*
   * @since 21.0
   */
  public static <T extends @Nullable Object, K, V>
      Collector<T, ?, ImmutableListMultimap<K, V>> toImmutableListMultimap(
          Function<? super T, ? extends K> keyFunction,
          Function<? super T, ? extends V> valueFunction) {
    return CollectCollectors.toImmutableListMultimap(keyFunction, valueFunction);
  }

  /**

  public static <T extends @Nullable Object, K, V>
      Collector<T, ?, ImmutableListMultimap<K, V>> toImmutableListMultimap(
          Function<? super T, ? extends K> keyFunction,
          Function<? super T, ? extends V> valueFunction) {
    return CollectCollectors.toImmutableListMultimap(keyFunction, valueFunction);
  }

  /**

        ImmutableRangeMap.Builder::combine,
        ImmutableRangeMap.Builder::build);
  }

  // Multimaps

  static <T extends @Nullable Object, K, V>
      Collector<T, ?, ImmutableListMultimap<K, V>> toImmutableListMultimap(
          Function<? super T, ? extends K> keyFunction,
          Function<? super T, ? extends V> valueFunction) {
    checkNotNull(keyFunction, "keyFunction");
    checkNotNull(valueFunction, "valueFunction");

        ImmutableRangeMap.Builder::combine,
        ImmutableRangeMap.Builder::build);
  }

  // Multimaps

  static <T extends @Nullable Object, K, V>
      Collector<T, ?, ImmutableListMultimap<K, V>> toImmutableListMultimap(
          Function<? super T, ? extends K> keyFunction,
          Function<? super T, ? extends V> valueFunction) {
    checkNotNull(keyFunction, "keyFunction");
    checkNotNull(valueFunction, "valueFunction");

    }
  }

  public void testToImmutableListMultimap() {
    Collector<Entry<String, Integer>, ?, ImmutableListMultimap<String, Integer>> collector =
        ImmutableListMultimap.toImmutableListMultimap(Entry::getKey, Entry::getValue);
    BiPredicate<ImmutableListMultimap<?, ?>, ImmutableListMultimap<?, ?>> equivalence =
        Equivalence.equals()