protected void importMergedRegions(Sheet poiSheet, SSheet sheet) {
   // merged cells
   // reference RangeImpl.getMergeAreas()
   int nMerged = poiSheet.getNumMergedRegions();
   final SheetImpl sheetImpl = (SheetImpl) sheet;
   for (int i = nMerged - 1; i >= 0; --i) {
     final CellRangeAddress mergedRegion = poiSheet.getMergedRegion(i);
     // ZSS-1114: any new merged region that overlapped with previous merged region is thrown away
     final CellRegion r =
         new CellRegion(
             mergedRegion.getFirstRow(),
             mergedRegion.getFirstColumn(),
             mergedRegion.getLastRow(),
             mergedRegion.getLastColumn());
     final CellRegion overlapped = sheetImpl.checkMergedRegion(r);
     if (overlapped != null) {
       _logger.warning(
           "Drop the region "
               + r
               + " which is overlapped with existing merged area "
               + overlapped
               + ".");
       continue;
     }
     sheetImpl.addDirectlyMergedRegion(r);
   }
 }
  /*
   * import sheet scope content from POI Sheet.
   */
  protected SSheet importSheet(Sheet poiSheet, int poiSheetIndex) {
    SSheet sheet = book.createSheet(poiSheet.getSheetName());
    sheet.setDefaultRowHeight(UnitUtil.twipToPx(poiSheet.getDefaultRowHeight()));
    // ZSS-952
    importSheetDefaultColumnWidth(poiSheet, sheet);
    // reference FreezeInfoLoaderImpl.getRowFreeze()
    sheet.getViewInfo().setNumOfRowFreeze(BookHelper.getRowFreeze(poiSheet));
    sheet.getViewInfo().setNumOfColumnFreeze(BookHelper.getColumnFreeze(poiSheet));
    sheet
        .getViewInfo()
        .setDisplayGridlines(
            poiSheet
                .isDisplayGridlines()); // Note isDisplayGridlines() and isPrintGridlines() are
                                        // different
    sheet.getViewInfo().setColumnBreaks(poiSheet.getColumnBreaks());
    sheet.getViewInfo().setRowBreaks(poiSheet.getRowBreaks());

    SPrintSetup sps = sheet.getPrintSetup();

    SHeader header = sheet.getViewInfo().getHeader();
    if (header != null) {
      header.setCenterText(poiSheet.getHeader().getCenter());
      header.setLeftText(poiSheet.getHeader().getLeft());
      header.setRightText(poiSheet.getHeader().getRight());
      sps.setHeader(header);
    }

    SFooter footer = sheet.getViewInfo().getFooter();
    if (footer != null) {
      footer.setCenterText(poiSheet.getFooter().getCenter());
      footer.setLeftText(poiSheet.getFooter().getLeft());
      footer.setRightText(poiSheet.getFooter().getRight());
      sps.setFooter(footer);
    }

    if (poiSheet.isDiffOddEven()) {
      Header poiEvenHeader = poiSheet.getEvenHeader();
      if (poiEvenHeader != null) {
        SHeader evenHeader = new HeaderFooterImpl();
        evenHeader.setCenterText(poiEvenHeader.getCenter());
        evenHeader.setLeftText(poiEvenHeader.getLeft());
        evenHeader.setRightText(poiEvenHeader.getRight());
        sps.setEvenHeader(evenHeader);
      }
      Footer poiEvenFooter = poiSheet.getEvenFooter();
      if (poiEvenFooter != null) {
        SFooter evenFooter = new HeaderFooterImpl();
        evenFooter.setCenterText(poiEvenFooter.getCenter());
        evenFooter.setLeftText(poiEvenFooter.getLeft());
        evenFooter.setRightText(poiEvenFooter.getRight());
        sps.setEvenFooter(evenFooter);
      }
    }

