GtkWidget *radio_get_nth_widget (GtkContainer *container, gint nth);
gint radio_get_active (GtkContainer *container);
void radio_set_active (GtkContainer *container, gint active);
GtkWidget *radio_get_nth_widget (GtkContainer *container, gint nth);
gint radio_get_active (GtkContainer *container);
void radio_set_active (GtkContainer *container, gint active);