public function renderToggleButton($content, $options = [])
 {
     if (!isset($options['id'])) {
         $options['id'] = $this->getId() . '-button';
     }
     $this->getView()->registerJs('
     jQuery("#' . $options['id'] . '").on("click", function(event) {
         event.preventDefault();
         jQuery("#' . $this->getId() . '").modal("show");
     });
     ');
     return Elements::button($content, $options);
 }