code: protected function fix($directory)
      {
          if (!class_exists('PhpCsFixer\Config')) {
              return;
          }
  
          /** @var Config $fixerConfig */
          $fixerConfig = $this->fixerConfig;
  
          if (null === $fixerConfig) {
              $fixerConfig = Config::create()
                  ->setRiskyAllowed(true)
                  ->setRules(
                      array(
                          '@Symfony' => true,
                          'array_syntax' => array('syntax' => 'short'),
                          'simplified_null_return' => false,
                          'ordered_imports' => true,
                          'phpdoc_order' => true,
                          'binary_operator_spaces' => array('align_equals'=>true),
                          'concat_space' => false,
                          'yoda_style' => false,
                          'header_comment' => [
                              'header' => <<<EOH
  This file has been auto generated by Jane,
  
  Do no edit it directly.
  EOH
                              ,
                          ]
                      )
                  );
          }
          $resolverOptions = array('allow-risky' => true);
          $resolver = new ConfigurationResolver($fixerConfig, $resolverOptions, $directory, new ToolInfo());
  
          $finder = new Finder();
          $finder->in($directory);
          $fixerConfig->setFinder($finder);
  
          $runner = new Runner(
              $resolver->getConfig()->getFinder(),
              $resolver->getFixers(),
              new NullDiffer(),
              null,
              new ErrorsManager(),
              new Linter(),
              false,
              new NullCacheManager()
          );
  
          return $runner->fix();
      }
docs: Use php cs fixer to have a nice formatting of generated files
  
  @param string $directory
  
  @return array|void