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