ifclass VF2
static <A> AutoCloseable vmBus_onMessages(Collection<S> messages, final VF2<S, ?> r) {
  final Set<S> set = asSet(messages);
  ret tempAdd(vm_busListeners_live(), voidfunc(S msg, O arg) {
    if (contains(set, msg))
      callF(r, msg, arg);
  });
}
endif

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