assertEquals(4, (int) range.lowerEndpoint());
    assertEquals(OPEN, range.lowerBoundType());
    assertTrue(range.hasUpperBound());
    assertEquals(8, (int) range.upperEndpoint());
    assertEquals(OPEN, range.upperBoundType());
    assertFalse(range.isEmpty());
    assertEquals("(4..8)", range.toString());
    reserializeAndAssert(range);
  }

  public void testOpen_invalid() {
    try {
      Range.open(4, 3);
      fail();

    BoundType upperBoundType = range.hasUpperBound() ? range.upperBoundType() : OPEN;
    return new GeneralRange<>(
        Ordering.natural(),
        range.hasLowerBound(),
        lowerEndpoint,
        lowerBoundType,
        range.hasUpperBound(),
        upperEndpoint,
        upperBoundType);
  }

  /** Returns the whole range relative to the specified comparator. */

    BoundType upperBoundType = range.hasUpperBound() ? range.upperBoundType() : OPEN;
    return new GeneralRange<>(
        Ordering.natural(),
        range.hasLowerBound(),
        lowerEndpoint,
        lowerBoundType,
        range.hasUpperBound(),
        upperEndpoint,
        upperBoundType);
  }

  /** Returns the whole range relative to the specified comparator. */

      @ParametricNullness E lowerBound,
      BoundType lowerBoundType,
      @ParametricNullness E upperBound,
      BoundType upperBoundType) {
    return Multisets.unmodifiableSortedMultiset(
        delegate().subMultiset(lowerBound, lowerBoundType, upperBound, upperBoundType));
  }

  @Override
  public SortedMultiset<E> tailMultiset(@ParametricNullness E lowerBound, BoundType boundType) {

  public SortedMultiset<E> subMultiset(
      @ParametricNullness E lowerBound,
      BoundType lowerBoundType,
      @ParametricNullness E upperBound,
      BoundType upperBoundType) {
    return delegate().subMultiset(lowerBound, lowerBoundType, upperBound, upperBoundType);
  }

  /**
   * A sensible definition of {@link #subMultiset(Object, BoundType, Object, BoundType)} in terms of

    assertEquals(4, (int) range.lowerEndpoint());
    assertEquals(OPEN, range.lowerBoundType());
    assertTrue(range.hasUpperBound());
    assertEquals(8, (int) range.upperEndpoint());
    assertEquals(OPEN, range.upperBoundType());
    assertFalse(range.isEmpty());
    assertEquals("(4..8)", range.toString());
    reserializeAndAssert(range);
  }

  public void testOpen_invalid() {
    try {
      Range.open(4, 3);
      fail();

  }

  @Override
  public SortedMultiset<E> subMultiset(
      E lowerBound, BoundType lowerBoundType, E upperBound, BoundType upperBoundType) {
    return delegate().subMultiset(lowerBound, lowerBoundType, upperBound, upperBoundType);
  }

  /**
   * A sensible definition of {@link #subMultiset(Object, BoundType, Object, BoundType)} in terms of

  public SortedMultiset<E> subMultiset(
      @ParametricNullness E lowerBound,
      BoundType lowerBoundType,
      @ParametricNullness E upperBound,
      BoundType upperBoundType) {
    return delegate().subMultiset(lowerBound, lowerBoundType, upperBound, upperBoundType);
  }

  /**
   * A sensible definition of {@link #subMultiset(Object, BoundType, Object, BoundType)} in terms of

  }

  @Override
  public SortedMultiset<E> subMultiset(
      E lowerBound, BoundType lowerBoundType, E upperBound, BoundType upperBoundType) {
    return Multisets.unmodifiableSortedMultiset(
        delegate().subMultiset(lowerBound, lowerBoundType, upperBound, upperBoundType));
  }

  @Override
  public SortedMultiset<E> tailMultiset(E lowerBound, BoundType boundType) {

      return standardPollLastEntry();
    }

    @Override
    public SortedMultiset<E> subMultiset(
        E lowerBound, BoundType lowerBoundType, E upperBound, BoundType upperBoundType) {
      return standardSubMultiset(lowerBound, lowerBoundType, upperBound, upperBoundType);
    }

    @Override
    public int count(@Nullable Object element) {
      return standardCount(element);
    }

    @Override