public int hashCode() {
            return Objects.hashCode(displayName);
        }
    }

    private static class TwoPartDescribable extends AbstractDescribable {
        private final Object part1;
        private final Object part2;

        TwoPartDescribable(Object part1, Object part2) {
            this.part1 = part1;
            this.part2 = part2;
        }

        @Override