master/artweb/artbox-core/views/page/_gallery.php

<?php
    
    use artbox\core\models\Page;
    use artbox\core\widgets\GalleryWidget;
    use yii\web\View;
    
    /**
     * @var View $this
     * @var Page $model
     */
?>
<?php
    echo GalleryWidget::widget(
        [
            'model' => $model,
        ]
    );
?>