protected function postProcessIndexQueueUpdateItem($itemType, $itemUid, $updateCount, $forcedChangeTime = 0)
    {
        if (!is_array($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['solr']['postProcessIndexQueueUpdateItem'])) {
            return $updateCount;
        }

        foreach ($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['solr']['postProcessIndexQueueUpdateItem'] as $classReference) {
            $updateHandler = $this->getHookImplementation($classReference);
            $updateCount = $updateHandler->postProcessIndexQueueUpdateItem($itemType, $itemUid, $updateCount, $forcedChangeTime);
        }

        return $updateCount;
    }