/**
  * OVERRIDE: Back-end widget form.
  *
  * @see WP_Widget::form()
  *
  * @param array $instance Previously saved values from database.
  */
 public function form($instance)
 {
     // $instance['image'] should be a media['ID'], but due to
     // https://github.com/proudcity/wp-proudcity/issues/436
     // Old values may be [featured-image]
     // Set new value 'featured_image' if that is the case
     if (!empty($instance['image']) && $instance['image'] === '[featured-image]') {
         $instance['featured_image'] = 'yes';
     }
     parent::form($instance);
 }