code: protected function createConfigurationDefinition()
      {
          return new FixerConfigurationResolver(array_merge(
              parent::createConfigurationDefinition()->getOptions(),
              [
                  (new FixerOptionBuilder('syntax', 'Whether to add or remove braces.'))
                      ->setAllowedValues(['with_braces', 'without_braces'])
                      ->setDefault('without_braces')
                      ->getOption(),
              ]
          ));
      }
docs: {@inheritdoc}