public function getSearchAdditionalPersistentArgumentNames($defaultIfEmpty = [])
    {
        $additionalPersistentArgumentNames = $this->getValueByPathOrDefaultValue('plugin.tx_solr.search.additionalPersistentArgumentNames', '');

        if ($additionalPersistentArgumentNames === '') {
            return $defaultIfEmpty;
        }

        return GeneralUtility::trimExplode(',', $additionalPersistentArgumentNames, true);

    }