.suppressing(suppressForConcurrentSkipListSetWithComparator())
        .createTestSuite();
  }

  private static String[] dedupe(String[] elements) {
    Set<String> tmp = new LinkedHashSet<>();
    Collections.addAll(tmp, elements);
    return tmp.toArray(new String[0]);
  }

  static <T> Comparator<T> arbitraryNullFriendlyComparator() {
    return new NullFriendlyComparator<>();
  }

        .suppressing(suppressForConcurrentSkipListSetWithComparator())
        .createTestSuite();
  }

  private static String[] dedupe(String[] elements) {
    Set<String> tmp = new LinkedHashSet<>();
    Collections.addAll(tmp, elements);
    return tmp.toArray(new String[0]);
  }

  static <T> Comparator<T> arbitraryNullFriendlyComparator() {
    return new NullFriendlyComparator<>();
  }