code: public OperationFuture<List<LoadBalancer>> update(
              LoadBalancerFilter loadBalancerFilter,
              LoadBalancerConfig config
      ) {
          checkNotNull(loadBalancerFilter, "Load balancer filter must be not null");
  
          List<LoadBalancer> loadBalancerList = findLazy(loadBalancerFilter)
                  .map(metadata -> LoadBalancer.refById(
                      metadata.getId(),
                      DataCenter.refById(metadata.getDataCenterId())
                  ))
                  .collect(toList());
  
          return update(loadBalancerList, config);
      }
docs: Update filtered load balancers
  
  @param loadBalancerFilter load balancer filter
  @param config load balancer config
  @return OperationFuture wrapper for load balancer list