System.out.println("userObject "+node.getChildrenDisplay());
    public void visit(TreeImageSet node)    {        Object userObject = node.getUserObject();        System.out.println("userObject "+node.getChildrenDisplay());        if ((userObject instanceof DatasetData) ||                 (userObject instanceof CategoryData)) {            System.out.println("userObject "+userObject);            if (node.isChildrenLoaded()) foundNodes.add(userObject);        }    }