MailBundle example

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(),
            new SearchBundle(),
            new SearchBundleDBAL(),
            new SearchBundleES(),
            new SitemapBundle(),
            new StaticContentBundle(),
            new StoreFrontBundle(),
            new OrderBundle(),
        ];
    }