buf.append("x");
buf.append("*");
	public String toString() {		StringBuffer buf = new StringBuffer();		buf.append("{");		int count = 0;		for (int i = 0; i < countList.length; ++i) {			if (countList[i] == 0)				continue;			if (count > 0)				buf.append(",");			if (ObligationFactory.instance != null) {				buf.append(ObligationFactory.instance.getObligationById(i).toString());			} else {				buf.append("id=");				buf.append(i);			}			buf.append("x");			buf.append(countList[i]);			++count;		}		buf.append("}");		return buf.toString();	}