* accepts non-{@code Collection} iterables and empty iterables.
   */
  public static <E extends Enum<E>> EnumSet<E> newEnumSet(
      Iterable<E> iterable, Class<E> elementType) {
    EnumSet<E> set = EnumSet.noneOf(elementType);
    Iterables.addAll(set, iterable);
    return set;
  }

  // HashSet

  /**

   * Returns an iterator that cycles indefinitely over the elements of {@code iterable}.
   *
   * <p>The returned iterator supports {@code remove()} if the provided iterator does. After {@code
   * remove()} is called, subsequent cycles omit the removed element, which is no longer in {@code
   * iterable}. The iterator's {@code hasNext()} method returns {@code true} until {@code iterable}
   * is empty.
   *

    return delegatesCast;
  }

  /** Can't use Iterables.toArray because it's not gwt compatible */
  @SuppressWarnings("unchecked")
  private static <T extends @Nullable Object> ListenableFuture<? extends T>[] gwtCompatibleToArray(
      Iterable<? extends ListenableFuture<? extends T>> futures) {
    Collection<ListenableFuture<? extends T>> collection;

    Iterable<String> iterable = asList("a", "b");
    Iterator<String> cycle = Iterators.cycle(iterable);
    cycle.next();
    assertThrows(UnsupportedOperationException.class, () -> cycle.remove());
  }

  public void testCycleRemoveAfterHasNext() {
    Iterable<String> iterable = Lists.newArrayList("a");
    Iterator<String> cycle = Iterators.cycle(iterable);
    assertTrue(cycle.hasNext());

    @SuppressWarnings("rawtypes") // Iterable.class
    TypeToken<? extends Iterable> genericType = TypeToken.toGenericType(Iterable.class);
    assertEquals(Iterable.class, genericType.getRawType());
    assertEquals(
        Types.newParameterizedType(Iterable.class, Iterable.class.getTypeParameters()[0]),
        genericType.getType());
  }

    Iterable<String> iterable = asList("a", "b");
    Iterator<String> cycle = Iterators.cycle(iterable);
    cycle.next();
    assertThrows(UnsupportedOperationException.class, () -> cycle.remove());
  }

  public void testCycleRemoveAfterHasNext() {
    Iterable<String> iterable = Lists.newArrayList("a");
    Iterator<String> cycle = Iterators.cycle(iterable);
    assertTrue(cycle.hasNext());

    @SuppressWarnings("rawtypes") // Iterable.class
    TypeToken<? extends Iterable> genericType = TypeToken.toGenericType(Iterable.class);
    assertEquals(Iterable.class, genericType.getRawType());
    assertEquals(
        Types.newParameterizedType(Iterable.class, Iterable.class.getTypeParameters()[0]),
        genericType.getType());
  }

    public boolean putAll(@ParametricNullness K key, Iterable<? extends V> values) {
      throw new UnsupportedOperationException();
    }

    @Override
    public boolean putAll(Multimap<? extends K, ? extends V> multimap) {
      throw new UnsupportedOperationException();
    }

    @Override
    public Set<V> replaceValues(@ParametricNullness K key, Iterable<? extends V> values) {

    public boolean putAll(@ParametricNullness K key, Iterable<? extends V> values) {
      throw new UnsupportedOperationException();
    }

    @Override
    public boolean putAll(Multimap<? extends K, ? extends V> multimap) {
      throw new UnsupportedOperationException();
    }

    @Override
    public Set<V> replaceValues(@ParametricNullness K key, Iterable<? extends V> values) {

  /**
   * Returns {@code true} if a character sequence contains at least one matching BMP character.
   * Equivalent to {@code !matchesNoneOf(sequence)}.
   *
   * <p>The default implementation iterates over the sequence, invoking {@link #matches} for each
   * character, until this returns {@code true} or the end is reached.
   *
   * @param sequence the character sequence to examine, possibly empty