* Changes to the returned map, such as element removal, will update the underlying multimap. The
   * map does not support {@code setValue} on its entries, {@code put}, or {@code putAll}.
   *
   * <p>When passed a key that is present in the map, {@code asMap().get(Object)} has the same
   * behavior as {@link #get}, returning a live collection. When passed a key that is not present,

    Map<String, Integer> filtered = Maps.filterKeys(unfiltered, NOT_LENGTH_3);
    filtered.put("a", 1);
    filtered.put("b", 2);
    assertEquals(ImmutableMap.of("a", 1, "b", 2), filtered);

    try {
      filtered.putAll(ImmutableMap.of("c", 3, "zzz", 4, "b", 5));
      fail();
    } catch (IllegalArgumentException expected) {
    }

    assertEquals(ImmutableMap.of("a", 1, "b", 2), filtered);
  }

    Map<String, Integer> filtered = Maps.filterKeys(unfiltered, NOT_LENGTH_3);
    filtered.put("a", 1);
    filtered.put("b", 2);
    assertEquals(ImmutableMap.of("a", 1, "b", 2), filtered);

    try {
      filtered.putAll(ImmutableMap.of("c", 3, "zzz", 4, "b", 5));
      fail();
    } catch (IllegalArgumentException expected) {
    }

    assertEquals(ImmutableMap.of("a", 1, "b", 2), filtered);
  }

   * {@code put()} or {@code putAll()}, or {@code setValue()} on its entries.
   *
   * <p>In contrast, the maps returned by {@code rowMap().get()} have the same behavior as those
   * returned by {@link #row}. Those maps may support {@code setValue()}, {@code put()}, and {@code
   * putAll()}.
   *
   * @return a map view from each row key to a secondary map from column keys to values

    Map<String, Integer> moreToPut = new LinkedHashMap<>();
    moreToPut.put("four", 4);
    moreToPut.put("five", 5);

    ImmutableBiMap<String, Integer> map =
        new Builder<String, Integer>().putAll(toPut).putAll(moreToPut).build();
    assertMapEquals(map, "one", 1, "two", 2, "three", 3, "four", 4, "five", 5);
    assertMapEquals(map.inverse(), 1, "one", 2, "two", 3, "three", 4, "four", 5, "five");
  }

      assertTrue(Thread.holdsLock(mutex));
      return delegate.put(rowKey, columnKey, value);
    }

    @Override
    public void putAll(Table<? extends R, ? extends C, ? extends V> table) {
      assertTrue(Thread.holdsLock(mutex));
      delegate.putAll(table);
    }

    @Override
    public @Nullable V remove(Object rowKey, Object columnKey) {
      assertTrue(Thread.holdsLock(mutex));

  }

  // Null support depends on the underlying table and function.
  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  @Override
  public void testNullPointerInstance() {}

  // put() and putAll() aren't supported.
  @Override
  public void testPut() {
    try {
      table.put("foo", 1, 'a');
      fail("Expected UnsupportedOperationException");
    } catch (UnsupportedOperationException expected) {
    }

    Table<String, Integer, @NonNull C> other = HashBasedTable.create();
    other.put("foo", 1, cellValue('d'));
    other.put("bar", 2, cellValue('e'));
    other.put("cat", 2, cellValue('f'));
    table.putAll(other);
    assertEquals((Character) 'd', table.get("foo", 1));
    assertEquals((Character) 'b', table.get("bar", 1));
    assertEquals((Character) 'c', table.get("foo", 3));

   */
  public static <K extends Enum<K>, V extends Enum<V>> EnumBiMap<K, V> create(Map<K, V> map) {
    EnumBiMap<K, V> bimap =
        create(inferKeyTypeOrObjectUnderJ2cl(map), inferValueTypeOrObjectUnderJ2cl(map));
    bimap.putAll(map);
    return bimap;
  }

  private EnumBiMap(Class<K> keyTypeOrObjectUnderJ2cl, Class<V> valueTypeOrObjectUnderJ2cl) {
    super(

    try {
      map.put("b", "2");
      fail();
    } catch (UnsupportedOperationException expected) {
    }

    try {
      map.putAll(ImmutableMap.of("b", "2"));
      fail();
    } catch (UnsupportedOperationException expected) {
    }

    try {
      map.entrySet().iterator().next().setValue("one");
      fail();