public function storeLocale()
 {
     $storeDriver = $this->config->getStoreDriver();
     $key = $this->config->getDefaultKey();
     if ($this->locale !== null && !empty($storeDriver)) {
         $storeDriver = $this->app->make($storeDriver);
         if ($storeDriver instanceof BaseDriver) {
             $storeDriver->store($key, $this->locale);
             return $this->locale;
         }
     }
 }