.inOrder();
    SpliteratorTester.of(
            () ->
                Streams.concat(Stream.of("a"), Stream.of("b"), Stream.empty(), Stream.of("c", "d"))
                    .spliterator())
        .expect("a", "b", "c", "d");
  }

  public void testConcat_refStream_closeIsPropagated() {
    AtomicInteger closeCountB = new AtomicInteger(0);
    Stream<String> streamB = Stream.of("b").onClose(closeCountB::incrementAndGet);

        .of(TWO_VALUES_SUM_OF_PRODUCTS_OF_DELTAS / 2);
    assertThat(manyValuesAccumulator.populationCovariance())
        .isWithin(ALLOWED_ERROR)
        .of(MANY_VALUES_SUM_OF_PRODUCTS_OF_DELTAS / MANY_VALUES_COUNT);
    assertThat(manyValuesAccumulatorByAddAllPartitionedPairedStats.populationCovariance())
        .isWithin(ALLOWED_ERROR)
        .of(MANY_VALUES_SUM_OF_PRODUCTS_OF_DELTAS / MANY_VALUES_COUNT);

        .of(TWO_VALUES_SUM_OF_PRODUCTS_OF_DELTAS / 2);
    assertThat(manyValuesAccumulator.populationCovariance())
        .isWithin(ALLOWED_ERROR)
        .of(MANY_VALUES_SUM_OF_PRODUCTS_OF_DELTAS / MANY_VALUES_COUNT);
    assertThat(manyValuesAccumulatorByAddAllPartitionedPairedStats.populationCovariance())
        .isWithin(ALLOWED_ERROR)
        .of(MANY_VALUES_SUM_OF_PRODUCTS_OF_DELTAS / MANY_VALUES_COUNT);

   * {@code elementSet().size()}.
   *
   * @return a view of the set of distinct elements in this multiset
   */
  Set<E> elementSet();

  /**
   * Returns a view of the contents of this multiset, grouped into {@code Multiset.Entry} instances,
   * each providing an element of the multiset and the count of that element. This set contains

    assertTrue(TypeToken.of(Object[].class).isArray());
    assertTrue(TypeToken.of(Object[][].class).isArray());
    assertTrue(TypeToken.of(char[].class).isArray());
    assertTrue(TypeToken.of(char[][].class).isArray());
    assertTrue(TypeToken.of(byte[].class).isArray());
    assertTrue(TypeToken.of(short[].class).isArray());
    assertTrue(TypeToken.of(int[].class).isArray());

    new EqualsTester()
        .addEqualityGroup(ImmutableDoubleArray.of())
        .addEqualityGroup(
            ImmutableDoubleArray.of(1, 2),
            reserialize(ImmutableDoubleArray.of(1, 2)),
            ImmutableDoubleArray.of(0, 1, 2, 3).subArray(1, 3))
        .addEqualityGroup(ImmutableDoubleArray.of(1, 3))
        .addEqualityGroup(ImmutableDoubleArray.of(1, 2, 3))
        .testEquals();
  }

  /**

    assertThat(ImmutableLongArray.of(0).isEmpty()).isFalse();
    assertThat(ImmutableLongArray.of(0, 1, 3).isEmpty()).isFalse();
    assertThat(ImmutableLongArray.of(0, 1, 3).subArray(1, 1).isEmpty()).isTrue();
    assertThat(ImmutableLongArray.of(0, 1, 3).subArray(1, 2).isEmpty()).isFalse();
  }

  public void testGet_good() {
    ImmutableLongArray iia = ImmutableLongArray.of(0, 1, 3);

 * override one or more methods to modify the behavior of the backing set as desired per the <a
 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>Warning:</b> The methods of {@code ForwardingNavigableSet} forward <i>indiscriminately</i>
 * to the methods of the delegate. For example, overriding {@link #add} alone <i>will not</i> change

    /** The key of the configuration. e.g. 1 */
    String INDEX_DOCUMENT_CRAWLER_QUEUE_number_of_replicas = "index.document.crawler.queue.number_of_replicas";

    /** The key of the configuration. e.g. 1 */
    String INDEX_DOCUMENT_CRAWLER_DATA_number_of_replicas = "index.document.crawler.data.number_of_replicas";

    /** The key of the configuration. e.g. 1 */

    return result;
  }

  /**
   * Returns an array containing all of the elements in the specified collection; the runtime type
   * of the returned array is that of the specified array. If the collection fits in the specified
   * array, it is returned therein. Otherwise, a new array is allocated with the runtime type of the
   * specified array and the size of the specified collection.
   *