code: public Observable<ServiceResponse<Page<NameIdentifierInner>>> listRecommendationsWithServiceResponseAsync(final DomainRecommendationSearchParameters parameters) {
          return listRecommendationsSinglePageAsync(parameters)
              .concatMap(new Func1<ServiceResponse<Page<NameIdentifierInner>>, Observable<ServiceResponse<Page<NameIdentifierInner>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<NameIdentifierInner>>> call(ServiceResponse<Page<NameIdentifierInner>> page) {
                      String nextPageLink = page.body().nextPageLink();
                      if (nextPageLink == null) {
                          return Observable.just(page);
                      }
                      return Observable.just(page).concatWith(listRecommendationsNextWithServiceResponseAsync(nextPageLink));
                  }
              });
      }
docs: Get domain name recommendations based on keywords.
  Get domain name recommendations based on keywords.
  
  @param parameters Search parameters for domain name recommendations.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;NameIdentifierInner&gt; object