--- /dev/null
+/**
+ * @file
+ * A Backbone Model for collapsible menus.
+ */
+
+(function (Backbone, Drupal) {
+ /**
+ * Backbone Model for collapsible menus.
+ *
+ * @constructor
+ *
+ * @augments Backbone.Model
+ */
+ Drupal.toolbar.MenuModel = Backbone.Model.extend(/** @lends Drupal.toolbar.MenuModel# */{
+
+ /**
+ * @type {object}
+ *
+ * @prop {object} subtrees
+ */
+ defaults: /** @lends Drupal.toolbar.MenuModel# */{
+
+ /**
+ * @type {object}
+ */
+ subtrees: {},
+ },
+ });
+}(Backbone, Drupal));