sclass ComputerCountListener(StefansOS_ConnectToServer connector) {
  new VarWithNotify<Int> computerCount;
  
  void init {
    connector.onLine = voidfunc(S line) {
      new Matches m;
      if (swic(line, "ComputerIDs = ", m)) {
        var computerIDs = (LS) safeUnstruct($1);
        computerCount.set(l(computerIDs));
      }
    }
  }
  
  LiveValue<Int> lvComputerCount() { ret varWithNotifyToLiveValue(computerCount); }
}