- * @cfg {jQuery} [$overlay] Render the menu into a separate layer. This configuration is useful
- * in cases where the expanded menu is larger than its containing `<div>`. The specified overlay
- * layer is usually on top of the containing `<div>` and has a larger area. By default, the menu
- * uses relative positioning.
+ * @cfg {jQuery|boolean} [$overlay] Render the menu into a separate layer. This configuration is
+ * useful in cases where the expanded menu is larger than its containing `<div>`. The specified
+ * overlay layer is usually on top of the containing `<div>` and has a larger area. By default,
+ * the menu uses relative positioning. Pass 'true' to use the default overlay.