Code:
  private void createTreeContent() {
    Tree tree = new Tree();
    tree.setItemIconStyle("icon-list");

    TreeLoader loader = new BaseTreeLoader(new TreeModelReader());
    treeStore = new TreeStore<ModelData>(loader);

    binder = new TreeBinder(tree, treeStore);
    binder.setAutoLoad(true);
    binder.setDisplayProperty("name");

    SelectionService.get().addListener(new SourceSelectionChangedListener(binder));
    SelectionService.get().register(binder);

    filter.bind(treeStore);
    loader.load(model);

    treeItem.setBorders(false);
    treeItem.setScrollMode(Scroll.AUTO);
    treeItem.add(tree);
    tree.expandAll();
  }