code: public OperationFuture<List<LoadBalancer>> update(
              List<LoadBalancer> loadBalancerList,
              LoadBalancerConfig config
      ) {
          loadBalancerList.forEach(loadBalancer -> update(loadBalancer, config));
  
          return new OperationFuture<>(
              loadBalancerList,
              new NoWaitingJobFuture()
          );
      }
docs: Update load balancer list
  
  @param loadBalancerList load balancer list
  @param config load balancer config
  @return OperationFuture wrapper for load balancer list