code: public Observable<Page<IotHubSkuDescriptionInner>> getValidSkusAsync(final String resourceGroupName, final String resourceName) {
          return getValidSkusWithServiceResponseAsync(resourceGroupName, resourceName)
              .map(new Func1<ServiceResponse<Page<IotHubSkuDescriptionInner>>, Page<IotHubSkuDescriptionInner>>() {
                  @Override
                  public Page<IotHubSkuDescriptionInner> call(ServiceResponse<Page<IotHubSkuDescriptionInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Get the list of valid SKUs for an IoT hub.
  Get the list of valid SKUs for an IoT hub.
  
  @param resourceGroupName The name of the resource group that contains the IoT hub.
  @param resourceName The name of the IoT hub.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;IotHubSkuDescriptionInner&gt; object