assertEquals(ImmutableListMultimap.of(1, "one"), ImmutableListMultimap.of("one", 1).inverse());
    assertEquals(
        ImmutableListMultimap.of(1, "one", 2, "two"),
        ImmutableListMultimap.of("one", 1, "two", 2).inverse());
    assertEquals(
        ImmutableListMultimap.of("of", 'o', "of", 'f', "to", 't', "to", 'o').inverse(),
        ImmutableListMultimap.of('o', "of", 'f', "of", 't', "to", 'o', "to"));

    assertEquals(ImmutableListMultimap.of(1, "one"), ImmutableListMultimap.of("one", 1).inverse());
    assertEquals(
        ImmutableListMultimap.of(1, "one", 2, "two"),
        ImmutableListMultimap.of("one", 1, "two", 2).inverse());
    assertEquals(
        ImmutableListMultimap.of("of", 'o', "of", 'f', "to", 't', "to", 'o').inverse(),
        ImmutableListMultimap.of('o', "of", 'f', "of", 't', "to", 'o', "to"));

   */
  public static <K, V> ImmutableMultimap<K, V> of() {
    return ImmutableListMultimap.of();
  }

  /** Returns an immutable multimap containing a single entry. */
  public static <K, V> ImmutableMultimap<K, V> of(K k1, V v1) {
    return ImmutableListMultimap.of(k1, v1);
  }

  /** Returns an immutable multimap containing the given entries, in order. */

        .isEqualTo("atom+xml");
  }

  private static final ImmutableListMultimap<String, String> PARAMETERS =
      ImmutableListMultimap.of("a", "1", "a", "2", "b", "3");

  public void testGetParameters() {
    assertEquals(ImmutableListMultimap.of(), MediaType.parse("text/plain").parameters());
    assertEquals(
        ImmutableListMultimap.of("charset", "utf-8"),

        .that(setMultimapCopy)
        .isSameInstanceAs(setMultimap);

    ImmutableListMultimap<String, String> listMultimap = ImmutableListMultimap.of("k1", "v1");
    ImmutableMultimap<String, String> listMultimapCopy = ImmutableMultimap.copyOf(listMultimap);
    assertWithMessage("copyOf(ImmutableListMultimap) should not create a new instance")
        .that(listMultimapCopy)
        .isSameInstanceAs(listMultimap);

  }

  public void testIndex() {
    ImmutableListMultimap<Integer, String> expected =
        ImmutableListMultimap.<Integer, String>builder()
            .putAll(3, "one", "two")
            .put(5, "three")
            .put(4, "four")
            .build();
    ImmutableListMultimap<Integer, String> index =
        FluentIterable.from(asList("one", "two", "three", "four"))

    assertThat(unmod).isNotSameInstanceAs(mod);
    assertThat(Multimaps.unmodifiableListMultimap(unmod)).isSameInstanceAs(unmod);
    ImmutableListMultimap<String, Integer> immutable =
        ImmutableListMultimap.of("a", 1, "b", 2, "a", 3);
    assertThat(Multimaps.unmodifiableListMultimap(immutable)).isSameInstanceAs(immutable);

   *     keyFunction} produces {@code null} for any key
   * @since 10.0
   */
  public static <K, V> ImmutableListMultimap<K, V> index(
      Iterator<V> values, Function<? super V, K> keyFunction) {
    checkNotNull(keyFunction);
    ImmutableListMultimap.Builder<K, V> builder = ImmutableListMultimap.builder();
    while (values.hasNext()) {
      V value = values.next();
      checkNotNull(value, values);

   *     keyFunction} produces {@code null} for any key
   * @since 10.0
   */
  public static <K, V> ImmutableListMultimap<K, V> index(
      Iterator<V> values, Function<? super V, K> keyFunction) {
    checkNotNull(keyFunction);
    ImmutableListMultimap.Builder<K, V> builder = ImmutableListMultimap.builder();
    while (values.hasNext()) {
      V value = values.next();
      checkNotNull(value, values);

  public final <V> ImmutableMap<@NonNull E, V> toMap(Function<? super E, V> valueFunction) {
    return Maps.toMap((Iterable<@NonNull E>) getDelegate(), valueFunction);
  }

  /**
   * Creates an index {@code ImmutableListMultimap} that contains the results of applying a
   * specified function to each item in this {@code FluentIterable} of values. Each element of this