protected function getLang($name, $default = null, $extras = [])
    {
        $name = $this->getConfig($name, $default);
        $vars = [
            'name' => Lang::get($this->getConfig('name', 'backend::lang.model.name'))
        ];
        $vars = array_merge($vars, $extras);
        return Lang::get($name, $vars);
    }