// vmProg = vm program to start if vmName is not found
static O evalInCertainVM(S vmName, S vmProg, S java) {
  vmName = "This is a JavaX VM. " + vmName;
  startBotSeparateVM(vmName, vmProg);
  S cmd = format("very quick java *", java);
  ret safeUnstructure(matchOK(sendToLocalBot(vmName, cmd)));
}