* which are not generally applicable to every instance of Map.
   *
   * @param map the map whose additional invariants to check.
   */
  protected void assertMoreInvariants(Map<K, V> map) {}

  public void testClear() {
    Map<K, V> map;
    try {
      map = makePopulatedMap();
    } catch (UnsupportedOperationException e) {
      return;
    }

    if (supportsClear) {
      map.clear();

   * which are not generally applicable to every instance of Map.
   *
   * @param map the map whose additional invariants to check.
   */
  protected void assertMoreInvariants(Map<K, V> map) {}

  public void testClear() {
    Map<K, V> map;
    try {
      map = makePopulatedMap();
    } catch (UnsupportedOperationException e) {
      return;
    }

    if (supportsClear) {
      map.clear();