docs: public static boolean isMergedRegion(Sheet sheet, int row, int column) {
  		final int sheetMergeCount = sheet.getNumMergedRegions();
  		CellRangeAddress ca;
  		for (int i = 0; i < sheetMergeCount; i++) {
  			ca = sheet.getMergedRegion(i);
  			if (row >= ca.getFirstRow() && row <= ca.getLastRow() && column >= ca.getFirstColumn() && column <= ca.getLastColumn()) {
  				return true;
  			}
  		}
  		return false;
  	}