code: protected function loadReferences($params)
      {
          if ($this->checkAnyNotEmpty($params->passengers, $params->segments)) {
              $this->psaInformation = new PsaInformation();
  
              foreach ($params->passengers as $passenger) {
                  $this->psaInformation->refDetails[] = new RefDetails($passenger, RefDetails::QUAL_PASSENGER);
              }
  
              foreach ($params->segments as $segment) {
                  $this->psaInformation->refDetails[] = new RefDetails($segment, RefDetails::QUAL_SEGMENT_REFERENCE);
              }
          }
      }
docs: Load passenger & segment references
  
  @param TicketDisplayTstOptions $params