/**
  * Listens to the routing.load_configuration event.
  *
  * @param sfEvent An sfEvent instance
  */
 public static function listenToApplicationThrowExceptionEvent(sfEvent $event)
 {
     $apiKey = sfConfig::get('app_sf_hoptoad_notifier_plugin_api_key', false);
     if ($apiKey) {
         if (!defined('HOPTOAD_API_KEY')) {
             define('HOPTOAD_API_KEY', $apiKey);
         }
         $r = $event->getSubject();
         Hoptoad::exceptionHandler($r);
     }
 }