@Override
  public final Service startAsync() {
    delegate.startAsync();
    return this;
  }

  /** @since 15.0 */
  @CanIgnoreReturnValue
  @Override
  public final Service stopAsync() {
    delegate.stopAsync();
    return this;
  }

  /** @since 15.0 */
  @Override
  public final void awaitRunning() {
    delegate.awaitRunning();
  }

  /** @since 15.0 */
  @Override

    state.awaitHealthy(timeout, unit);
  }

  /**
   * Initiates service {@linkplain Service#stopAsync shutdown} if necessary on all the services
   * being managed.
   *
   * @return this
   */
  @CanIgnoreReturnValue
  public ServiceManager stopAsync() {
    for (Service service : services) {
      service.stopAsync();
    }
    return this;
  }

  /**

    state.awaitHealthy(timeout, unit);
  }

  /**
   * Initiates service {@linkplain Service#stopAsync shutdown} if necessary on all the services
   * being managed.
   *
   * @return this
   */
  @CanIgnoreReturnValue
  public ServiceManager stopAsync() {
    for (Service service : services) {
      service.stopAsync();
    }
    return this;
  }

  /**

  @Override
  public final Service startAsync() {
    delegate.startAsync();
    return this;
  }

  /** @since 15.0 */
  @CanIgnoreReturnValue
  @Override
  public final Service stopAsync() {
    delegate.stopAsync();
    return this;
  }

  /** @since 15.0 */
  @Override
  public final void awaitRunning() {
    delegate.awaitRunning();
  }

  /** @since 28.0 */
  @Override