void forward(UINode newContent) {
    setState(() {
      _content = newContent;
    });
  }

  UINode build() {
    List<UINode> overlays = [];
    addMenuToOverlays(overlays);
    _scaffold = new Scaffold(
      header: _isSearching ? buildSearchBar() : buildActionBar(),
      content: _content,
      fab: new FloatingActionButton(
        content: new Icon(type: 'content/add_white', size: 24), level: 3),
      drawer: buildDrawer(),
      overlays: overlays
    );
    return _scaffold;
  }