    if (poiSheet.isDiffFirst()) {
      Header poiFirstHeader = poiSheet.getFirstHeader();
      if (poiFirstHeader != null) {
        SHeader firstHeader = new HeaderFooterImpl();
        firstHeader.setCenterText(poiFirstHeader.getCenter());
        firstHeader.setLeftText(poiFirstHeader.getLeft());
        firstHeader.setRightText(poiFirstHeader.getRight());
        sps.setFirstHeader(firstHeader);
      }
      Footer poiFirstFooter = poiSheet.getFirstFooter();
      if (poiFirstFooter != null) {
        SFooter firstFooter = new HeaderFooterImpl();
        firstFooter.setCenterText(poiFirstFooter.getCenter());
        firstFooter.setLeftText(poiFirstFooter.getLeft());
        firstFooter.setRightText(poiFirstFooter.getRight());
        sps.setFirstFooter(firstFooter);
      }
    }

    PrintSetup poips = poiSheet.getPrintSetup();

    sps.setBottomMargin(poiSheet.getMargin(Sheet.BottomMargin));
    sps.setTopMargin(poiSheet.getMargin(Sheet.TopMargin));
    sps.setLeftMargin(poiSheet.getMargin(Sheet.LeftMargin));
    sps.setRightMargin(poiSheet.getMargin(Sheet.RightMargin));
    sps.setHeaderMargin(poiSheet.getMargin(Sheet.HeaderMargin));
    sps.setFooterMargin(poiSheet.getMargin(Sheet.FooterMargin));

    sps.setAlignWithMargins(poiSheet.isAlignMargins());
    sps.setErrorPrintMode(poips.getErrorsMode());
    sps.setFitHeight(poips.getFitHeight());
    sps.setFitWidth(poips.getFitWidth());
    sps.setHCenter(poiSheet.getHorizontallyCenter());
    sps.setLandscape(poips.getLandscape());
    sps.setLeftToRight(poips.getLeftToRight());
    sps.setPageStart(poips.getUsePage() ? poips.getPageStart() : 0);
    sps.setPaperSize(PoiEnumConversion.toPaperSize(poips.getPaperSize()));
    sps.setCommentsMode(poips.getCommentsMode());
    sps.setPrintGridlines(poiSheet.isPrintGridlines());
    sps.setPrintHeadings(poiSheet.isPrintHeadings());

    sps.setScale(poips.getScale());
    sps.setScaleWithDoc(poiSheet.isScaleWithDoc());
    sps.setDifferentOddEvenPage(poiSheet.isDiffOddEven());
    sps.setDifferentFirstPage(poiSheet.isDiffFirst());
    sps.setVCenter(poiSheet.getVerticallyCenter());

    Workbook poiBook = poiSheet.getWorkbook();
    String area = poiBook.getPrintArea(poiSheetIndex);
    if (area != null) {
      sps.setPrintArea(area);
    }

    CellRangeAddress rowrng = poiSheet.getRepeatingRows();
    if (rowrng != null) {
      sps.setRepeatingRowsTitle(rowrng.getFirstRow(), rowrng.getLastRow());
    }

    CellRangeAddress colrng = poiSheet.getRepeatingColumns();
    if (colrng != null) {
      sps.setRepeatingColumnsTitle(colrng.getFirstColumn(), colrng.getLastColumn());
    }

    sheet.setPassword(poiSheet.getProtect() ? "" : null);

    // import hashed password directly
    importPassword(poiSheet, sheet);

    // ZSS-832
    // import sheet visible
    if (poiBook.isSheetHidden(poiSheetIndex)) {
      sheet.setSheetVisible(SheetVisible.HIDDEN);
    } else if (poiBook.isSheetVeryHidden(poiSheetIndex)) {
      sheet.setSheetVisible(SheetVisible.VERY_HIDDEN);
    } else {
      sheet.setSheetVisible(SheetVisible.VISIBLE);
    }

    // ZSS-1130
    // import conditionalFormatting
    importConditionalFormatting(sheet, poiSheet);
    return sheet;
  }