*/
    @Test
    public void testGetClassLoader() throws Exception {
        assertThat(ClassLoaderUtil.getClassLoader(Object.class), is(sameInstance(ClassLoaderUtil.class.getClassLoader())));

        assertThat(ClassLoaderUtil.getClassLoader(TestCase.class), is(sameInstance(TestCase.class.getClassLoader())));

        final ClassLoader context = Thread.currentThread().getContextClassLoader();
        try {

        .addEqualityGroup(classInfo(Test.class), classInfo(Test.class, getClass().getClassLoader()))
        .addEqualityGroup(
            new ResourceInfo(FILE, "a/b/c.txt", getClass().getClassLoader()),
            new ResourceInfo(FILE, "a/b/c.txt", getClass().getClassLoader()))
        .addEqualityGroup(new ResourceInfo(FILE, "x.txt", getClass().getClassLoader()))
        .testEquals();
  }

        // Load both resources
        try (InputStream is1 = getClass().getClassLoader().getResourceAsStream("suggest_indices/suggest/mappings-default.json")) {
            assertNotNull("Mappings resource should exist", is1);
            mappings = new String(is1.readAllBytes(), StandardCharsets.UTF_8);
        }

        try (InputStream is2 = getClass().getClassLoader().getResourceAsStream("suggest_indices/suggest.json")) {

        .addEqualityGroup(classInfo(Test.class), classInfo(Test.class, getClass().getClassLoader()))
        .addEqualityGroup(
            new ResourceInfo(FILE, "a/b/c.txt", getClass().getClassLoader()),
            new ResourceInfo(FILE, "a/b/c.txt", getClass().getClassLoader()))
        .addEqualityGroup(new ResourceInfo(FILE, "x.txt", getClass().getClassLoader()))
        .testEquals();
  }

      super(x, queue);
    }

    @Override
    public void finalizeReferent() {}
  }

  private WeakReference<ClassLoader> useFrqInSeparateLoader() throws Exception {
    ClassLoader myLoader = getClass().getClassLoader();
    URLClassLoader sepLoader = new URLClassLoader(getClassPathUrls(), myLoader.getParent());
    // sepLoader is the loader that we will use to load the parallel FinalizableReferenceQueue (FRQ)

   */
  private static final ClassLoader NO_VAR_HANDLE =
      getClassLoader(ImmutableSet.of("java.lang.invoke.VarHandle"));

  /**
   * This classloader disallows {@link java.lang.invoke.VarHandle} and {@link sun.misc.Unsafe},
   * which will prevent us from selecting the {@code UnsafeAtomicHelper} strategy.
   */
  private static final ClassLoader NO_UNSAFE =
      getClassLoader(ImmutableSet.of("java.lang.invoke.VarHandle", "sun.misc.Unsafe"));

    }
    return urls.build().toArray(new URL[0]);
  }

  /** Returns the URLs in the class path. */
  static URL[] getClassPathUrls() {
    return ClassPathUtil.class.getClassLoader() instanceof URLClassLoader
        ? ((URLClassLoader) ClassPathUtil.class.getClassLoader()).getURLs()
        : parseJavaClassPath();
  }

            throw new ClIllegalArgumentException("field", "ECL0094",
                    asArray(clazz.getName(), clazz.getClassLoader(), fieldClass.getName(), fieldClass.getClassLoader(), field.getName(),
                            valueClass == null ? null : valueClass.getName(), valueClass == null ? null : valueClass.getClassLoader(),
                            value, targetClass == null ? null : targetClass.getName(),

     */
    public static ClassLoader getClassLoader(final Class<?> targetClass) {
        assertArgumentNotNull("targetClass", targetClass);

        final ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
        if (contextClassLoader != null) {
            return contextClassLoader;
        }

        final ClassLoader targetClassLoader = targetClass.getClassLoader();

  }

  private static ClassLoader getClassLoader(Set<String> blocklist) {
    String concurrentPackage = SettableFuture.class.getPackage().getName();
    ClassLoader classLoader = AggregateFutureStateFallbackAtomicHelperTest.class.getClassLoader();
    // we delegate to the current classloader so both loaders agree on classes like TestCase