anchor.diff:      return false;
     }
   
  -  void _syncNode(SkyNodeWrapper old) {
  -    SkyElementWrapper oldSkyElementWrapper = old as SkyElementWrapper;
  +  void _syncNode(RenderNodeWrapper old) {
  +    OneChildListRenderNodeWrapper oldOneChildListRenderNodeWrapper = old as OneChildListRenderNodeWrapper;
   
       List<Style> styles = new List<Style>();
       if (style != null)
         styles.add(style);
       ParentData parentData = null;
       UINode parent = _parent;
  -    while (parent != null && parent is! SkyNodeWrapper) {
  +    while (parent != null && parent is! RenderNodeWrapper) {
         if (parent is StyleNode && parent.style != null)
           styles.add(parent.style);
         else
  
positive.code:   }
  }
  
  class FillStackContainer extends SkyElementWrapper {
  
    RenderCSSStack _root;
    RenderCSSStack _createNode() => new RenderCSSStack(this);
  
    static final FillStackContainer _emptyContainer = new FillStackContainer();
  
    SkyNodeWrapper get _emptyNode => _emptyContainer;
  
    FillStackContainer({
      Object key,
  
negative.code: 
  final List<UINode> _emptyList = new List<UINode>();
  
  abstract class OneChildListRenderNodeWrapper extends RenderNodeWrapper {
  
    final List<UINode> children;
    final Style style;
    final String inlineStyle;
  
    OneChildListRenderNodeWrapper({
      Object key,
      List<UINode> children,
      this.style,
  