Ojs\CoreBundle\Service\DeleteService::preDelete PHP Метод

    private function preDelete()
    {
        if (!count($this->preDelete)) {
            return true;
        }
        foreach ($this->preDelete as $usage) {
            $findRelations = $this->findRelations($usage);
            if (count($findRelations) > 0) {
                foreach ($findRelations as $relation) {
                    $this->em->remove($relation);
                }
            }
        }
        $this->em->flush();
        return true;
    }