return compose(keyPredicate, Entry::getKey);
  }

  static <V extends @Nullable Object> Predicate<Entry<?, V>> valuePredicateOnEntries(
      Predicate<? super V> valuePredicate) {
    return compose(valuePredicate, Entry::getValue);
  }

  /**
   * Returns a map containing the mappings in {@code unfiltered} whose keys satisfy a predicate. The

    return compose(keyPredicate, Entry::getKey);
  }

  static <V extends @Nullable Object> Predicate<Entry<?, V>> valuePredicateOnEntries(
      Predicate<? super V> valuePredicate) {
    return compose(valuePredicate, Entry::getValue);
  }

  /**
   * Returns a map containing the mappings in {@code unfiltered} whose keys satisfy a predicate. The