public static <K, V> NavigableMapTestSuiteBuilder<K, V> using(
      TestSortedMapGenerator<K, V> generator) {
    NavigableMapTestSuiteBuilder<K, V> result = new NavigableMapTestSuiteBuilder<>();
    result.usingGenerator(generator);
    return result;
  }

  @SuppressWarnings("rawtypes") // class literals
  @Override
  protected List<Class<? extends AbstractTester>> getTesters() {

  public static <E> SortedMultisetTestSuiteBuilder<E> using(TestMultisetGenerator<E> generator) {
    SortedMultisetTestSuiteBuilder<E> result = new SortedMultisetTestSuiteBuilder<>();
    result.usingGenerator(generator);
    return result;
  }

  @Override
  public TestSuite createTestSuite() {
    withFeatures(KNOWN_ORDER);
    TestSuite suite = super.createTestSuite();