private function renderItems()
    {
        $items = [];
        $icons = $this->icons['items'];
        foreach($icons as $i){
            $labelContent = $i['label'];
            if ($this->encodeLabel) {
                $labelContent = Html::encode($labelContent);
            }
            $label = Html::tag('label',$labelContent)."\n";
            
            $icon = Html::tag('i','',['class'=>$i['icon']])."\n";
            
            $options = ArrayHelper::getValue($i, 'options', []);
            
            if(isset($options['class'])){
                $addClass = 'item '.$options['class'];
                $options = [
                    'class' => $addClass,
                ];
            }else{
                $options['class'] = 'item';
            }
            
            $url = $i['url'];
            $items[] = Html::a($icon.$label,$url,$options)."\n";
        }
        return implode("\n", $items);
    }