public static <R, T> RuleSourceBackedRuleAction<R, T> create(ModelType<T> subjectType, R ruleSourceInstance) {
        ModelType<R> ruleSourceType = ModelType.typeOf(ruleSourceInstance);
        List<Method> mutateMethods = findAllMethods(ruleSourceType.getConcreteClass(), element -> element.isAnnotationPresent(Mutate.class));
        FormattingValidationProblemCollector problemsFormatter = new FormattingValidationProblemCollector("rule source", ruleSourceType);