public function process(ContainerBuilder $container)
    {
        $configs = $container->getExtensionConfig('nova_ezseo');

        //@todo: How to do that by SiteAccess
        if (isset($configs[0]['system']['default']['custom_fallback_service'])) {
            $fallbackService = $configs[0]['system']['default']['custom_fallback_service'];
            if ($fallbackService !== null) {
                $container->getDefinition('novactive.novaseobundle.twig_extension')->addMethodCall(
                    "setCustomFallbackService",
                    [new Reference($fallbackService)]
                );
            }
        }
    }