*/
  private static class TransformingSequentialList<
          F extends @Nullable Object, T extends @Nullable Object>
      extends AbstractSequentialList<T> implements Serializable {
    final List<F> fromList;
    final Function<? super F, ? extends T> function;

    TransformingSequentialList(List<F> fromList, Function<? super F, ? extends T> function) {
      this.fromList = checkNotNull(fromList);

      Iterator<? extends V> valueItr = values.iterator();
      return valueItr.hasNext() && Iterators.addAll(get(key), valueItr);
    }
  }

  @CanIgnoreReturnValue
  @Override
  public boolean putAll(Multimap<? extends K, ? extends V> multimap) {
    boolean changed = false;
    for (Entry<? extends K, ? extends V> entry : multimap.entries()) {
      changed |= put(entry.getKey(), entry.getValue());
    }
    return changed;
  }

  @IgnoreJRERequirement // Users will use this only if they're already using Stream.
  public void writeLines(Stream<? extends CharSequence> lines, String lineSeparator)
      throws IOException {
    writeLines(lines.iterator(), lineSeparator);
  }

  private void writeLines(Iterator<? extends CharSequence> lines, String lineSeparator)
      throws IOException {
    checkNotNull(lineSeparator);

  }

  @Override
  public <T extends @Nullable Object> List<Future<T>> invokeAll(
      Collection<? extends Callable<T>> tasks) throws InterruptedException {
    return delegate().invokeAll(tasks);
  }

  @Override
  public <T extends @Nullable Object> List<Future<T>> invokeAll(
      Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
      throws InterruptedException {

    public boolean addAll(Collection<? extends V> collection) {
      checkNotNull(collection);
      throw new IllegalArgumentException("Key does not satisfy predicate: " + key);
    }

    @Override
    protected Set<V> delegate() {
      return emptySet();
    }
  }

  static class AddRejectingList<K extends @Nullable Object, V extends @Nullable Object>
      extends ForwardingList<V> {

  @SuppressWarnings("unchecked")
  private static <T extends @Nullable Object> ListenableFuture<? extends T>[] gwtCompatibleToArray(
      Iterable<? extends ListenableFuture<? extends T>> futures) {
    final Collection<ListenableFuture<? extends T>> collection;
    if (futures instanceof Collection) {
      collection = (Collection<ListenableFuture<? extends T>>) futures;
    } else {

  public static <E extends @Nullable Object> List<E> copyToList(Iterable<? extends E> elements) {
    List<E> list = new ArrayList<>();
    addAll(list, elements);
    return list;
  }

  public static <E extends @Nullable Object> List<E> copyToList(E[] elements) {
    return copyToList(asList(elements));
  }

  // Clone of Sets.newLinkedHashSet

   * @param <V5> the type returned by the fifth future
   */
  public static final class Combiner5<
          V1 extends @Nullable Object,
          V2 extends @Nullable Object,
          V3 extends @Nullable Object,
          V4 extends @Nullable Object,
          V5 extends @Nullable Object>
      extends Combiner {
    /**
     * A function that returns a value when applied to the values of the five futures passed to

     */
    LAST_BEFORE {
      @Override
      public <E extends @Nullable Object> int resultIndex(
          Comparator<? super E> comparator,
          @ParametricNullness E key,
          List<? extends E> list,
          int foundIndex) {
        return FIRST_PRESENT.resultIndex(comparator, key, list, foundIndex) - 1;
      }
    };

    abstract <E extends @Nullable Object> int resultIndex(

@GwtCompatible
final class TestExceptions {
  static class SomeError extends Error {}

  static class SomeCheckedException extends Exception {}

  static class SomeOtherCheckedException extends Exception {}

  static class YetAnotherCheckedException extends Exception {}

  static class SomeUncheckedException extends RuntimeException {}

  static class SomeChainingException extends RuntimeException {