*/
  public static <K extends @Nullable Object, V extends @Nullable Object> Multimap<K, V> newMultimap(
      Map<K, Collection<V>> map, final Supplier<? extends Collection<V>> factory) {
    return new CustomMultimap<>(map, factory);
  }

  private static class CustomMultimap<K extends @Nullable Object, V extends @Nullable Object>
      extends AbstractMapBasedMultimap<K, V> {

   * @throws IllegalArgumentException if {@code size} is nonpositive
   */
  public static <T extends @Nullable Object>
      UnmodifiableIterator<List<@Nullable T>> paddedPartition(Iterator<T> iterator, int size) {
    return partitionImpl(iterator, size, true);
  }

  private static <T extends @Nullable Object> UnmodifiableIterator<List<@Nullable T>> partitionImpl(
      Iterator<T> iterator, int size, boolean pad) {
    checkNotNull(iterator);

   * @throws IllegalArgumentException if {@code size} is nonpositive
   */
  public static <T extends @Nullable Object>
      UnmodifiableIterator<List<@Nullable T>> paddedPartition(Iterator<T> iterator, int size) {
    return partitionImpl(iterator, size, true);
  }

  private static <T extends @Nullable Object> UnmodifiableIterator<List<@Nullable T>> partitionImpl(
      Iterator<T> iterator, int size, boolean pad) {
    checkNotNull(iterator);

        public <T extends IOException, S extends Callable<String>, V> BeanWithComplexConstructor(
            Callable rawValue,
            Callable<String> value,
            Callable<? extends String> subType,
            Callable<? super String> superType,
            Callable<?> wildcard,
            Callable<? extends Callable<?>> nested,
            Callable<S> typeVar,
            Callable<? extends T> typeVarWithBounds,

    }

    private static FailureContainer toFailureContainer(@Nullable InternalBasicProblemDetailsVersion3 problemDetails) {
        return toFailureContainer(problemDetails == null ? null : problemDetails.getFailure());
    }

    private static FailureContainer toFailureContainer(@Nullable InternalFailure failure) {
        if (failure == null) {
            return new DefaultFailureContainer(null);

            }
            excludedByEither.add(constraintExclusions);
        }
        return excludedByEither;
    }

    @Nullable
    private ExcludeSpec joinNodeExclusions(@Nullable ExcludeSpec nodeExclusions, @Nullable Set<ExcludeSpec> excludedByEither) {
        if (excludedByEither != null) {
            if (nodeExclusions != null) {
                excludedByEither.add(nodeExclusions);

    }

    def "can use a callable to specify the contents of the collection"() {
        given:
        def file1 = new File("1")
        def file2 = new File("2")
        def callable = Mock(Callable)

        when:
        collection.from(callable)
        def files = collection.files

        then:
        1 * callable.call() >> ["src1", "src2"]

   * @since 12.0
   */
  public static <E extends @Nullable Object> NavigableSet<E> unmodifiableNavigableSet(
      NavigableSet<E> set) {
    if (set instanceof ImmutableCollection || set instanceof UnmodifiableNavigableSet) {
      return set;
    }
    return new UnmodifiableNavigableSet<>(set);
  }

  static final class UnmodifiableNavigableSet<E extends @Nullable Object>

   * @since 12.0
   */
  public static <E extends @Nullable Object> NavigableSet<E> unmodifiableNavigableSet(
      NavigableSet<E> set) {
    if (set instanceof ImmutableCollection || set instanceof UnmodifiableNavigableSet) {
      return set;
    }
    return new UnmodifiableNavigableSet<>(set);
  }

  static final class UnmodifiableNavigableSet<E extends @Nullable Object>

    Iterator<@Nullable String> set = Arrays.<@Nullable String>asList("a", null, "b").iterator();
    assertTrue(Iterators.contains(set, "b"));
  }

  public void test_contains_nonnull_no() {
    Iterator<String> set = asList("a", "b").iterator();
    assertFalse(Iterators.contains(set, "c"));
  }

  public void test_contains_null_yes() {