anchor.diff:            new Divider(),
             new DrawerItem(
               child: new Text('Return to Gallery'),
  +            icon: new Icon(Icons.arrow_back),
               onPressed: () {
                 Navigator.popUntil(context, ModalRoute.withName('/'));
               }
  
positive.code:           ),
            new DrawerItem(
              child: new Text('Home'),
              selected: !showFavorites,
              onPressed: () {
                Navigator.popUntil(context, ModalRoute.withName('/pesto'));
  
negative.code:           ),
            new DrawerItem(
              child: new Text('Favorites'),
              icon: new Icon(Icons.favorite),
              selected: showFavorites,
              onPressed: () {
                if (showFavorites)
  