https://bugzilla.gnome.org/show_bug.cgi?id=670369
* @parent: (allow-none): a #GdkWindow, or %NULL to create the window as a child of
* the default root window for the default display.
* @attributes: attributes of the new window
- * @attributes_mask: mask indicating which fields in @attributes are valid
+ * @attributes_mask: (type GdkWindowAttributesType): mask indicating which
+ * fields in @attributes are valid
*
* Creates a new #GdkWindow using the attributes from
* @attributes. See #GdkWindowAttr and #GdkWindowAttributesType for