write(out);
        out.close();
        workbook.close();

    }
}

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