return value;
    }
    return load(key);
  }

  @SuppressWarnings("GoodTime") // timestamps as numeric primitives
  private static class Timestamped<V> {
    private final V value;
    private final Ticker ticker;
    private long writeTimestamp;
    private long accessTimestamp;

    public Timestamped(V value, Ticker ticker) {
      this.value = checkNotNull(value);
      this.ticker = checkNotNull(ticker);