code: public OperationFuture<List<Server>> removeSecondaryNetwork(List<Server> servers, Network network) {
          List<JobFuture> futures = servers.stream()
              .map(server -> removeSecondaryNetwork(server, network).jobFuture())
              .collect(toList());
  
          return new OperationFuture<>(
              servers,
              new ParallelJobsFuture(futures)
          );
      }
docs: Remove secondary network
  
  @param servers server references
  @param network secondary network reference
  @return OperationFuture wrapper for list of Server