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.