UpdateRegistryFactory.php

<?php

namespace Drupal\Core\Update;

use Symfony\Component\DependencyInjection\ContainerAwareInterface;
use Symfony\Component\DependencyInjection\ContainerAwareTrait;

/**
 * Service factory for the update registry.
 */
class UpdateRegistryFactory implements ContainerAwareInterface {
    use ContainerAwareTrait;
    
    /**
     * Creates a new UpdateRegistry instance.
     *
     * @return \Drupal\Core\Update\UpdateRegistry
     *   The update registry instance.
     */
    public function create() {
        $extensions = array_merge(array_keys($this->container
            ->get('module_handler')
            ->getModuleList()), array_keys($this->container
            ->get('theme_handler')
            ->listInfo()));
        return new UpdateRegistry($this->container
            ->getParameter('app.root'), $this->container
            ->getParameter('site.path'), $extensions, $this->container
            ->get('keyvalue')
            ->get('post_update'));
    }

}