Iterator traversal = BreadthFirstTraversal.getTraversal(top).iterator();
Iterator traversal = DataFlowTraversal.getTraversal(top).iterator();
    private void visitGraph(FlatNode top, boolean isInit)     {	Iterator traversal = BreadthFirstTraversal.getTraversal(top).iterator();	while (traversal.hasNext()) {	    FlatNode node = (FlatNode)traversal.next();	    //	    System.out.println("Generating Code for  " + node.contents);	    generateCode(node, isInit);	}    }