throw new AssertionError();
  }

  /** Loads Finalizer.class. */
  interface FinalizerLoader {

    /**
     * Returns Finalizer.class or null if this loader shouldn't or can't load it.
     *
     * @throws SecurityException if we don't have the appropriate privileges
     */
    @CheckForNull
    Class<?> loadFinalizer();
  }

  /**

     * named with the '$' character. If this is a concern, you could use {@link #load} and then
     * check on the loaded {@link Class} object instead.
     *
     * @since 30.1
     */
    public boolean isTopLevel() {
      return className.indexOf('$') == -1;
    }

    /**
     * Loads (but doesn't link or initialize) the class.
     *

          @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 {

 * 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.
 */

    final AtomicInteger count = new AtomicInteger();
    final Exception e = new IllegalStateException("exception to trigger failure on first load()");
    CacheLoader<Integer, String> failOnceFunction =
        new CacheLoader<Integer, String>() {

          @Override
          public String load(Integer key) throws Exception {
            if (count.getAndIncrement() == 0) {
              throw e;
            }

  private static final double DESIRED_LOAD_FACTOR = 0.5;

  /**
   * Returns an array size suitable for the backing array of a hash table that uses open addressing
   * with linear probing in its implementation. The returned size is the smallest power of two that
   * can hold setSize elements with the desired load factor.
   */
  @VisibleForTesting
  static int chooseTableSize(int setSize) {

      case UNORDERED:
        return new UndirectedGraphConnections<>(
            new HashMap<N, V>(INNER_CAPACITY, INNER_LOAD_FACTOR));
      case STABLE:
        return new UndirectedGraphConnections<>(
            new LinkedHashMap<N, V>(INNER_CAPACITY, INNER_LOAD_FACTOR));
      default:
        throw new AssertionError(incidentEdgeOrder.type());
    }
  }

  private Class<?> settableFutureClass;
  private Class<?> abstractFutureClass;

  @Override
  protected void setUp() throws Exception {
    // Load the "normal" copy of SettableFuture and related classes.
    SettableFuture<?> unused = SettableFuture.create();
    // Hack to load AbstractFuture et. al. in a new classloader so that it re-reads the cancellation

 *   <li>SafeAtomicHelper: uses Atomic FieldsUpdaters to implement synchronization
 *   <li>SynchronizedHelper: uses {@code synchronized} blocks for synchronization
 * </ul>
 *
 * To force selection of our fallback strategies we load {@link AggregateFutureState} (and all of
 * {@code com.google.common.util.concurrent}) in degenerate class loaders which make certain
 * platform classes unavailable. Then we construct a test suite so we can run the normal FuturesTest