AttributeBundle example

if ($containerBuilder->hasExtension($key)) {
                    $containerBuilder->loadFromExtension($key, $values);
                }
            }
        });
    }

    public function registerBundles(): array
    {
        return [
            new AccountBundle(),
            new AttributeBundle(),
            new CookieBundle(),
            new ContentTypeBundle(),
            new ControllerBundle(),
            new CustomerSearchBundleDBALBundle(),
            new EmotionBundle(),
            new EsBackendBundle(),
            new ESIndexingBundle(),
            new FormBundle(),
            new MailBundle(),
            new MediaBundle(),
            new PluginInstallerBundle(),