public function collection_shortcode($atts, $content = null)
 {
     $atts = shortcode_atts(array("id" => 0, "name" => '', "nocache" => false, "mode" => "normal"), $atts);
     $id = intval($atts["id"]);
     $name = sanitize_text_field($atts["name"]);
     if ($id > 0) {
         $collection = maxCollections::getCollectionByID($id);
     } elseif ($atts["name"] != '') {
         $collection = maxCollections::getCollectionByName($name);
     }
     if ($collection) {
         return $collection->shortcode($atts, $content);
     }
 }