framework/widgets/BaseListView.php
public function run()
    {
        if ($this->showOnEmpty || $this->dataProvider->getCount() > 0) {
            $content = preg_replace_callback('/{\\w+}/', function ($matches) {
                $content = $this->renderSection($matches[0]);

                return $content === false ? $matches[0] : $content;
            }, $this->layout);
        } else {
            $content = $this->renderEmpty();
        }

        $options = $this->options;
        $tag = ArrayHelper::remove($options, 'tag', 'div');
        echo Html::tag($tag, $content, $options);
    }
public function run()
    {
        if ($this->showOnEmpty || $this->dataProvider->getCount() > 0) {
            $content = preg_replace_callback('/{\\w+}/', function ($matches) {
                $content = $this->renderSection($matches[0]);

                return $content === false ? $matches[0] : $content;
            }, $this->layout);
        } else {
            $content = $this->renderEmpty();
        }

        $options = $this->options;
        $tag = ArrayHelper::remove($options, 'tag', 'div');
        echo Html::tag($tag, $content, $options);
    }
Runs the widget.