useQueue example

if ($this->working) {
            return;
        }
        $this->working = true;

        if ($this->disabled($context)) {
            $this->working = false;

            return;
        }

        $useQueue = $this->useQueue($context);

        foreach ($this->indexer as $indexer) {
            $message = $indexer->update($event);

            if (!$message) {
                continue;
            }

            $message->setIndexer($indexer->getName());
            self::addSkips($message, $context);