models/classes/runner/RunnerParamParserTrait.php
protected function getItemRef($itemIdentifier)
    {
        $serviceContext = $this->getServiceContext();
        /** @var QtiRunnerMap $mapService */
        $mapService = $this->getServiceLocator()->get(QtiRunnerMap::SERVICE_ID);
        return $mapService->getItemHref($serviceContext, $itemIdentifier);
    }
protected function getItemRef($itemIdentifier)
    {
        $serviceContext = $this->getServiceContext();
        /** @var QtiRunnerMap $mapService */
        $mapService = $this->getServiceLocator()->get(QtiRunnerMap::SERVICE_ID);
        return $mapService->getItemHref($serviceContext, $itemIdentifier);
    }
Gets the item reference for the current itemRef

@param string $itemIdentifier the item id
@return string the state id