anchor.diff:      }
   
       // Prepare launch arguments.
  -    List<String> args = <String>["--enable-dart-profiling"];
  +    List<String> args = <String>['--enable-dart-profiling'];
   
       if (!prebuiltApplication) {
         args.addAll(<String>[
  -        "--flx=${path.absolute(path.join(getBuildDirectory(), 'app.flx'))}",
  -        "--dart-main=${path.absolute(mainPath)}",
  -        "--packages=${path.absolute('.packages')}",
  +        '--flx=${path.absolute(path.join(getBuildDirectory(), 'app.flx'))}',
  +        '--dart-main=${path.absolute(mainPath)}',
  +        '--packages=${path.absolute('.packages')}',
         ]);
       }
   
       if (debuggingOptions.debuggingEnabled) {
         if (debuggingOptions.buildMode == BuildMode.debug)
  -        args.add("--enable-checked-mode");
  +        args.add('--enable-checked-mode');
         if (debuggingOptions.startPaused)
  -        args.add("--start-paused");
  +        args.add('--start-paused');
   
         int observatoryPort = await debuggingOptions.findBestObservatoryPort();
  -      args.add("--observatory-port=$observatoryPort");
  +      args.add('--observatory-port=$observatoryPort');
         int diagnosticPort = await debuggingOptions.findBestDiagnosticPort();
  -      args.add("--diagnostic-port=$diagnosticPort");
  +      args.add('--diagnostic-port=$diagnosticPort');
       }
   
       ProtocolDiscovery observatoryDiscovery;
  
positive.code:   @override
    bool isSupported() {
      if (!p.platform.isMacOS) {
        _supportMessage = "Not supported on a non Mac host";
        return false;
      }
  
  
negative.code:     if (name.contains('iPhone 5s'))
        return true;
  
      _supportMessage = 'The simulator version is too old. Choose an iPhone 5s or above.';
      return false;
    }
  
  