return " " + dataflow.getAnalysis().factToString(dataflow.getResultFact(bb));
boolean flip = isForwards() != dataflow.getAnalysis().isForwards(); Fact fact = flip ? dataflow.getStartFact(bb) : dataflow.getResultFact(bb) ;  return " " + dataflow.getAnalysis().factToString(fact);
	public String blockAnnotate(BasicBlock bb) {		return " " + dataflow.getAnalysis().factToString(dataflow.getResultFact(bb));	}