if (DEBUG_HIERARCHY) System.out.println("} Done Computing");
	public void compute() {		if (DEBUG_HIERARCHY) 		System.out.println("Computing");		immediateSubtypes.clear();		transitiveSubtypes.clear();		parentsAdded.clear();		for(JavaClass c : handled)  {			immediateSubtypes.put(c, new HashSet<JavaClass>());			}		for(JavaClass c : new HashSet<JavaClass>(handled))  {			addParents(c);			}		for(JavaClass c : handled)  {			compute(c);			}		computed = true;		}