anchor.diff:    AnalysisContext _context;
     // MemoryResolver _resolver;
     String _sdkPath;
  +  Directory _sourceDirectory;
   
     ContentCache cache;
   
  
positive.code: 
      this.cache = new ContentCache();
  
      var sourceDirectory = Directory.systemTemp.createTempSync('analyzer');
      // _resolver = new MemoryResolver();
  
      PhysicalResourceProvider physicalResourceProvider =
  
negative.code:     //   return _resolver;
      // };
      
      _context = builder.buildContext(_sourceDirectory.path);
  
  
      // _context.analysisOptions = options;
  