code: func (ps *PrintSettings) LoadFile(name string) error {
  	cstr := C.CString(name)
  	defer C.free(unsafe.Pointer(cstr))
  	var err *C.GError = nil
  	c := C.gtk_print_settings_load_file(ps.native(), (*C.gchar)(cstr), &err)
  	if gobool(c) == false {
  		defer C.g_error_free(err)
  		return errors.New(C.GoString((*C.char)(err.message)))
  	}
  	return nil
  }
docs: // PrintSettingsNewFromKeyFile() is a wrapper around gtk_print_settings_new_from_key_file().
  // LoadFile() is a wrapper around gtk_print_settings_load_file().