/** How long after the last write an entry becomes a candidate for refresh. */
  final long refreshNanos;

  /** Entries waiting to be consumed by the removal listener. */
  // TODO(fry): define a new type which creates event objects and automates the clear logic
  final Queue<RemovalNotification<K, V>> removalNotificationQueue;

  /**
   * A listener that is invoked when an entry is removed due to expiration or garbage collection of

    return failure;
  }

  // This test covers a bug where an Error thrown from a callback could cause the TimeoutFuture to
  // never complete when timing out.  Notably, nothing would get logged since the Error would get
  // stuck in the ScheduledFuture inside of TimeoutFuture and nothing ever calls get on it.

  // Simulate a timeout that fires before the call the SES.schedule returns but the future is
  // already completed.

    return failure;
  }

  // This test covers a bug where an Error thrown from a callback could cause the TimeoutFuture to
  // never complete when timing out.  Notably, nothing would get logged since the Error would get
  // stuck in the ScheduledFuture inside of TimeoutFuture and nothing ever calls get on it.

  // Simulate a timeout that fires before the call the SES.schedule returns but the future is
  // already completed.