static long nextScheduledGC() {
  for (java.util.Timer timer : _registeredTimersOf(getJavaX())) {
    L entries = cast get(timer, 'entries);
    for (O entry : entries) {
      O task = get(entry, 'task);
      O runnable = getOpt(task, 'r);
      if (isString(runnable) && startsWith(runnable/S, "regularGC")) {
        long firstTime = getLong(entry, 'firstTime);
        long period = getLong(entry, 'period);
        long now = now();
        long elapsed = mod(now-firstTime, period);
        ret now-elapsed+period;
      }
    }
  }
  ret 0;
}