code: public ServiceFuture<List<String>> listWebAppsByHybridConnectionAsync(final String resourceGroupName, final String name, final String namespaceName, final String relayName, final ListOperationCallback<String> serviceCallback) {
          return AzureServiceFuture.fromPageResponse(
              listWebAppsByHybridConnectionSinglePageAsync(resourceGroupName, name, namespaceName, relayName),
              new Func1<String, Observable<ServiceResponse<Page<String>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<String>>> call(String nextPageLink) {
                      return listWebAppsByHybridConnectionNextSinglePageAsync(nextPageLink);
                  }
              },
              serviceCallback);
      }
docs: Get all apps that use a Hybrid Connection in an App Service Plan.
  Get all apps that use a Hybrid Connection in an App Service Plan.
  
  @param resourceGroupName Name of the resource group to which the resource belongs.
  @param name Name of the App Service plan.
  @param namespaceName Name of the Hybrid Connection namespace.
  @param relayName Name of the Hybrid Connection relay.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object