anchor.diff:    f();
   }
   ''';
  -    _checkSingleFileChanges(content, expected);
  +    await _checkSingleFileChanges(content, expected);
     }
   
     test_named_parameter_with_default_used_non_null_option2() async {
  
positive.code:   /// produces the [expected] output.
    Future<void> _checkSingleFileChanges(String content, String expected) async {
      var sourcePath = convertPath('/home/test/lib/test.dart');
      _checkMultipleFileChanges({sourcePath: content}, {sourcePath: expected});
    }
  }
  
  
negative.code:   } */
  }
  ''';
      await _checkSingleFileChanges(content, expected);
    }
  
    test_named_parameter_no_default_unused_option2() async {
  