} finally {
        monitor.leave();
      }
    }

    void awaitHealthy(long timeout, TimeUnit unit) throws TimeoutException {
      monitor.enter();
      try {
        if (!monitor.waitForUninterruptibly(awaitHealthGuard, timeout, unit)) {
          throw new TimeoutException(
              "Timeout waiting for the services to become healthy. The "
                  + "following services have not started: "

    return "tryEnterIf";
  }

  private String enterWhen() {
    return interruptible ? "enterWhen" : "enterWhenUninterruptibly";
  }

  private String waitFor() {
    return interruptible ? "waitFor" : "waitForUninterruptibly";
  }

  private String leave() {
    return "leave";
  }

  public final void testMutualExclusion() throws Exception {
    thread1.callAndAssertReturns(enter());

   *
   * @return whether the guard is now satisfied
   * @since 28.0 (but only since 33.4.0 in the Android flavor)
   */
  public boolean waitForUninterruptibly(Guard guard, Duration time) {
    return waitForUninterruptibly(guard, toNanosSaturated(time), TimeUnit.NANOSECONDS);
  }

  /**
   * Waits for the guard to be satisfied. Waits at most the given time. May be called only by a