* of {@link java.util.concurrent.CompletableFuture#thenAccept} and {@link
   * java.util.concurrent.CompletableFuture#thenAcceptAsync}.
   *
   * @param callback The callback to invoke when this {@code Future} is completed.
   * @param executor The executor to run {@code callback} when the future completes.
   */
  public final void addCallback(FutureCallback<? super V> callback, Executor executor) {

     */
    SettableFuture<@Nullable Void> newFuture = SettableFuture.create();

    ListenableFuture<@Nullable Void> oldFuture = ref.getAndSet(newFuture);

    // Invoke our task once the previous future completes.
    TrustedListenableFutureTask<T> taskFuture = TrustedListenableFutureTask.create(task);
    oldFuture.addListener(taskFuture, taskExecutor);

	c.Assert(groupInfo.Policy, policy)
	c.Assert(groupInfo.Status, string(madmin.GroupEnabled))

	// 5. Disable/enable the group and verify that user access is revoked/restored.
	err = s.adm.SetGroupStatus(ctx, group, madmin.GroupDisabled)
	if err != nil {
		c.Fatalf("group set status err: %v", err)
	}
	groupInfo, err = s.adm.GetGroupDescription(ctx, group)
	if err != nil {

  }

  private static final CharMatcher WHATEVER =
      new CharMatcher() {
        @Override
        public boolean matches(char c) {
          throw new AssertionFailedError("You weren't supposed to actually invoke me!");
        }
      };

  public void testAnyAndNone_logicalOps() throws Exception {
    // These are testing behavior that's never promised by the API, but since

   * async task to do so.
   */
  inner class ReaderRunnable internal constructor(
    internal val reader: Http2Reader,
  ) : Http2Reader.Handler, () -> Unit {
    override fun invoke() {
      var connectionErrorCode = ErrorCode.INTERNAL_ERROR
      var streamErrorCode = ErrorCode.INTERNAL_ERROR
      var errorException: IOException? = null
      try {
        reader.readConnectionPreface(this)

    return Reflection.newProxy(interfaceType, new FreshInvocationHandler(interfaceType));
  }

  private Object invokeGeneratorMethod(Method generator, Object... args) {
    try {
      return generator.invoke(this, args);
    } catch (InvocationTargetException e) {
      throwIfUnchecked(e.getCause());
      throw new RuntimeException(e.getCause());
    } catch (Exception e) {
      throwIfUnchecked(e);

        ? ((Collection<T>) iterable).stream()
        : StreamSupport.stream(iterable.spliterator(), false);
  }

  /**
   * Returns {@link Collection#stream}.
   *
   * @deprecated There is no reason to use this; just invoke {@code collection.stream()} directly.
   */
  @Deprecated
  @InlineMe(replacement = "collection.stream()")
  public static <T extends @Nullable Object> Stream<T> stream(Collection<T> collection) {

    assertThat(units).isEmpty();
  }

  public void testToImmutableEnumSetReused() {
    // The method call lets us capture the accumulator as an A and invoke the callbacks manually
    genericTestToImmutableEnumSetReused(Sets.<SomeEnum>toImmutableEnumSet());
  }

  private static <A extends @Nullable Object> void genericTestToImmutableEnumSetReused(

    return Reflection.newProxy(interfaceType, new FreshInvocationHandler(interfaceType));
  }

  private Object invokeGeneratorMethod(Method generator, Object... args) {
    try {
      return generator.invoke(this, args);
    } catch (InvocationTargetException e) {
      throwIfUnchecked(e.getCause());
      throw new RuntimeException(e.getCause());
    } catch (Exception e) {
      throwIfUnchecked(e);

 *       other code to use these forms too. Only the most typically used JUnit assertion methods are
 *       defined this way, but enough to live with.
 *   <li>If you override {@link #setUp} or {@link #tearDown}, make sure to invoke {@code
 *       super.setUp} and {@code super.tearDown} within them. These methods are used to clear and
 *       check for thread assertion failures.