anchor.diff:  
   class _PestoDemoState extends State<PestoDemo> {
     final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
  +  final TextStyle favoritesMessageStyle = _textStyle(16.0);
     final TextStyle userStyle = _textStyle(12.0, FontWeight.bold);
     final TextStyle emailStyle = _textStyle(12.0).copyWith(color: Colors.black54);
   
     @override
     Widget build(BuildContext context) {
  -    final double statusBarHeight = MediaQuery.of(context).padding.top;
  -
  -    List<Recipe> recipes = config.showFavorites ? favoriteRecipes.toList() : kRecipes;
  -
       return new Theme(
         data: _kTheme,
         child: new Scaffold(
  
positive.code:               )
              ]
            )
          ]
        )
      );
    }
  
  
negative.code:   Widget build(BuildContext context) {
      return new GestureDetector(
        onTap: onTap,
        child: new Hero(
          tag: recipe.imagePath,
          child: new Card(
            child: new Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                new AssetImage(
                  name: recipe.imagePath,
                  fit: ImageFit.scaleDown
                ),
                new Flexible(
                  child: new Row(
                    children: <Widget>[
                      new Padding(
                        padding: const EdgeInsets.all(16.0),
                        child: new AssetImage(
                          width: 48.0,
                          height: 48.0,
                          name: recipe.ingredientsImagePath
                        )
                      ),
                      new Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        mainAxisAlignment: MainAxisAlignment.center,
                        children: <Widget>[
                          new Text(recipe.name, style: titleStyle),
                          new Text(recipe.author, style: authorStyle),
                        ]
                      )
                    ]
                  )
                )
              ]
            )
          )
        )
      );
  