[ Version ( since = "2.20" ) ]
public void set_action_widget (Widget widget, PackType pack_type)
Sets widget as one of the action widgets.
Depending on the pack type the widget will be placed before or after the tabs. You can use a `GtkBox` if you need to pack more than one widget on the same side.
| this |
a `GtkNotebook` |
| widget |
a `GtkWidget` |
| pack_type |
pack type of the action widget |