assertThat(map.entryHelper)
        .isInstanceOf(MapMakerInternalMap.StrongKeyStrongValueEntry.Helper.class);

    assertEquals(4, map.concurrencyLevel);

    // concurrency level
    assertThat(map.segments).hasLength(4);
    // initial capacity / concurrency level
    assertEquals(16 / map.segments.length, map.segments[0].table.length());
  }

  public void testSetKeyEquivalence() {
    Equivalence<Object> testEquivalence =

    assertThat(map.entryHelper)
        .isInstanceOf(MapMakerInternalMap.StrongKeyStrongValueEntry.Helper.class);

    assertEquals(4, map.concurrencyLevel);

    // concurrency level
    assertThat(map.segments).hasLength(4);
    // initial capacity / concurrency level
    assertEquals(16 / map.segments.length, map.segments[0].table.length());
  }

  public void testSetKeyEquivalence() {
    Equivalence<Object> testEquivalence =

  //    definitely observe all earlier writes, but we still have no guarantee that done() would see
  //    the initial write (just stronger guarantees if it does).
  //
  // See: http://cs.oswego.edu/pipermail/concurrency-interest/2015-January/013800.html
  // For a (long) discussion about this specific issue and the general futility of life.
  //
  // For the time being we are OK with the problem discussed above since it requires a caller to

    assertSame(DISCARDING_QUEUE, map.removalNotificationQueue);
    assertSame(NULL_TICKER, map.ticker);

    assertEquals(4, map.concurrencyLevel);

    // concurrency level
    assertThat(map.segments).hasLength(4);
    // initial capacity / concurrency level
    assertEquals(16 / map.segments.length, map.segments[0].table.length());

    assertFalse(map.evictsBySize());
    assertFalse(map.expires());

  public void testSizingDefaults() {
    LoadingCache<?, ?> cache = CacheBuilder.newBuilder().build(identityLoader());
    LocalCache<?, ?> map = CacheTesting.toLocalCache(cache);
    assertThat(map.segments).hasLength(4); // concurrency level
    assertEquals(4, map.segments[0].table.length()); // capacity / conc level
  }

  @GwtIncompatible // CountDownLatch
  static final class DelayingIdentityLoader<T> extends CacheLoader<T, T> {

  public void testSizingDefaults() {
    LoadingCache<?, ?> cache = CacheBuilder.newBuilder().build(identityLoader());
    LocalCache<?, ?> map = CacheTesting.toLocalCache(cache);
    assertThat(map.segments).hasLength(4); // concurrency level
    assertEquals(4, map.segments[0].table.length()); // capacity / conc level
  }

  @GwtIncompatible // CountDownLatch
  static final class DelayingIdentityLoader<T> extends CacheLoader<T, T> {

    misconfigured `ExecutorService` that limited the number of worker threads.
    If you're using `Call.enqueue()` this update should significantly improve
    request concurrency.

 *  **Fix: Lazily initialize the response cache.** This avoids strict mode
    warnings when initializing OkHttp on Android‘s main thread.

 *  **Fix: Disable ALPN on Android 4.4.** That release of the feature was

   *
   * <p>We manage calls to this method carefully, to signal only when necessary, but never losing a
   * signal, which is the classic problem of this kind of concurrency construct. We must signal if
   * the current thread is about to relinquish the lock and may have changed the state protected by
   * the monitor, thereby causing some guard to be satisfied.
   *

      }
      String error = errorMessage.get();
      assertNull(error, error);
    }
    executor.shutdown();
  }

  /**
   * He did the bash, he did the future bash The future bash, it was a concurrency smash He did the
   * bash, it caught on in a flash He did the bash, he did the future bash
   */

  public void testFutureBash() {
    if (isWindows()) {

    }

    /**
     * Deletes a document from the specified index with optimistic concurrency control.
     *
     * @param index       the index name
     * @param id          the document ID
     * @param seqNo       the sequence number for optimistic concurrency control
     * @param primaryTerm the primary term for optimistic concurrency control
     * @return true if the document was deleted successfully, false otherwise