code: protected function createConfigurationDefinition()
      {
          $fixerName = $this->getName();
  
          return new FixerConfigurationResolver([
              (new FixerOptionBuilder('header', 'Proper header content.'))
                  ->setAllowedTypes(['string'])
                  ->setNormalizer(static function (Options $options, $value) use ($fixerName) {
                      if ('' === trim($value)) {
                          return '';
                      }
  
                      if (false !== strpos($value, '*/')) {
                          throw new InvalidFixerConfigurationException($fixerName, 'Cannot use \'*/\' in header.');
                      }
  
                      return $value;
                  })
                  ->getOption(),
              (new AliasedFixerOptionBuilder(
                  new FixerOptionBuilder('comment_type', 'Comment syntax type.'),
                  'commentType'
              ))
                  ->setAllowedValues([self::HEADER_PHPDOC, self::HEADER_COMMENT])
                  ->setDefault(self::HEADER_COMMENT)
                  ->getOption(),
              (new FixerOptionBuilder('location', 'The location of the inserted header.'))
                  ->setAllowedValues(['after_open', 'after_declare_strict'])
                  ->setDefault('after_declare_strict')
                  ->getOption(),
              (new FixerOptionBuilder('separate', 'Whether the header should be separated from the file content with a new line.'))
                  ->setAllowedValues(['both', 'top', 'bottom', 'none'])
                  ->setDefault('both')
                  ->getOption(),
          ]);
      }
docs: {@inheritdoc}