System.out.println("Checking " + l.gid);
	public NodeSet except(NodeSet other) {	    System.out.println(other.getClass().getName());		AVLTreeNodeSet r = new AVLTreeNodeSet();		NodeProxy l, p;		for (Iterator i = iterator(); i.hasNext();) {			l = (NodeProxy) i.next();			System.out.println("Checking " + l.gid);			if (!other.contains(l)) {				r.add(l);			}		}		return r;	}