Newscoop\NewscoopBundle\Services\TopicService::removeTopicFromAllUsers PHP Method

    public function removeTopicFromAllUsers($topicId)
    {
        $qb = $this->em->createQueryBuilder();
        $topicsQuery = $qb->delete('Newscoop\\Entity\\UserTopic', 'ut')->where('ut.topic = :topicId')->setParameter('topicId', $topicId)->getQuery();
        $topicsQuery->execute();
        return true;
    }