Description In order to allow construction from a GtkBuilder UI description, an object class must implement the GtkBuildable interface. The interface includes methods for setting names and properties of objects, parsing custom tags, constructing child objects. The GtkBuildable interface is implemented by all widgets and many of the non-widget objects that are provided by GTK+. The main user of this interface is GtkBuilder, there should be very little need for applications to call any gtk_buildable_... functions.