docMap.put("key2", "value2");
        docMap.put("key3", "value3");

        Set<Map.Entry<String, Object>> entrySet = docMap.entrySet();
        assertEquals(3, entrySet.size());

        Set<Map.Entry<String, Object>> parentEntrySet = parentMap.entrySet();
        assertEquals(parentEntrySet, entrySet);
    }

    public void test_entrySet_with_lang_key() {
        Map<String, Object> parentMap = new LinkedHashMap<>();

    assertEquals(2, keys.count(k0()));
    assertEquals(1, keys.count(k1()));
    assertEquals(3, keys.size());
    assertContainsAllOf(keys, k0(), k1());
    assertContainsAllOf(
        keys.entrySet(), Multisets.immutableEntry(k0(), 2), Multisets.immutableEntry(k1(), 1));
  }

  @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
  public void testKeysCountAbsentNullKey() {
    assertEquals(0, multimap().keys().count(null));

   */
  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

    List<Entry<V, K>> reversedEntries = new ArrayList<>();
    for (Entry<K, V> entry : expected) {
      reversedEntries.add(reverseEntry(entry));
    }
    assertEqualIgnoringOrder(getMap().inverse().entrySet(), reversedEntries);

    for (Entry<K, V> entry : expected) {
      assertEquals(
          "Wrong key for value " + entry.getValue(),
          entry.getKey(),
          getMap().inverse().get(entry.getValue()));

        final HttpServletRequest req = (HttpServletRequest) request;
        final String servletPath = req.getServletPath();
        for (final Map.Entry<String, String> entry : encodingMap.entrySet()) {
            final String path = entry.getKey();
            if (servletPath.startsWith(path)) {
                req.setCharacterEncoding(entry.getValue());

    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) {

  }

  /**
   * A sensible definition of {@link #firstEntry()} in terms of {@code entrySet().iterator()}.
   *
   * <p>If you override {@link #entrySet()}, you may wish to override {@link #firstEntry()} to
   * forward to this implementation.
   */
  protected @Nullable Entry<E> standardFirstEntry() {
    Iterator<Entry<E>> entryIterator = entrySet().iterator();
    if (!entryIterator.hasNext()) {
      return null;
    }

    Set<Entry<Integer, Character>> entrySet = row.entrySet();
    assertTrue(entrySet.contains(immutableEntry(10, 'X')));
    assertTrue(entrySet.contains(immutableEntry(20, 'X')));
    assertFalse(entrySet.contains(immutableEntry(15, 'X')));
    entrySet = row.tailMap(15).entrySet();
    assertFalse(entrySet.contains(immutableEntry(10, 'X')));
    assertTrue(entrySet.contains(immutableEntry(20, 'X')));

      assertEquals(expectedEntrySetHash, entrySet.hashCode());
      assertTrue(entrySet.containsAll(new HashSet<Entry<K, V>>(entrySet)));
      assertTrue(entrySet.equals(new HashSet<Entry<K, V>>(entrySet)));
    }

    Object[] entrySetToArray1 = entrySet.toArray();
    assertEquals(map.size(), entrySetToArray1.length);
    assertTrue(asList(entrySetToArray1).containsAll(entrySet));

    for (Entry<K, V> entry : map.entrySet()) {
      assertEquals(entry.getKey() + "=" + entry.getValue(), entry.toString());
      assertEquals(entry.getKey(), bimap.inverse().get(entry.getValue()));
    }

    assertEquals("{" + JOINER.join(map.entrySet()) + "}", map.toString());
    assertEquals("[" + JOINER.join(map.entrySet()) + "]", map.entrySet().toString());