function add_cover()
 {
     \Jigsaw::add_column('pugpig_edition', 'Cover Image', function ($pid) {
         $width = 90;
         $height = 120;
         set_post_thumbnail_size($width, $height);
         $cover_html = get_the_post_thumbnail($pid);
         if (empty($cover_html)) {
             $thumbnail = Helper::assetUrl('/img/no-cover.jpg');
             $cover_html = view('@AgreablePugpigPlugin/cover-column.twig', array('width' => $width, 'height' => $height, 'thumbnail' => $thumbnail))->getBody();
         }
         echo $cover_html;
     });
 }