@Override
    public String toString() {
        return super.toString() + " " + toString(wrapped.getConstraintViolations());
    }

    private static String toString(Set<ConstraintViolation<?>> constraintViolations) {
        StringBuilder sb = new StringBuilder();
        for (ConstraintViolation<?> constraintViolation : constraintViolations) {
        sb.append("Violation for property ").append(constraintViolation.getPropertyPath()).append(": ")
                .append(constraintViolation.getMessage());
        }
        return sb.toString();
    }