anchor.diff:      return errorStrings;
     }
   
  -  AnalysisContext _createAnalysisContext(LibraryContext libraryContext) {
  +  AnalysisContext _createAnalysisContext(_LibraryContext libraryContext) {
       AnalysisContextImpl analysisContext =
           AnalysisEngine.instance.createAnalysisContext();
   
  
positive.code:         _byteStore.put(key, bytes);
        });
  
        return new LibraryContext(libraryFile, libraryNode, store);
      });
    }
  
  
negative.code:     }
      // If no cached unlinked bundle, compute it.
      if (bytes == null) {
        _logger.run('Create unlinked for $file', () {
          // We read the content and recomputed the hash.
          // So, we need to update the key.
          String key = '${file.contentHash}.unlinked';
  