static class Injection {
  int vmPort;
  S injectionID;
}

static L<Injection> injectToAll(S progID) {
  new L<Injection> l;
  
  S line = format3("Please inject program *.", progID);
  
  for (DialogIO injectionPoint : talkToAll("This is a JavaX VM."))
    try {
      injectionPoint.readLine();
      S answer = injectionPoint.askLoudly(line);
      new Matches m;
      if (match3("OK. Injection ID: *", answer, m)) {
        new Injection i;
        i.vmPort = injectionPoint.getSocket().getPort();
        i.injectionID = m.unq(0);
        l.add(i);
      } // just ignore for now if bad result
    } finally {
      injectionPoint.close();
    }
    
  ret l;
}