/**
  * this is body of mail + pm
  * @see NotificationEvent::getMessage()
  */
 public function getMessage(NotificationType $notificationType, $additionalVariables = array())
 {
     $additionalVariables = array_merge($additionalVariables, $this->getObject()->getData());
     $key = $this->languageCategory . '.' . $this->getEventName() . '.' . $notificationType->getName();
     $tmp = $this->getLanguageVariable($key, $additionalVariables);
     if ($tmp) {
         return $tmp;
     } else {
         $key = $this->languageCategory . '.' . $this->getEventName() . '.' . self::FALLBACK_NOTIFICATION_TYPE;
         return $this->getLanguageVariable($key, $additionalVariables);
     }
 }