// However, we are sticking to v2 for now, so categorybag doesn't
// exist under FindBinding. It is fine for now, since the incoming
// parameter value is always null anyways -- but this may change
// in the future.
FindBindingDocument doc = FindBindingDocument.Factory.newInstance();
FindBinding request = doc.addNewFindBinding();
if (serviceKey != null) {
request.setServiceKey(serviceKey);
}