/**
  * DatatablePayload constructor.
  * @param DatatableRequestInterface|null $request
  */
 public function __construct(DatatableRequestInterface $request = null)
 {
     $this->setServiceLocator(ServiceManager::getServiceManager());
     if ($request === null) {
         $request = DatatableRequest::fromGlobals();
     }
     $this->request = $request;
 }