}

    static trait SimpleProgress {
        String output() { "output" }
    }

    static trait SimpleResult {
        String simpleResultMethod() { "simpleResultValue" }
    }

    static trait NestedResult {
        Nested getNested() { new Object().withTraits(Nested) }
    }

    static trait Nested {
        String getNestedValue() { "nestedValue" }