anchor.diff:    }
   
     bool _hasStoredRequest() {
  -    return (_lastRun != null && _lastRun[FileType.DART] == context.dartSource && _lastRun[FileType.CSS] == context.htmlSource 
  -        &&  _lastRun[FileType.CSS] == context.cssSource && _cachedCompile != null);
  +    return (_lastRun != null && _lastRun[_FileType.DART] == context.dartSource && _lastRun[_FileType.CSS] == context.htmlSource 
  +        &&  _lastRun[_FileType.CSS] == context.cssSource && _cachedCompile != null);
     }
    
     void _storePreviousResult() {
  
positive.code:   _playground = new PlaygroundMobile();
  }
  
  enum FileType {
    DART, CSS, HTML
  }
  
  
negative.code:   PaperIconButton _resetButton;
    PaperTabs _tabs;
  
    Map<_FileType, String> _lastRun;
    Router _router;
    
    CompileResponse _cachedCompile;
  