gtk/gtk.go
func SpinButtonNew(adjustment *Adjustment, climbRate float64, digits uint) (*SpinButton, error) {
	c := C.gtk_spin_button_new(adjustment.native(),
		C.gdouble(climbRate), C.guint(digits))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapSpinButton(glib.Take(unsafe.Pointer(c))), nil
}
func SpinButtonNew(adjustment *Adjustment, climbRate float64, digits uint) (*SpinButton, error) {
	c := C.gtk_spin_button_new(adjustment.native(),
		C.gdouble(climbRate), C.guint(digits))
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapSpinButton(glib.Take(unsafe.Pointer(c))), nil
}
// SpinButtonNew() is a wrapper around gtk_spin_button_new().