anchor.diff:  
   export 'package:polymer/init.dart';
   
  -final List<String> slides = const <String>[
  +const List<String> _slides = const <String>[
     'info',
     'hier',
     'dep',
     'load',
     'diff'
   ];
  -final Duration animationTime = const Duration(milliseconds: 10);
  +const Duration _animationTime = const Duration(milliseconds: 10);
   
   void _noSlide() {
     // Disable all of the slides and tabs
  -  for (String id in slides) {
  +  for (String id in _slides) {
       var slide = document.querySelector('#$id-slide');
       slide.style.opacity = '0';
       //slide.style.left = '100px';
  
positive.code:   slide.style.maxHeight = 'none';
    slide.style.zIndex = '1';
  
    new Timer(animationTime, () {
      slide.style.opacity = '1';
      slide.style.left = '0px';
      var tab = document.querySelector('#$id-tab');
  
negative.code: 
  @whenPolymerReady
  void init() {
    HistoryState.setup(_switchSlide, _animationTime);
    _noSlide();
    _switchSlide('load');
  
  