anchor.diff:        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;
  +      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];
  
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:       removeChild(_toolbar);
      if (_body != null)
        removeChild(_body);
      if (_statusBar != null)
        removeChild(_statusBar);
      if (_drawer != null)
        removeChild(_drawer);
      if (_floatingActionButton != null)
  