public <TResult> Iterable<TResult> distinct(String fieldName, Class<TResult> tResultClass) {
        return delegate.distinct(fieldName, tResultClass);
    }
@Test
    void distinct() {
        final var collection = jacksonCollection("simple", Simple.class);
        final List<Simple> items = List.of(
                new Simple("000000000000000000000001", "foo"),
                new Simple("000000000000000000000002", "bar")
        );
        collection.insert(items);
    }