protected function handleSolrUnavailable()
    {
        if ($this->typoScriptConfiguration->getLoggingExceptions()) {
            /** @var SolrLogManager $logger */
            $logger = GeneralUtility::makeInstance(SolrLogManager::class, /** @scrutinizer ignore-type */ __CLASS__);
            $logger->log(SolrLogManager::ERROR, 'Solr server is not available');
        }
    }