Calls the complete_interface_info function from the GTypePluginClass of plugin. There should be no need to use this function outside of the GObject type system itself.
the GType of an instantiable type to which the interface is added
the GType of the interface whose info is completed
the GInterfaceInfo to fill in
Calls the complete_interface_info function from the GTypePluginClass of plugin. There should be no need to use this function outside of the GObject type system itself.