code: protected function createInstance(CreateMetaModelEvent $event, $arrData)
      {
          if (!$this->createInstanceViaLegacyFactory($event, $arrData)) {
              $metaModel = new MetaModel($arrData, $this->dispatcher, $this->database);
              $metaModel->setServiceContainer(function () {
                  return $this->getServiceContainer();
              }, false);
              $event->setMetaModel($metaModel);
          }
  
          if ($event->getMetaModel()) {
              $this->instancesByTable[$event->getMetaModelName()]     = $event->getMetaModel();
              $this->instancesById[$event->getMetaModel()->get('id')] = $event->getMetaModel();
          }
      }
docs: Create a MetaModel instance with the given information.
  
  @param CreateMetaModelEvent $event   The event.
  
  @param array                $arrData The meta information for the MetaModel.
  
  @return void