expire method

@override Future<void> expire(String key)

Implementation

@override
Future<void> expire(String key) async {
  checkInitialized();

  int? expiry = data.remove(key);
  if (expiry == null) {
    return;
  }
  // print('Expiring $key');
  onExpire.broadcast(ExpirationEvent(target: key, expiry: expiry));
  await persist();
}