Dúvida simples: VRaptor 3 - Validations [RESOLVIDO]

public void add(Product product) {
        validator.checking(new Validations() {{
            that(!product.getName().isEmpty(), "product.name", "nome.empty");
            that(product.getPrice() > 0, "product.price", "price.invalid");
        }});
        validator.onErrorUsePageOf(ProductController.class).form();
       
        dao.save(product);
        result.redirectTo(ProductController.class).list();
    }

C:\projetos\jprodvr\src\org\timsoft\jprodvr\controller\ProductController.java:37: local variable product is accessed from within inner class; needs to be declared final
            that(!product.getName().isEmpty(), "product.name", "nome.empty");