assertEquals(0, multiset.size());
    assertEquals(0, multiset.toArray().length);
    assertTrue(multiset.entrySet().isEmpty());
    assertFalse(multiset.iterator().hasNext());
    assertEquals(0, multiset.entrySet().size());
    assertEquals(0, multiset.entrySet().toArray().length);
    assertFalse(multiset.entrySet().iterator().hasNext());
  }

  public void testEmptyRangeSubMultisetSupportingAdd(SortedMultiset<E> multiset) {

  @MapFeature.Require(SUPPORTS_PUT)
  public void testAsMapEntrySetReflectsPutSameKey() {
    resetContainer(mapEntry(k0(), v0()), mapEntry(k0(), v3()));

    Set<Entry<K, Collection<V>>> asMapEntrySet = multimap().asMap().entrySet();
    Collection<V> valueCollection = getOnlyElement(asMapEntrySet).getValue();
    assertContentsAnyOrder(valueCollection, v0(), v3());
    assertTrue(multimap().put(k0(), v4()));

    for (Entry<K, V> entry : getMap().entrySet()) {
      assertThrows(NullPointerException.class, () -> entry.setValue(null));
      expectUnchanged();
    }
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  @CollectionSize.Require(absent = ZERO)
  public void testSetValueNullSupported() {
    for (Entry<K, V> entry : getMap().entrySet()) {
      if (entry.getKey().equals(k0())) {

                int idx = 0;
                for (Entry<K, V> e : map.entrySet()) {
                    entries[idx++] = new SimpleImmutableEntry<>(e.getKey(), e.getValue());
                }
            } else {
                entries = new Object[0];
            }
        }

        @Override
        public Set<Entry<K, V>> entrySet() {
            return new AbstractImmutableSet<>() {
                @Override

     *
     * TODO(cpovirk): decide what the best long-term action here is: force users
     * to suppress (as we do now), stop testing entrySet().add() at all, make
     * entrySet().add() tests tolerant of either behavior, introduce a map
     * feature for entrySet() that supports add(), or something else
     */
    return asList(
        getAddUnsupportedNotPresentMethod(),
        getAddAllUnsupportedNonePresentMethod(),

                  return map.entrySet().containsAll(c);
                }

                @Override
                public boolean removeAll(Collection<?> c) {
                  return map.entrySet().removeAll(c);
                }

                @Override
                public boolean retainAll(Collection<?> c) {
                  return map.entrySet().retainAll(c);
                }

                @Override

   */
  @Override
  NavigableSet<E> elementSet();

  /**
   * {@inheritDoc}
   *
   * <p>The {@code entrySet}'s iterator returns entries in ascending element order according to this
   * multiset's comparator.
   */
  @Override
  Set<Entry<E>> entrySet();

  /**
   * {@inheritDoc}
   *
   * <p>The iterator returns the elements in ascending order according to this multiset's
   * comparator.

   */
  @Override
  NavigableSet<E> elementSet();

  /**
   * {@inheritDoc}
   *
   * <p>The {@code entrySet}'s iterator returns entries in ascending element order according to this
   * multiset's comparator.
   */
  @Override
  Set<Entry<E>> entrySet();

  /**
   * {@inheritDoc}
   *
   * <p>The iterator returns the elements in ascending order according to this multiset's
   * comparator.

    public String toString() {
      return standardToString();
    }
  }

  @LazyInit private transient @Nullable Set<Entry<K, V>> entrySet;

  @Override
  public Set<Entry<K, V>> entrySet() {
    Set<Entry<K, V>> result = entrySet;
    return (result == null) ? entrySet = new EntrySet() : result;
  }

  private final class BiMapEntry extends ForwardingMapEntry<K, V> {
    private final Entry<K, V> delegate;

   */
  ALLOWS_NULL_VALUE_QUERIES,
  ALLOWS_NULL_VALUES(ALLOWS_NULL_VALUE_QUERIES),
  /**
   * The map does not throw {@code NullPointerException} on calls such as {@code
   * entrySet().contains(null)} or {@code entrySet().remove(null)}
   */
  ALLOWS_NULL_ENTRY_QUERIES,
  /**
   * The map does not throw {@code NullPointerException} on any {@code null} queries.
   *
   * @see #ALLOWS_NULL_KEY_QUERIES