glib/menu.go
func (v *Menu) Prepend(label, detailed_action string) {
	cstr1 := (*C.gchar)(C.CString(label))
	defer C.free(unsafe.Pointer(cstr1))

	cstr2 := (*C.gchar)(C.CString(detailed_action))
	defer C.free(unsafe.Pointer(cstr2))

	C.g_menu_prepend(v.native(), cstr1, cstr2)
}
func (v *Menu) Prepend(label, detailed_action string) {
	cstr1 := (*C.gchar)(C.CString(label))
	defer C.free(unsafe.Pointer(cstr1))

	cstr2 := (*C.gchar)(C.CString(detailed_action))
	defer C.free(unsafe.Pointer(cstr2))

	C.g_menu_prepend(v.native(), cstr1, cstr2)
}
// Prepend is a wrapper around g_menu_prepend().