kartik\tree\TreeView::initSelectedNode PHP Méthode

    protected function initSelectedNode()
    {
        $session = Yii::$app->session;
        $id = $this->_nodeSelected ? $this->_nodeSelected : 'kvNodeId';
        $nodeSelected = $session->get($id, '');
        if (!empty($nodeSelected)) {
            $this->displayValue = $nodeSelected;
            $session->set($id, '');
        }
    }