public void testGetChecked_classUnloading() throws Exception {
    WeakReference<?> classUsedByGetChecked = doTestClassUnloading();
    GcFinalization.awaitClear(classUsedByGetChecked);
  }

  /**
   * Loads {@link WillBeUnloadedException} in a separate {@code ClassLoader}, calls {@code
   * getChecked(future, WillBeUnloadedException.class)}, and returns the loader. The caller can then

 * unloading an OSGi bundle.
 *
 * <p>{@code com.google.common.base.FinalizableReferenceQueue} loads this class in its own class
 * loader. That way, this class doesn't prevent the main class loader from getting garbage
 * collected, and this class can detect when the main class loader has been garbage collected and
 * stop itself.
 */

 * unloading an OSGi bundle.
 *
 * <p>{@code com.google.common.base.FinalizableReferenceQueue} loads this class in its own class
 * loader. That way, this class doesn't prevent the main class loader from getting garbage
 * collected, and this class can detect when the main class loader has been garbage collected and
 * stop itself.
 */

  public void testGetChecked_classUnloading() throws Exception {
    WeakReference<?> classUsedByGetChecked = doTestClassUnloading();
    GcFinalization.awaitClear(classUsedByGetChecked);
  }

  /**
   * Loads {@link WillBeUnloadedException} in a separate {@code ClassLoader}, calls {@code
   * getChecked(future, WillBeUnloadedException.class)}, and returns the loader. The caller can then

          @Override
          public String load(String key) throws Exception {
            return cache.get(
                key,
                identityLoader()); // recursive load (same as the initial one), this should fail
          }
        };
    CacheLoader<String, String> proxyLoader =
        new CacheLoader<String, String>() {
          @Override
          public String load(String key) throws Exception {

          @Override
          public String load(String key) throws Exception {
            return cache.get(
                key,
                identityLoader()); // recursive load (same as the initial one), this should fail
          }
        };
    CacheLoader<String, String> proxyLoader =
        new CacheLoader<String, String>() {
          @Override
          public String load(String key) throws Exception {

    /**
     * Gets the class loader from which to load any types referenced by the configuration. If unset, the class loader of
     * the bean class will be used.
     *
     * @return The class loader to load referenced types from or {@code null} if unset.
     */
    ClassLoader getClassLoader();

    /**
     * Sets the class loader from which to load any types referenced by the configuration. If unset, the class loader of

    }

    public void delete(final User user) {
        chains().of(stream -> stream.forEach(c -> c.delete(user)));
    }

    public User load(final User user) {
        User u = user;
        for (final AuthenticationChain chain : chains) {
            u = chain.load(u);
        }
        return u;
    }

    public void addChain(final AuthenticationChain chain) {
        chains = ArrayUtils.addAll(chains, chain);

        }
        load();
    }

    public List<KeyMatch> getAvailableKeyMatchList() {
        return ComponentUtil.getComponent(KeyMatchBhv.class).selectList(cb -> {
            cb.query().matchAll();
            cb.fetchFirst(ComponentUtil.getFessConfig().getPageKeymatchMaxFetchSizeAsInteger());
        });
    }

    @Override
    public int load() {

    @Override
    public void notifyNewValue(@CheckForNull V newValue) {
      if (newValue != null) {
        // The pending load was clobbered by a manual write.
        // Unblock all pending gets, and have them return the new value.
        set(newValue);
      } else {
        // The pending load was removed. Delay notifications until loading completes.
        oldValue = unset();
      }