code: public ServiceFuture<LoadBalancerInner> createOrUpdateAsync(String resourceGroupName, String loadBalancerName, LoadBalancerInner parameters, final ServiceCallback<LoadBalancerInner> serviceCallback) {
          return ServiceFuture.fromResponse(createOrUpdateWithServiceResponseAsync(resourceGroupName, loadBalancerName, parameters), serviceCallback);
      }
docs: Creates or updates a load balancer.
  
  @param resourceGroupName The name of the resource group.
  @param loadBalancerName The name of the load balancer.
  @param parameters Parameters supplied to the create or update load balancer 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