public static function setStopLock($crawler, $flag = TRUE)
 {
     $stop = TRUE;
     if (!$flag) {
         $stop = FALSE;
     }
     Configuration::setCoreSetting('forceStop', $stop);
 }
 /**
  * @param string $crawler frontend | backend
  * @return void
  */
 public static function forceCrawlerStartOnNextMaintenance($crawler)
 {
     Configuration::setCoreSetting('forceStart', TRUE);
     \Pimcore\Logger::debug('LuceneSearch: forced to starting crawl');
 }