settings.setSPValidationOnly(true);
                final String metadata = settings.getSPMetadata();
                final List<String> errors = Saml2Settings.validateMetadata(metadata);
                if (!errors.isEmpty()) {
                    final String msg = errors.stream().collect(Collectors.joining(", "));
                    throw new SsoMessageException(

func RegisterValidateFunc(name string, f ValidateFunc) ValidateFunc {
	// Wrap the original validate function with an extra validate function for object metadata
	validate := validateMetadata(f)
	validateFuncs[name] = validate
	return validate
}

func validateMetadata(f ValidateFunc) ValidateFunc {
	return func(config config.Config) (Warning, error) {
		// Check the annotation "istio.io/dry-run".