@Override
    public boolean add(E e) {
      synchronized (mutex) {
        return delegate().add(e);
      }
    }

    @Override
    public boolean addAll(Collection<? extends E> c) {
      synchronized (mutex) {
        return delegate().addAll(c);
      }
    }

    @Override
    public void clear() {
      synchronized (mutex) {
        delegate().clear();
      }
    }

        CopyOnWriteArraySet<Subscriber> newSet = new CopyOnWriteArraySet<>();
        eventSubscribers =
            MoreObjects.firstNonNull(subscribers.putIfAbsent(eventType, newSet), newSet);
      }

      eventSubscribers.addAll(eventMethodsInListener);
    }
  }

  /** Unregisters all subscribers on the given listener object. */
  void unregister(Object listener) {

  @CanIgnoreReturnValue
  public B suppressing(Method... methods) {
    return suppressing(asList(methods));
  }

  @CanIgnoreReturnValue
  public B suppressing(Collection<Method> methods) {
    suppressedTests.addAll(methods);
    return self();
  }

  public Set<Method> getSuppressedTests() {
    return suppressedTests;
  }

  private static final Logger logger =

  }

  private static TestSuite wrappedHashMapTests(
      WrappedHashMapGenerator generator, String name, Feature<?>... features) {
    List<Feature<?>> featuresList = Lists.newArrayList(features);
    Collections.addAll(
        featuresList,
        MapFeature.GENERAL_PURPOSE,
        CollectionFeature.SUPPORTS_ITERATOR_REMOVE,
        CollectionSize.ANY);
    return MapTestSuiteBuilder.using(generator)
        .named(name)

            for (final BooleanClause clause : clauses) {
                final Query q = clause.getQuery();
                if (q instanceof BooleanQuery) {
                    queryList.addAll(getTermQueryList(q, fields));
                } else if (q instanceof final TermQuery termQuery) {
                    for (final String field : fields) {
                        if (field.equals(termQuery.getTerm().field())) {

    return Iterables.<E>toArray(getDelegate(), type);
  }

  /**
   * Copies all the elements from this fluent iterable to {@code collection}. This is equivalent to
   * calling {@code Iterables.addAll(collection, this)}.
   *
   * <p><b>{@code Stream} equivalent:</b> {@code stream.forEachOrdered(collection::add)} or {@code
   * stream.forEach(collection::add)}.
   *

      value: String,
    ) = apply {
      headersCheckName(name)
      addLenient(name, value)
    }

    /**
     * Adds all headers from an existing collection.
     */
    fun addAll(headers: Headers) = commonAddAll(headers)

    /**
     * Add a header with the specified name and formatted date. Does validation of header names and
     * value.
     */
    fun add(
      name: String,

  /**
   * Returns a set of all row key / column key / value triplets. Changes to the returned set will
   * update the underlying table, and vice versa. The cell set does not support the {@code add} or
   * {@code addAll} methods.
   *
   * @return set of table cells consisting of row key / column key / value triplets
   */
  Set<Cell<R, C, V>> cellSet();

  /**

            Currency.FRANC, Country.SWITZERLAND);
    EnumBiMap<Currency, Country> bimap = EnumBiMap.create(map);
    Set<Object> uniqueEntries = Sets.newIdentityHashSet();
    uniqueEntries.addAll(bimap.entrySet());
    assertEquals(3, uniqueEntries.size());
  }

  @J2ktIncompatible
  @GwtIncompatible // serialization
  public void testSerializable() {
    SerializableTester.reserializeAndAssert(

        C filtered = filter(createUnfiltered(contents), EVEN);
        C filteredToModify = filter(createUnfiltered(contents), EVEN);

        assertThrows(IllegalArgumentException.class, () -> filteredToModify.addAll(toAdd));

        assertThat(filteredToModify).containsExactlyElementsIn(filtered);
      }
    }

    public void testAddToFilterFiltered() {
      for (List<Integer> contents : SAMPLE_INPUTS) {