anchor.diff:    }
   
     @override
  -  ng.TemplateAst visitEmbeddedContent(ast.EmbeddedContentAst astNode,
  -          [ParseContext _]) =>
  -      new ng.NgContentAst(
  -          ngContentIndex++, 0 /* ngContentIndex */, astNode.sourceSpan);
  -
  -  @override
     ng.TemplateAst visitEmbeddedTemplate(ast.EmbeddedTemplateAst astNode,
         [ParseContext context]) {
       var matchedDirectives = _matchTemplateDirectives(context, astNode);
  
positive.code: }
  
  /// Visitor which filters elements that are not supported in angular templates.
  class ElementFilter implements ast.TemplateAstVisitor<ast.TemplateAst, bool> {
    List<T> visitAll<T extends ast.TemplateAst>(Iterable<T> astNodes,
        [bool hasNgNonBindable = false]) {
      final result = <T>[];
  
negative.code:     }
      return false;
    }
  }
  