anchor.diff:  
       final int indexOfPhone = listOfPhones.indexOf(phone);
       if (indexOfPhone == -1) {
  +      print(simulatorsList);
         throw Exception('Simulator of $phone is not available for iOS version '
             '${osMajorVersion}.${osMinorVersion}');
       }
  
positive.code: 
      final String deviceListOutput = deviceListResult.stdout as String;
      if (!deviceListOutput.contains(device)) {
        throw Exception('Mac does not have the requested device type $device '
            'available for simulators. Please use XCode to install.');
      }
  
      // Prepate device type argument. It should look like:
  
negative.code: 
      final String output = runtimeListResult.stdout as String;
      if (!output.contains(runtime)) {
        print(output);
        throw Exception('Mac does not have the requested $runtime '
            'available for simulators. Please use Xcode to install.');
      }
  
      // Check if the device is available.
  