* other collection type like {@link List}, but it may be unexpected to the user of a multiset.
   *
   * @param elements the collection of elements to be checked for containment in this multiset
   * @return {@code true} if this multiset contains at least one occurrence of each element
   *     contained in {@code elements}
   * @throws NullPointerException if {@code elements} is null

  public final Object[] toArray() {
    return toArray(EMPTY_ARRAY);
  }

  @CanIgnoreReturnValue
  @Override
  /*
   * This suppression is here for two reasons:
   *
   * 1. b/192354773 in our checker affects toArray declarations.
   *
   * 2. `other[size] = null` is unsound. We could "fix" this by requiring callers to pass in an

        });
    }

    protected <BUILDER> int[] delegateBatchRequest(final List<? extends Entity> entityList, Function<EsAbstractEntity, BUILDER> call) {
        @SuppressWarnings("unchecked")
        final BulkList<? extends Entity, BUILDER> bulkList = (BulkList<? extends Entity, BUILDER>) entityList;
        final RequestOptionCall<BUILDER> builderEntityCall = bulkList.getEntityCall();

    setImplementation(ThreadFactory.class, Dummies.DummyThreadFactory.class);
    setImplementation(Executor.class, Dummies.DummyExecutor.class);
  }

  @SuppressWarnings("unchecked") // it's a subtype map
  private static <T> @Nullable Class<? extends T> getImplementation(Class<T> type) {
    return (Class<? extends T>) implementations.get(type);
  }

     *
     * @param str
     *            The string to convert.
     * @param locale
     *            The locale.
     * @return The converted {@link Date}.
     */
    @SuppressWarnings("unchecked")
    protected static Date toDate(final String str, final Locale locale) {
        for (final DateFormat format : MultiIterator.iterable(new DateFormatIterator(locale), new PlainDateFormatIterator(str, locale))) {

     *
     * @param str
     *            The string to convert.
     * @param locale
     *            The locale.
     * @return The converted {@link Date}.
     */
    @SuppressWarnings("unchecked")
    protected static Date toDate(final String str, final Locale locale) {
        for (final DateFormat format : MultiIterator.iterable(new DateFormatIterator(locale), new PlainDateFormatIterator(str, locale))) {

        oos.close();

        // Deserialize
        ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
        ObjectInputStream ois = new ObjectInputStream(bais);
        @SuppressWarnings("unchecked")
        TestAccessResultData<String> deserialized = (TestAccessResultData<String>) ois.readObject();
        ois.close();

        // Verify
        assertEquals("test data", new String(deserialized.getData()));

        });
    }

    protected <BUILDER> int[] delegateBatchRequest(final List<? extends Entity> entityList, Function<EsAbstractEntity, BUILDER> call) {
        @SuppressWarnings("unchecked")
        final BulkList<? extends Entity, BUILDER> bulkList = (BulkList<? extends Entity, BUILDER>) entityList;
        final RequestOptionCall<BUILDER> builderEntityCall = bulkList.getEntityCall();

        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @SuppressWarnings("unchecked")
            @Override
            public Tuple3<String, String, String>[] getVirtualHosts() {
                return virtualHostList.toArray(n -> new Tuple3[n]);
            }
        });

    UnmodifiableTable(Table<? extends R, ? extends C, ? extends V> delegate) {
      this.delegate = checkNotNull(delegate);
    }

    @SuppressWarnings("unchecked") // safe, covariant cast
    @Override
    protected Table<R, C, V> delegate() {
      return (Table<R, C, V>) delegate;
    }

    @Override
    public Set<Cell<R, C, V>> cellSet() {