gtk/combo_box.go
func (v *ComboBox) SetActive(index int) {
	C.gtk_combo_box_set_active(v.native(), C.gint(index))
}
func (v *ComboBox) SetActive(index int) {
	C.gtk_combo_box_set_active(v.native(), C.gint(index))
}
// SetActive() is a wrapper around gtk_combo_box_set_active().