public function loadProduct()
 {
     foreach ($this->loadRaw('Product') as $key => $data) {
         $entity = new Product();
         $entity->setName($data['name']);
         $entity->setUser($this->getReference($data['user']));
         foreach ($data['likers'] as $user) {
             $entity->addLiker($this->getReference($user));
         }
         $this->addReference($key, $entity);
         $this->manager->persist($entity);
     }
 }