static <A> AutoCloseable vmBus_onMessages(Cl<S> messages, Runnable r) {
  ret combineAutoCloseables(map(messages, msg -> vmBus_onMessage(msg, r)));
}

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