WellCommerce\Bundle\DoctrineBundle\Manager\ManagerInterface::getRepository PHP Method

    public function getRepository() : RepositoryInterface;

 private function findLayoutBox($identifier) : LayoutBoxInterface
 {
     $layoutBox = $this->manager->getRepository()->findOneBy(['identifier' => $identifier]);
     if (!$layoutBox instanceof LayoutBoxInterface) {
         throw new LayoutBoxNotFoundException($identifier);
     }
     return $layoutBox;
 }