currentLoader = new RefreshDataLoader(component, klass, nodes);
currentLoader = new RefreshDataLoader(component, klass, nodes, expandedTopNodes);
    void loadRefreshedData(List nodes)    {        Class klass = null;        if (browserType == Browser.PROJECT_EXPLORER) klass = ProjectData.class;        else if (browserType == Browser.CATEGORY_EXPLORER)             klass = CategoryGroupData.class;        if (klass == null) return;        state = Browser.LOADING_DATA;        currentLoader = new RefreshDataLoader(component, klass, nodes);        currentLoader.load();       }