static <A> AutoCloseable vmBus_onMessages_many(Collection<S> messages, final Runnable r) {
  final Set<S> set = asSet(messages);
  ret tempAdd(vm_busListeners_live(), voidfunc(S msg, O arg) {
    if (contains(set, msg))
      callF(r);
  });
}

static <A> AutoCloseable vmBus_onMessages_many(Runnable r, S... messages) {
  ret vmBus_onMessages_many(asHashSet(messages), r);
}

Began life as a copy of #1019006