anchor.diff:    final DElement footer;
     final DElement expandIcon;
     final Counter unreadCounter;
  +  final Function onSizeChanged;
     Splitter _splitter;
     bool _expanded;
   
  
positive.code:           footer: querySelector('#console-output-footer'),
            expandIcon: querySelector('#console-expand-icon'),
            unreadCounter: unreadConsoleCounter,
            consoleElement: querySelector('#console-output-container'));
      } else {
        consoleExpandController =
            ConsoleController(querySelector('#console-output-container'));
  
negative.code:     Element expandIcon,
      Element consoleElement,
      this.unreadCounter,
      this.onSizeChanged,
    })  : expandButton = DElement(expandButton),
          footer = DElement(footer),
          expandIcon = DElement(expandIcon),
  