static java.util.Timer doLater_daemon(long delay, final O r) {
  final java.util.Timer timer = new java.util.Timer(true);
  timer.schedule(timerTask(r, timer), delay);
  ret timer;
}

static java.util.Timer doLater_daemon(double delaySeconds, final O r) {
  ret doLater_daemon(toMS(delaySeconds), r);
}