if (!Modifier.isPrivate(method.getModifiers()) && !Modifier.isStatic(method.getModifiers()) && !method.isSynthetic() && !GroovyMethods.isObjectMethod(method)) {
            problems.add(method, "A method that is not annotated as a rule must be private");
        }
    }

    private static class ConcreteRuleSourceFactory<T> implements Factory<T> {