macgyer\yii2materializecss\widgets\Nav::init PHP Method

    public function init()
    {
        parent::init();
        if ($this->route === null && Yii::$app->controller !== null) {
            $this->route = Yii::$app->controller->getRoute();
        }
        if ($this->params === null) {
            $this->params = Yii::$app->request->getQueryParams();
        }
        if ($this->dropDownCaret === null) {
            $this->dropDownCaret = Html::tag('i', 'arrow_drop_down', ['class' => 'material-icons right']);
        }
    }