Laravel-modules 如何配置及加载语言包?

Question

文档中未看明白, https://nwidart.com/laravel-m...

 $langPath = base_path('resources/lang/modules/blog');

if (is_dir($langPath)) {
    $this->loadTranslationsFrom($langPath, 'blog');
} else {
    $this->loadTranslationsFrom(__DIR__ .'/../Resources/lang', 'blog');
}

文档中的这段代码是要加到哪个文件中的?