return 0;
return sum;
    static int getSplitterNumWork (SIRSplitter splitter) {	if (splitter.getType()==SIRSplitType.DUPLICATE) {	    return 1;	} else if (splitter.getType()==SIRSplitType.NULL) {	    return 1;	} else {	    int sum = splitter.getSumOfWeights();	    // if the sum is zero, still represent that we have 1 work function	    if (sum==0) {		return 1;	    } else {		return 0;	    }	}    }