anchor.diff:        new Future.value(window.localStorage[key]);
   
     int get size {
  +    _sizeAccessed = true;
       var hash = (_urlHash == null) ? '7' : _urlHash;
       hash = hash.replaceAll('#', '');
       return int.parse(hash, onError: (e) => 7);
  
positive.code:     var hash = loc.hash;
      var href = loc.href;
  
      final History history = window.history;
      switch (hash) {
        case "#reset":
          assert(href.endsWith(hash));
  
negative.code:         _aboutController.add(null);
          break;
        default:
          if (hash.isNotEmpty && _sizeAccessed) {
            loc.reload();
          }
          break;
      }
    }
  