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:   }
    
    void _setBackup () {
      _lastRun = new Map<FileType, String>();
      _lastRun[FileType.DART] = context.dartSource;
      _lastRun[FileType.HTML] = context.htmlSource;
      _lastRun[FileType.CSS] = context.cssSource;
    }
    
    void _setGistId(String id) {
  
negative.code:   _playground = new PlaygroundMobile();
  }
  
  enum _FileType {
    DART, CSS, HTML
  }
  
  