anchor.diff:      _docPanel = querySelector('#documentation');
     }
     
  -  void registerOutputPanel() {
  -    _outputPanel = querySelector('#frameContainer');
  -  }
  -  
     void registerPaperDrawer() {
       _docPanel = querySelector('#documentation');
     }
  
positive.code: import '../sharing/gists.dart';
  import '../src/ga.dart';
  import '../src/sample.dart' as sample;
  import '../src/util.dart';
  
  PlaygroundMobile get playground => _playground;
  
  
negative.code:     registerMessageDialog();
      registerResetDialog();
      registerDocPanel();
      registerSelectorTabs();
      registerBusyLight();
      registerEditProgress();
  