src/org/tiefaces/components/websheet/serializable/SerialWorkbook.java
public void recover() {
		Map<String, SheetConfiguration> map = this.getSheetConfigMap();
		for (Entry<String, SheetConfiguration> entry : map.entrySet()) {
			entry.getValue().recover(this.getWb());
		}
	}
public void recover() {
		Map<String, SheetConfiguration> map = this.getSheetConfigMap();
		for (Entry<String, SheetConfiguration> entry : map.entrySet()) {
			entry.getValue().recover(this.getWb());
		}
	}
recover the cell reference to the sheet.