docs: private static Map<String, PictureData> getPicMapXlsx(XSSFWorkbook workbook, int sheetIndex) {
  		final Map<String, PictureData> sheetIndexPicMap = new HashMap<String, PictureData>();
  		final XSSFSheet sheet = workbook.getSheetAt(sheetIndex);
  		XSSFDrawing drawing;
  		for (POIXMLDocumentPart dr : sheet.getRelations()) {
  			if (dr instanceof XSSFDrawing) {
  				drawing = (XSSFDrawing) dr;
  				final List<XSSFShape> shapes = drawing.getShapes();
  				XSSFPicture pic;
  				CTMarker ctMarker;
  				for (XSSFShape shape : shapes) {
  					pic = (XSSFPicture) shape;
  					ctMarker = pic.getPreferredSize().getFrom();
  					sheetIndexPicMap.put(StrUtil.format("{}_{}", ctMarker.getRow(), ctMarker.getCol()), pic.getPictureData());
  				}
  			}
  		}
  		return sheetIndexPicMap;
  	}