code: public ServiceFuture<IotHubDescriptionInner> beginUpdateAsync(String resourceGroupName, String resourceName, final ServiceCallback<IotHubDescriptionInner> serviceCallback) {
          return ServiceFuture.fromResponse(beginUpdateWithServiceResponseAsync(resourceGroupName, resourceName), serviceCallback);
      }
docs: Update an existing IoT Hubs tags.
  Update an existing IoT Hub tags. to update other fields use the CreateOrUpdate method.
  
  @param resourceGroupName Resource group identifier.
  @param resourceName Name of iot hub to update.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object