private function _registerAssets()
    {
        if ($this->frontendTranslationAsset) {
            Yii::$app->view->registerAssetBundle($this->frontendTranslationAsset);
        }

        if ($this->frontendTranslationPluginAsset) {
            Yii::$app->view->registerAssetBundle($this->frontendTranslationPluginAsset);
        }
    }