/**
  * @param $enquiryId
  * @return ArrayList<EnquiryMessage>|EnquiryMessage[]
  * @throws IllegalArgumentException
  */
 public function getEnquiryMessages($enquiryId)
 {
     $this->checkAuthorized();
     return $this->servlet->getRepository()->getEnquiryMessages($this->wrap('enquiryId', $enquiryId));
 }