/**
  * @see EPSInterface::validateAddress()
  */
 public function validateAddress($sessionId, $address, $validationMode)
 {
     try {
         $validateAddressStdObject = new stdClass();
         $validateAddressStdObject->sessionId = $sessionId;
         $validateAddressStdObject->address = $address->toStdClass();
         $validateAddressStdObject->validationMode = $validationMode;
         $response = parent::validateAddress($validateAddressStdObject);
         return $response->return;
     } catch (SoapFault $sf) {
         throw new ServerException($sf);
     }
 }