private final Cache<K, V> delegate;

    protected SimpleForwardingCache(Cache<K, V> delegate) {
      this.delegate = Preconditions.checkNotNull(delegate);
    }

    @Override
    protected final Cache<K, V> delegate() {
      return delegate;
    }
  }

   */
  private final transient EnumSet<E> delegate;

  private ImmutableEnumSet(EnumSet<E> delegate) {
    this.delegate = delegate;
  }

  @Override
  boolean isPartialView() {
    return false;
  }

  @Override
  public UnmodifiableIterator<E> iterator() {
    return Iterators.unmodifiableIterator(delegate.iterator());
  }

  @Override
  public int size() {

  @Override
  protected abstract SortedMap<K, V> delegate();

  @Override
  public @Nullable Comparator<? super K> comparator() {
    return delegate().comparator();
  }

  @Override
  @ParametricNullness
  public K firstKey() {
    return delegate().firstKey();
  }

  @Override
  public SortedMap<K, V> headMap(@ParametricNullness K toKey) {
    return delegate().headMap(toKey);
  }

  @Override

        .addEqualityGroup(map2, wrap(map2))
        .testEquals();
  }

  private static <K, V> ListMultimap<K, V> wrap(ListMultimap<K, V> delegate) {
    return new ForwardingListMultimap<K, V>() {
      @Override
      protected ListMultimap<K, V> delegate() {
        return delegate;
      }
    };
  }

    this.inverse = (ImmutableBiMap<V, K>) this;
  }

  RegularImmutableBiMap(ImmutableMap<K, V> delegate) {
    super(delegate);

    ImmutableMap.Builder<V, K> builder = ImmutableMap.builder();
    for (Entry<K, V> entry : delegate.entrySet()) {
      builder.put(entry.getValue(), entry.getKey());
    }
    ImmutableMap<V, K> backwardMap = builder.build();

        .addEqualityGroup(map2, wrap(map2))
        .testEquals();
  }

  private static <K, V> ListMultimap<K, V> wrap(ListMultimap<K, V> delegate) {
    return new ForwardingListMultimap<K, V>() {
      @Override
      protected ListMultimap<K, V> delegate() {
        return delegate;
      }
    };
  }

        .addEqualityGroup(map2, wrap(map2))
        .testEquals();
  }

  private static <K, V> SetMultimap<K, V> wrap(SetMultimap<K, V> delegate) {
    return new ForwardingSetMultimap<K, V>() {
      @Override
      protected SetMultimap<K, V> delegate() {
        return delegate;
      }
    };
  }

        .testEquals();
  }

  private static <K, V> SortedSetMultimap<K, V> wrap(SortedSetMultimap<K, V> delegate) {
    return new ForwardingSortedSetMultimap<K, V>() {
      @Override
      protected SortedSetMultimap<K, V> delegate() {
        return delegate;
      }
    };
  }

  }

  @Test
  fun emptyParameters() {
    assertThat(parse("permessage-deflate;"))
      .isEqualTo(WebSocketExtensions(perMessageDeflate = true))
  }

  @Test
  fun repeatedPerMessageDeflate() {
    assertThat(parse("permessage-deflate, permessage-deflate; server_no_context_takeover"))
      .isEqualTo(
        WebSocketExtensions(
          perMessageDeflate = true,
          serverNoContextTakeover = true,

  final transient Map<K, V> delegate;

  ForwardingImmutableMap(Map<? extends K, ? extends V> delegate) {
    this.delegate = Collections.unmodifiableMap(delegate);
  }

  @SuppressWarnings("unchecked")
  ForwardingImmutableMap(boolean throwIfDuplicateKeys, Entry<? extends K, ? extends V>... entries) {
    Map<K, V> delegate = Maps.newLinkedHashMap();