/**
  * Sends the TrackNotificationRequest and returns the response
  *
  * @param ComplexType\TrackNotificationRequest $trackNotificationRequest 
  * @return stdClass
  */
 public function getGetTrackNotificationReply(ComplexType\TrackNotificationRequest $trackNotificationRequest)
 {
     return $this->_soapClient->getTrackNotification($trackNotificationRequest->toArray());
 }