public function findById(int $id)
    {
        $entity = null;

        for ($i = 0; $i < count($this->registries); $i++) {
            /** @var RegistryInterface $registry */
            $registry = $this->registries[ $i ];
            $entity = $registry->findByKey($id);

            if ($entity instanceof AbstractEntity) {
                $this->updateRegistries([$entity], $i - 1);
                break;
            }
        }

        return $entity;
    }