return emptySet();
  }

  protected Collection<Method> suppressForUnmodifiableSortedMap() {
    return emptySet();
  }

  protected Collection<Method> suppressForEnumMap() {
    return emptySet();
  }

  protected Collection<Method> suppressForConcurrentHashMap() {
    return emptySet();
  }

  protected Collection<Method> suppressForConcurrentSkipListMap() {