Sulu\Bundle\ContactBundle\Contact\AbstractContactManager::setMainFax PHP Метод

    public function setMainFax($entity)
    {
        // set main to first entry or to null
        if ($entity->getFaxes()->isEmpty()) {
            $entity->setMainFax(null);
        } else {
            $entity->setMainFax($entity->getFaxes()->first()->getFax());
        }
    }