/** Requests with optional paging require an extra "ds3_paging" member */
 public static ImmutableSet<String> getPaginatedTypes(final Ds3ApiSpec spec) {
   return spec.getRequests()
       .stream()
       .filter(Ds3RequestClassificationUtil::supportsPaginationRequest)
       .map(req -> RequestConverter.getResponseType(req.getDs3ResponseCodes()))
       .collect(GuavaCollectors.immutableSet());
 }