// We post the event, but our Executor will not deliver it until instructed.
    bus.post(EVENT);

    List<String> events = catcher.getEvents();
    assertTrue("No events should be delivered synchronously.", events.isEmpty());

    // Now we find the task in our Executor and explicitly activate it.
    List<Runnable> tasks = executor.getTasks();
    assertEquals("One event dispatch task should be queued.", 1, tasks.size());

    }

    /**
     * Updates the user's group and role membership information with lazy loading for parent groups.
     * Direct groups are retrieved synchronously, while parent groups are fetched asynchronously
     * to avoid login delays when users have many nested group memberships.
     * @param user The Entra ID user to update.
     */
    public void updateMemberOf(final EntraIdUser user) {

     * DeferredCloser#eventuallyClose(Object, Executor)}.
     *
     * <p>If any such calls specified {@link MoreExecutors#directExecutor()}, those objects will be
     * closed synchronously.
     *
     * <p>Idempotent: objects will be closed at most once.
     */
    public void closeAsync() {
      state.close();
    }
  }

  /**

   * @throws IllegalStateException if {@link #refreshAfterWrite} was already set
   * @since 11.0
   * @deprecated Use {@link #refreshAfterWrite(Duration)} instead.
   */
  @GwtIncompatible // To be supported (synchronously).
  @Deprecated // GoodTime
  @CanIgnoreReturnValue
  public CacheBuilder<K, V> refreshAfterWrite(long duration, TimeUnit unit) {
    checkNotNull(unit);

   * @throws IllegalStateException if {@link #refreshAfterWrite} was already set
   * @since 11.0
   * @deprecated Use {@link #refreshAfterWrite(Duration)} instead.
   */
  @GwtIncompatible // To be supported (synchronously).
  @Deprecated // GoodTime
  @CanIgnoreReturnValue
  public CacheBuilder<K, V> refreshAfterWrite(long duration, TimeUnit unit) {
    checkNotNull(unit);

You have already seen how to test your **FastAPI** applications using the provided `TestClient`. Up to now, you have only seen how to write synchronous tests, without using `async` functions.

*   Introduce TFDecorator.
*   Added an Mfcc op for speech feature generation.
*   Improved DirectSession::Run() overhead and error checking. Feeding a value
    of the wrong type will now synchronously raise an INVALID_ARGUMENT error
    instead of asynchronously raising an INTERNAL error. Code that depends on
    the (undefined) behavior when feeding a tensor of the wrong type may need to
    be updated.

    }

    /**
     * Indexes a document asynchronously.
     *
     * @param request the index request
     * @return a future for the index response
     */
    @Override
    public ActionFuture<IndexResponse> index(final IndexRequest request) {
        return client.index(request);
    }

    /**
     * Indexes a document asynchronously with a callback.
     *

                queryLogs);
    }

    /**
     * Indexes documents from a query log reader asynchronously.
     *
     * @param ctx The content indexing context
     * @param queryLogReader The query log reader
     * @param docPerReq The number of documents to process per request

Anyway, in any of the cases above, FastAPI will still work asynchronously and be extremely fast.

But by following the steps above, it will be able to do some performance optimizations.

## Technical Details { #technical-details }