gtk/combo_box.go
func (v *ComboBox) GetActiveIter() (*TreeIter, error) {
	var cIter C.GtkTreeIter
	c := C.gtk_combo_box_get_active_iter(v.native(), &cIter)
	if !gobool(c) {
		return nil, errors.New("unable to get active iter")
	}
	return &TreeIter{cIter}, nil
}
func (v *ComboBox) GetActiveIter() (*TreeIter, error) {
	var cIter C.GtkTreeIter
	c := C.gtk_combo_box_get_active_iter(v.native(), &cIter)
	if !gobool(c) {
		return nil, errors.New("unable to get active iter")
	}
	return &TreeIter{cIter}, nil
}
// GetActiveIter is a wrapper around gtk_combo_box_get_active_iter().