[ Version ( since = "3.6" ) ]
public void insert_action_group (string name, ActionGroup? group)
Inserts group into this.
Children of this that implement Actionable can
then be associated with actions in group by setting their “action-name” to prefix.`action-name`.
If group is null, a previously inserted group for name is removed from
this.
| this |
a Widget |
| name |
the prefix for actions in |
| group |
a ActionGroup, or null |