.addEqualityGroup(parse("maximumWeight=15"), parse("maximumWeight=15"))
        .addEqualityGroup(parse("expireAfterAccess=60s"), parse("expireAfterAccess=1m"))
        .addEqualityGroup(parse("expireAfterAccess=60m"), parse("expireAfterAccess=1h"))
        .addEqualityGroup(parse("expireAfterWrite=60s"), parse("expireAfterWrite=1m"))

        .addEqualityGroup(parse("maximumWeight=15"), parse("maximumWeight=15"))
        .addEqualityGroup(parse("expireAfterAccess=60s"), parse("expireAfterAccess=1m"))
        .addEqualityGroup(parse("expireAfterAccess=60m"), parse("expireAfterAccess=1h"))
        .addEqualityGroup(parse("expireAfterWrite=60s"), parse("expireAfterWrite=1m"))

   * @throws IllegalStateException if {@link #expireAfterAccess} was already set
   */
  @SuppressWarnings("GoodTime") // should accept a Duration
  @CanIgnoreReturnValue
  public CacheBuilder<K, V> expireAfterAccess(long duration, TimeUnit unit) {
    checkState(
        expireAfterAccessNanos == UNSET_INT,
        "expireAfterAccess was already set to %s ns",
        expireAfterAccessNanos);

    CacheBuilder.newBuilder().expireAfterAccess(1, NANOSECONDS).build(identityLoader());
    // well, it didn't blow up.
  }

  public void testTimeToIdle_setTwice() {
    CacheBuilder<Object, Object> builder =
        CacheBuilder.newBuilder().expireAfterAccess(3600, SECONDS);
    assertThrows(IllegalStateException.class, () -> builder.expireAfterAccess(3600, SECONDS));
  }

  @GwtIncompatible // Duration

    boolean wasEvicted() {
      return true;
    }
  },

  /**
   * The entry's expiration timestamp has passed. This can occur when using {@link
   * CacheBuilder#expireAfterWrite} or {@link CacheBuilder#expireAfterAccess}.
   */
  EXPIRED {
    @Override
    boolean wasEvicted() {
      return true;
    }
  },

  /**
   * The entry was evicted due to size constraints. This can occur when using {@link

        ConcurrentMapTestSuiteBuilder.using(
                new TestStringCacheGenerator(
                    createCacheBuilder()
                        .expireAfterAccess(1, SECONDS)
                        .ticker(new SerializableTicker())))
            .named("LocalCache with expireAfterAccess") // SerializableTicker never advances
            .withFeatures(
                CollectionSize.ANY,
                MapFeature.GENERAL_PURPOSE,

        ConcurrentMapTestSuiteBuilder.using(
                new TestStringCacheGenerator(
                    createCacheBuilder()
                        .expireAfterAccess(1, SECONDS)
                        .ticker(new SerializableTicker())))
            .named("LocalCache with expireAfterAccess") // SerializableTicker never advances
            .withFeatures(
                CollectionSize.ANY,
                MapFeature.GENERAL_PURPOSE,

  private boolean isExpired(Timestamped<V> stamped) {
    if ((expireAfterAccess == UNSET_INT) && (expireAfterWrite == UNSET_INT)) {
      return false;
    }

    boolean expireWrite = (stamped.getWriteTimestamp() + expireAfterWrite <= currentTimeNanos());
    boolean expireAccess = (stamped.getAccessTimestamp() + expireAfterAccess <= currentTimeNanos());

    if (expireAfterAccess == UNSET_INT) {
      return expireWrite;
    }

   * @throws IllegalStateException if {@link #expireAfterAccess} was already set
   */
  @SuppressWarnings("GoodTime") // should accept a Duration
  @CanIgnoreReturnValue
  public CacheBuilder<K, V> expireAfterAccess(long duration, TimeUnit unit) {
    checkState(
        expireAfterAccessNanos == UNSET_INT,
        "expireAfterAccess was already set to %s ns",
        expireAfterAccessNanos);

    boolean wasEvicted() {
      return true;
    }
  },

  /**
   * The entry's expiration timestamp has passed. This can occur when using {@link
   * CacheBuilder#expireAfterWrite} or {@link CacheBuilder#expireAfterAccess}.
   */
  EXPIRED {
    @Override
    boolean wasEvicted() {
      return true;
    }
  },

  /**
   * The entry was evicted due to size constraints. This can occur when using {@link