public function group()
    {
        $namespace = \Reaction::$app->router->getRelativeControllerNamespace(static::class);
        $namespace = substr($namespace, 0, -10);
        $namespaceArray = explode('\\', $namespace);
        array_walk($namespaceArray, function(&$value) {
            $value = Inflector::camel2id($value, '-');
        });
        return implode('/', $namespaceArray);
    }