anchor.diff:    Future<void> test_sx() async {
       await _checkContainers(
         line: 's^',
  -      validator: (
  -        response, {
  -        required bool isClass,
  -        required bool isMixin,
  -      }) {
  +      validator: (context, response) {
           if (isProtocolVersion2) {
             check(response).suggestions
               ..withKindKeyword.matchesInAnyOrder(
  
positive.code:   $line
  }
  ''');
        validator(
          response,
          isClass: false,
          isMixin: true,
        );
      }
    }
  }
  
negative.code:   Future<void> test_static_final_Ox() async {
      await _checkContainers(
        line: 'static final O^',
        validator: (context, response) {
          if (isProtocolVersion2) {
            check(response).suggestions
              ..withKindKeyword.isEmpty
  