}

  public void testKeySet() {
    Map<String, Integer> map = create();
    Set<String> keySet = map.keySet();
    assertTrue(keySet instanceof SynchronizedSet);
    assertThat(((SynchronizedSet<?>) keySet).mutex).isSameInstanceAs(mutex);
  }

  public void testValues() {
    Map<String, Integer> map = create();
    Collection<Integer> values = map.values();

  }

  public void testKeySet() {
    Map<String, Integer> map = create();
    Set<String> keySet = map.keySet();
    assertTrue(keySet instanceof SynchronizedSet);
    assertThat(((SynchronizedSet<?>) keySet).mutex).isSameInstanceAs(mutex);
  }

  public void testValues() {
    Map<String, Integer> map = create();
    Collection<Integer> values = map.values();

              numSuccessfulSetCalls.incrementAndGet();
            }
            awaitUnchecked(barrier);
            return null;
          }
        };
    Set<Object> finalResults = Collections.synchronizedSet(Sets.newIdentityHashSet());
    Runnable collectResultsRunnable =
        () -> {
          try {
            String result = Uninterruptibles.getUninterruptibly(currentFuture.get());

              numSuccessfulSetCalls.incrementAndGet();
            }
            awaitUnchecked(barrier);
            return null;
          }
        };
    Set<Object> finalResults = Collections.synchronizedSet(Sets.newIdentityHashSet());
    Runnable collectResultsRunnable =
        () -> {
          try {
            String result = Uninterruptibles.getUninterruptibly(currentFuture.get());

    protected Map<String, Supplier<String>> updateConfigListenerMap = new HashMap<>();

    /** A set of names of threads that are currently waiting. */
    protected Set<String> waitingThreadNames = Collections.synchronizedSet(new HashSet<>());

    /**
     * Initializes the SystemHelper.
     * This method sets up system properties, caches, and other initial configurations.
     */
    @PostConstruct
    public void init() {