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

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