anchor.diff:  // Copyright 2015 The Chromium Authors. All rights reserved.
   // Use of this source code is governed by a BSD-style license that can be
   // found in the LICENSE file.
  -
  -import 'dart:sky' as sky;
   
   import 'package:sky/rendering/box.dart';
   import 'package:sky/theme2/typography.dart' as typography;
  
positive.code:         height: kHeight,
          decoration: const BoxDecoration(
              border: const Border(
                  bottom: const BorderSide(color: const sky.Color(0xFFF4F4F4)))),
          child: new Flex(children)
        )
      );
  
negative.code: 
    final Stock stock;
  
    static const double kHeight = 79.0;
  
    UINode build() {
      String lastSale = "\$${stock.lastSale.toStringAsFixed(2)}";
  