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

    assertThrows(
        IllegalArgumentException.class,
        () -> filtered.putAll(ImmutableMap.of("c", 3, "zzz", 4, "b", 5)));

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

  public void testFilteredKeysFilteredReflectsBackingChanges() {

  }

  // 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() {
    assertThrows(UnsupportedOperationException.class, () -> table.put("foo", 1, 'a'));
    assertSize(0);
  }

  @Override

    /**
     * Copies all of the mappings from the specified map to this map.
     *
     * @param m the mappings to be stored in this map
     */
    @Override
    public void putAll(final Map<? extends String, ? extends Object> m) {
        parent.putAll(m);
    }

    /**
     * Removes all of the mappings from this map.
     */
    @Override
    public void clear() {
        parent.clear();
    }

  @Override
  public @Nullable V put(K key, V value) {
    return delegate.put(checkValid(key), value);
  }

  @Override
  public void putAll(Map<? extends K, ? extends V> map) {
    for (K key : map.keySet()) {
      checkValid(key);
    }
    delegate.putAll(map);
  }

  @Override
  public @Nullable V remove(Object key) {
    return delegate.remove(checkValid(key));
  }

  @Override

      super.put(entry);
      return this;
    }

    @CanIgnoreReturnValue
    @Override
    public Builder<K, V> putAll(Map<? extends K, ? extends V> map) {
      return putAll(map.entrySet());
    }

    @CanIgnoreReturnValue
    @Override
    public Builder<K, V> putAll(Iterable<? extends Entry<? extends K, ? extends V>> entries) {
      for (Entry<? extends K, ? extends V> entry : entries) {
        put(entry);

    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));

     * @throws ClassCastException if any value is not an instance of the type specified by its key
     */
    @CanIgnoreReturnValue
    public <T extends B> Builder<B> putAll(Map<? extends Class<? extends T>, ? extends T> map) {
      for (Entry<? extends Class<? extends T>, ? extends T> entry : map.entrySet()) {
        Class<? extends T> type = entry.getKey();
        T value = entry.getValue();

        @ParametricNullness R columnKey,
        @ParametricNullness V value) {
      return original.put(columnKey, rowKey, value);
    }

    @Override
    public void putAll(Table<? extends C, ? extends R, ? extends V> table) {
      original.putAll(transpose(table));
    }

    @Override
    public @Nullable V remove(@Nullable Object rowKey, @Nullable Object columnKey) {
      return original.remove(columnKey, rowKey);

        return value;
      }

      alertListenerIfPresent(castKey, value, RemovalCause.EXPIRED);
    }
    return null;
  }

  @Override
  public void putAll(Map<? extends K, ? extends V> m) {
    for (Entry<? extends K, ? extends V> entry : m.entrySet()) {
      put(entry.getKey(), entry.getValue());
    }
  }

  @Override
  public void clear() {