anchor.diff:    RenderScaffold({
       RenderBox toolbar,
       RenderBox body,
  -    RenderBox statusbar,
  +    RenderBox statusBar,
       RenderBox drawer,
       RenderBox floatingActionButton
     }) {
       this[ScaffoldSlots.toolbar] = toolbar;
       this[ScaffoldSlots.body] = body;
  -    this[ScaffoldSlots.statusBar] = statusbar;
  +    this[ScaffoldSlots.statusBar] = statusBar;
       this[ScaffoldSlots.drawer] = drawer;
       this[ScaffoldSlots.floatingActionButton] = floatingActionButton;
     }
  
positive.code:     super.syncRenderObject(old);
      _toolbar = syncChild(_toolbar, old is Scaffold ? old._toolbar : null, ScaffoldSlots.toolbar);
      _body = syncChild(_body, old is Scaffold ? old._body : null, ScaffoldSlots.body);
      _statusbar = syncChild(_statusbar, old is Scaffold ? old._statusbar : null, ScaffoldSlots.statusBar);
      _drawer = syncChild(_drawer, old is Scaffold ? old._drawer : null, ScaffoldSlots.drawer);
      _floatingActionButton = syncChild(_floatingActionButton, old is Scaffold ? old._floatingActionButton : null, ScaffoldSlots.floatingActionButton);
    }
  
negative.code:     Object key,
      UINode toolbar,
      UINode body,
      UINode statusBar,
      UINode drawer,
      UINode floatingActionButton
    }) : _toolbar = toolbar,
         _body = body,
         _statusBar = statusBar,
         _drawer = drawer,
         _floatingActionButton = floatingActionButton,
         super(key: key);
  
    UINode _toolbar;
    UINode _body;
    UINode _statusBar;
    UINode _drawer;
    UINode _floatingActionButton;
  
  