code: protected Set<CellElement> getIgnoredCellElementsForColSpan(Band band) {
          Set<CellElement> result = new HashSet<CellElement>();
          int rows = band.getRowCount();
          int cols = band.getColumnCount();
          for (int i = 0; i < rows; i++) {
              for (int j = 0; j < cols; j++) {
                  BandElement element = band.getElementAt(i, j);
                  if (element == null) {
                      continue;
                  }
                  //int rowSpan = element.getRowSpan();
                  int colSpan = element.getColSpan();
                  if (colSpan > 1) {
                      for (int k = 1; k < colSpan; k++) {
                          result.add(new CellElement(i, j + k));
                      }
                  }
              }
          }
          return result;
      }
docs: because there was no support for row span