private function init_theme_providers()
    {
        foreach (Config::get('services.theme_providers') as $class_name) {
            if (\is_subclass_of($class_name, \Snap\Services\Service_Provider::class)) {
                $provider = Container::resolve($class_name);
                Container::resolve_method($provider, 'register');
                return;
            }
        }
    }