code: func MenuItemNew(label, detailed_action string) *MenuItem {
  	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 := C.g_menu_item_new(cstr1, cstr2)
  	if c == nil {
  		return nil
  	}
  	return wrapMenuItem(wrapObject(unsafe.Pointer(c)))
  }
docs: // MenuItemNew is a wrapper around g_menu_item_new().