anchor.diff:      return true;
     }
   
  -  bool get _isBenchmarking {
  -    return argResults.wasParsed('benchmark-out') || argResults.wasParsed('benchmark-expected');
  -  }
  +  bool get _isBenchmarking => argResults['benchmark'];
   
     Future<int> _analyzeOnce() async {
       Stopwatch stopwatch = new Stopwatch()..start();
  
positive.code:     }
  
      AnalysisServer server = new AnalysisServer(dartSdkPath, directories);
      server.onAnalyzing.listen(_handleAnalysisStatus);
      server.onErrors.listen(_handleAnalysisErrors);
  
      await server.start();
  
negative.code: 
        if (firstAnalysis && _isBenchmarking) {
          _writeBenchmark(analysisTimer, issueCount);
          server.dispose().then((_) => exit(0));
        }
  
        firstAnalysis = false;
  