}

    @Override
    protected NavigableMap<K, V1> fromMap() {
      return (NavigableMap<K, V1>) super.fromMap();
    }
  }

  static <K extends @Nullable Object> Predicate<Entry<K, ?>> keyPredicateOnEntries(
      Predicate<? super K> keyPredicate) {
    return compose(keyPredicate, Entry::getKey);
  }

  static <V extends @Nullable Object> Predicate<Entry<?, V>> valuePredicateOnEntries(