}

    @Override
    @CheckForNull
    public V remove(@CheckForNull Object key) {
      synchronized (mutex) {
        return delegate().remove(key);
      }
    }

    @Override
    public boolean remove(@CheckForNull Object key, @CheckForNull Object value) {
      synchronized (mutex) {
        return delegate().remove(key, value);
      }
    }

    @Override

                    "loc": ["body", "files"],
                    "msg": "Field required",
                    "input": None,
                }
            ]
        }
    ) | IsDict(
        # TODO: remove when deprecating Pydantic v1
        {
            "detail": [
                {
                    "loc": ["body", "files"],
                    "msg": "field required",

        map.put("data1", 20);
        assertTrue(docBoostMatcher.match(map));

        map.put("data1", 5);
        assertFalse(docBoostMatcher.match(map));

        map.remove("data1");
        assertFalse(docBoostMatcher.match(map));

        map.put("data2", 5);
        assertFalse(docBoostMatcher.match(map));
    }

    public void test_string() {

    map.put(one, two);
    map.remove(one);
    assertNotified(listener, one, two, RemovalCause.EXPLICIT);

    map.put(two, three);
    map.remove(two, three);
    assertNotified(listener, two, three, RemovalCause.EXPLICIT);

    map.put(three, four);
    Iterator<?> i = map.entrySet().iterator();
    i.next();
    i.remove();
    assertNotified(listener, three, four, RemovalCause.EXPLICIT);

     */
    @Test
    public void testRemove() throws Exception {
        exception.expect(ClUnsupportedOperationException.class);
        exception.expectMessage(is("remove"));
        final ArrayIterator<String> itr = new ArrayIterator<String>("1", "2");
        itr.remove();
    }

                    "msg": "Input should be a valid integer, unable to parse string as an integer",
                    "input": "seventy",
                }
            ]
        }
    ) | IsDict(
        # TODO: remove when deprecating Pydantic v1
        {
            "detail": [
                {
                    "loc": ["body", "age"],
                    "msg": "value is not a valid integer",

                                    "title": "Q",
                                }
                            )
                            | IsDict(
                                # TODO: remove when deprecating Pydantic v1
                                {"title": "Q", "type": "string"}
                            ),
                            "name": "q",
                            "in": "query",

                "Item": {
                    "title": "Item",
                    "required": IsOneOf(
                        ["name", "description", "price", "tax"],
                        # TODO: remove when deprecating Pydantic v1
                        ["name", "price"],
                    ),
                    "type": "object",
                    "properties": {

    }

    @Override
    public Object put(final String key, final Object value) {
        return parent.put(key, value);
    }

    @Override
    public Object remove(final Object key) {
        return parent.remove(key);
    }

    @Override
    public void putAll(final Map<? extends String, ? extends Object> m) {
        parent.putAll(m);
    }

    @Override
    public void clear() {

   *
   * <p>Calls to {@code peek()} should not change the state of the iteration, except that it
   * <i>may</i> prevent removal of the most recent element via {@link #remove()}.
   *
   * @throws NoSuchElementException if the iteration has no more elements according to {@link
   *     #hasNext()}
   */
  @ParametricNullness
  E peek();

  /**
   * {@inheritDoc}
   *