code: protected function createConfigurationDefinition()
      {
          return new FixerConfigurationResolver([
              (new FixerOptionBuilder('use_escape_sequences_in_strings', 'Whether characters should be replaced with escape sequences in strings.'))
                  ->setAllowedTypes(['bool'])
                  ->setDefault(false) // @TODO 3.0 change to true
                  ->setNormalizer(static function (Options $options, $value) {
                      if (\PHP_VERSION_ID < 70000 && $value) {
                          throw new InvalidOptionsForEnvException('Escape sequences require PHP 7.0+.');
                      }
  
                      return $value;
                  })
                  ->getOption(),
          ]);
      }
docs: {@inheritdoc}