public Map<String, OptionDescriptor> getOptions(Object target) {
        final Class<?> targetClass = target.getClass();
        Map<String, OptionDescriptor> options = new HashMap<String, OptionDescriptor>();
        if (!cachedOptionElements.containsKey(targetClass)) {
            loadClassDescriptorInCache(target);
        }

        options[13].argumentType == String
        options[13].availableValues == ["dynValue1", "dynValue2"] as Set
    }

    def "built-in options appear last"() {
        when:
        List<OptionDescriptor> options = TaskOptionsGenerator.generate(new TestClassWithProperties(), reader).getAll()
        int ownOptions = 14
        then:
        options.forEach {it -> System.out.println(it.name + " " + it.description)}