private Unit getAppCntxtInsPt(){
		for(Unit u : b.getUnits()){
			Iterator it = u.getUseBoxes().iterator();
			while(it.hasNext()){
				Value v = ((ValueBox)it.next()).getValue();
				if(v instanceof IdentityRef){ //includes ThisRef and ParameterRef
					continue;
				}
				else{
					return u;
				}
			}	
		}
		return null;
	}