ListenableFuture<String> future = immediateFailedFuture(exception);
    assertThat(future.toString()).endsWith("[status=FAILURE, cause=[" + exception + "]]");

    try {
      getDone(future);
      fail();
    } catch (ExecutionException expected) {
      assertSame(exception, expected.getCause());
    }

    try {
      getDoneFromTimeoutOverload(future);
      fail();

    ListenableFuture<String> future = immediateFailedFuture(exception);
    assertThat(future.toString()).endsWith("[status=FAILURE, cause=[" + exception + "]]");

    try {
      getDone(future);
      fail();
    } catch (ExecutionException expected) {
      assertSame(exception, expected.getCause());
    }

    try {
      getDoneFromTimeoutOverload(future);
      fail();

      } else {
        // The pending load was removed. Delay notifications until loading completes.
        oldValue = unset();
      }

      // TODO(fry): could also cancel loading if we had a handle on its future
    }

    public ListenableFuture<V> loadFuture(K key, CacheLoader<? super K, V> loader) {
      try {
        stopwatch.start();
        V previousValue = oldValue.get();

   *
   * @param <V1> the type returned by the first future
   * @param <V2> the type returned by the second future
   * @param <V3> the type returned by the third future
   * @param <V4> the type returned by the fourth future
   * @param <V5> the type returned by the fifth future
   */
  public static final class Combiner5<
          V1 extends @Nullable Object,

      } else {
        // The pending load was removed. Delay notifications until loading completes.
        oldValue = unset();
      }

      // TODO(fry): could also cancel loading if we had a handle on its future
    }

    public ListenableFuture<V> loadFuture(K key, CacheLoader<? super K, V> loader) {
      try {
        stopwatch.start();
        V previousValue = oldValue.get();

   *   Iterator<Long> it = set.iterator(); // Must be in synchronized block
   *   while (it.hasNext()) {
   *     foo(it.next());
   *   }
   * }
   * }</pre>
   *
   * <p>Failure to follow this advice may result in non-deterministic behavior.
   *
   * <p>The returned bimap will be serializable if the specified bimap is serializable.
   *