code: public function init() {
  
  		parent::init();
  
  		// Permission
  		$this->crudPermission = NewsletterGlobal::PERM_NEWSLETTER_ADMIN;
  
  		// Services
  		$this->modelService = Yii::$app->factory->get( 'newsletterService' );
  	}
docs: Constructor and Initialisation ------------------------------