WebClient send multiple query same name

[Matthew Broadhead]

cxf-core-3.1.10.jar (TomEE 7.0.3)

I am trying to access an endpoint which says it wants multiple id number 
parameters like.  the documentation says this is allowed in http?
https://example.com/test?id=123&id=456&id=789
i tried the following
WebClient webClient = WebClient.create(baseAddress);
List<Integer> ids = selectList();
// test 1
for (Integer id : ids) {
        webClient.query("id", id);
}
// test 2
webClient.query("id", ids);
// test 3
webClient.query("id", ids.toArray(new Integer[ids.size()]));