* name as one of the public methods of {@link TypeVariableImpl}, the proxy calls the same method
   * on its instance of {@code TypeVariableImpl}. Otherwise it throws {@link
   * UnsupportedOperationException}; this should only apply to {@code getAnnotatedBounds()}. This
   * does mean that users on Java 8 who obtain an instance of {@code TypeVariable} from {@link

    // unmeasurable (comparing done AbstractFutures with immediateFuture)
    if (obj instanceof Cancellation) {
      throw cancellationExceptionWithCause("Task was cancelled.", ((Cancellation) obj).cause);
    } else if (obj instanceof Failure) {
      throw new ExecutionException(((Failure) obj).exception);
    } else if (obj == NULL) {
      /*

        Collection<E> collection) {
      if (collection instanceof NavigableSet) {
        return Sets.unmodifiableNavigableSet((NavigableSet<E>) collection);
      } else if (collection instanceof SortedSet) {
        return Collections.unmodifiableSortedSet((SortedSet<E>) collection);
      } else if (collection instanceof Set) {
        return Collections.unmodifiableSet((Set<E>) collection);

   * @return an unmodifiable view of the multiset
   */
  public static <E extends @Nullable Object> Multiset<E> unmodifiableMultiset(
      Multiset<? extends E> multiset) {
    if (multiset instanceof UnmodifiableMultiset || multiset instanceof ImmutableMultiset) {
      @SuppressWarnings("unchecked") // Since it's unmodifiable, the covariant cast is safe
      Multiset<E> result = (Multiset<E>) multiset;
      return result;
    }

  @GwtCompatible(serializable = true)
  public static <E extends Enum<E>> ImmutableSet<E> immutableEnumSet(Iterable<E> elements) {
    if (elements instanceof ImmutableEnumSet) {
      return (ImmutableEnumSet<E>) elements;
    } else if (elements instanceof Collection) {
      Collection<E> collection = (Collection<E>) elements;
      if (collection.isEmpty()) {
        return ImmutableSet.of();
      } else {

  public static <T extends @Nullable Object> Iterable<T> unmodifiableIterable(
      final Iterable<? extends T> iterable) {
    checkNotNull(iterable);
    if (iterable instanceof UnmodifiableIterable || iterable instanceof ImmutableCollection) {
      @SuppressWarnings("unchecked") // Since it's unmodifiable, the covariant cast is safe
      Iterable<T> result = (Iterable<T>) iterable;
      return result;
    }

                errors << "Nullability breaking change"
            }

        } else if (member instanceof JApiConstructor) {

            JApiConstructor ctor = (JApiConstructor) member
            inspectParametersNullabilityOf(ctor.oldConstructor.get(), ctor.newConstructor.get())

        } else if (member instanceof JApiMethod) {

            JApiMethod method = (JApiMethod) member

        partitions instanceof RandomAccess);

    assertTrue(
        "partition[0] should be RandomAccess, but not: " + partitions.get(0).getClass(),
        partitions.get(0) instanceof RandomAccess);

    assertTrue(
        "partition[1] should be RandomAccess, but not: " + partitions.get(1).getClass(),
        partitions.get(1) instanceof RandomAccess);
  }

                        AnnotatedBindingBuilder<Object> binder = bind(itf);
                        if (key.getQualifier() instanceof String s) {
                            binder.annotatedWith(Names.named(s));
                        } else if (key.getQualifier() instanceof Annotation a) {
                            binder.annotatedWith(a);
                        }

        assertTrue(
                tms.get(0) instanceof ReleaseArtifactTransformation,
                "We expected the release transformation and got " + tms.get(0));

        assertTrue(
                tms.get(1) instanceof LatestArtifactTransformation,
                "We expected the latest transformation and got " + tms.get(1));

        assertTrue(
                tms.get(2) instanceof SnapshotTransformation,