anchor.diff:    Widget build(BuildContext context);
   
     /// Trampoline to make the [build] closure library-accessible.
  -  _BuildFunction get _build => build;
  +  WidgetBuilder get _build => build;
   }
   
   /// StatefulWidgets provide the configuration for
  
positive.code:   }
  }
  
  /// The signature of build() functions.
  typedef Widget _BuildFunction(BuildContext context);
  
  /// StatelessWidgets describe a way to compose other Widgets to form reusable
  /// parts, which doesn't depend on anything other than the configuration
  /// information in the object itself. (For compositions that can change
  
negative.code:   Widget build(BuildContext context);
  
    /// Trampoline to make the [build] closure library-accessible.
    WidgetBuilder get _build => build;
  
    /// Called when an Inherited widget in the ancestor chain has changed. Usually
    /// there is nothing to do here; whenever this is called, build() is also
  