Inserts group into widget. Children of widget that implement
#GtkActionable 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 widget.
Inserts group into widget. Children of widget that implement #GtkActionable 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 widget.