code: protected function writeConfig(string $file, $config)
      {
          $config = var_export($config, true);
          $config = str_replace('stdClass::__set_state', '(object)', $config);
          $config = "<?php\n\rreturn " . $config . ';';
          $this->fileWrite($file, $config);
      }
docs: {@inheritdoc}