gtk/combo_box.go
func (v *ComboBox) GetModel() (*TreeModel, error) {
	c := C.gtk_combo_box_get_model(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTreeModel(obj), nil
}
func (v *ComboBox) GetModel() (*TreeModel, error) {
	c := C.gtk_combo_box_get_model(v.native())
	if c == nil {
		return nil, nilPtrErr
	}
	obj := glib.Take(unsafe.Pointer(c))
	return wrapTreeModel(obj), nil
}
// GetModel is a wrapper around gtk_combo_box_get_model().