code: public Observable<ServiceResponse<Page<GeoRegionInner>>> listGeoRegionsWithServiceResponseAsync(final SkuName sku, final Boolean linuxWorkersEnabled) {
          return listGeoRegionsSinglePageAsync(sku, linuxWorkersEnabled)
              .concatMap(new Func1<ServiceResponse<Page<GeoRegionInner>>, Observable<ServiceResponse<Page<GeoRegionInner>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<GeoRegionInner>>> call(ServiceResponse<Page<GeoRegionInner>> page) {
                      String nextPageLink = page.body().nextPageLink();
                      if (nextPageLink == null) {
                          return Observable.just(page);
                      }
                      return Observable.just(page).concatWith(listGeoRegionsNextWithServiceResponseAsync(nextPageLink));
                  }
              });
      }
docs: Get a list of available geographical regions.
  Get a list of available geographical regions.
  
  @param sku Name of SKU used to filter the regions. Possible values include: 'Free', 'Shared', 'Basic', 'Standard', 'Premium', 'Dynamic', 'Isolated', 'PremiumV2'
  @param linuxWorkersEnabled Specify &lt;code&gt;true&lt;/code&gt; if you want to filter to only regions that support Linux workers.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;GeoRegionInner&gt; object