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:     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;
  
  
negative.code:       bodyHeight -= toolbarHeight;
      }
      if (_slots[ScaffoldSlots.statusBar] != null) {
        RenderBox statusBar = _slots[ScaffoldSlots.statusBar];
        statusBar.layout(new BoxConstraints.tight(new Size(size.width, kStatusBarHeight)));
        assert(statusBar.parentData is BoxParentData);
        statusBar.parentData.position = new Point(0.0, size.height - kStatusBarHeight);
        bodyHeight -= kStatusBarHeight;
      }
      if (_slots[ScaffoldSlots.body] != null) {
        RenderBox body = _slots[ScaffoldSlots.body];
  