code: public ServiceFuture<ExpressRouteCircuitInner> createOrUpdateAsync(String resourceGroupName, String circuitName, ExpressRouteCircuitInner parameters, final ServiceCallback<ExpressRouteCircuitInner> serviceCallback) {
          return ServiceFuture.fromResponse(createOrUpdateWithServiceResponseAsync(resourceGroupName, circuitName, parameters), serviceCallback);
      }
docs: Creates or updates an express route circuit.
  
  @param resourceGroupName The name of the resource group.
  @param circuitName The name of the circuit.
  @param parameters Parameters supplied to the create or update express route circuit operation.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object