@Override
  public boolean isAfter(ChronoZonedDateTime<?> other) {

    long thisEpochSec = toEpochSecond();
    long otherEpochSec = other.toEpochSecond();
    return thisEpochSec > otherEpochSec
        || (thisEpochSec == otherEpochSec && getTime().getNano() > other.getTime().getNano());
  }