*
   * @since 30.0
   */
  @J2ktIncompatible
  @GwtIncompatible // concurrency
  public static void awaitTerminationUninterruptibly(ExecutorService executor) {
    // TODO(cpovirk): We could optimize this to avoid calling nanoTime() at all.
    verify(awaitTerminationUninterruptibly(executor, Long.MAX_VALUE, NANOSECONDS));
  }

  /**