LinkedListMultimap<K, V> create(Multimap<? extends K, ? extends V> multimap) {
    return new LinkedListMultimap<>(multimap);
  }

  LinkedListMultimap() {
    this(12);
  }

  private LinkedListMultimap(int expectedKeys) {
    keyToKeyList = Platform.newHashMapWithExpectedSize(expectedKeys);
  }

  private LinkedListMultimap(Multimap<? extends K, ? extends V> multimap) {

        .addEqualityGroup(
            LinkedListMultimap.create(), LinkedListMultimap.create(), LinkedListMultimap.create(1))
        .testEquals();
  }

  @GwtIncompatible // reflection
  public void testNulls() throws Exception {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicStaticMethods(LinkedListMultimap.class);
    tester.ignore(LinkedListMultimap.class.getMethod("get", Object.class));

  }

  public void testBuilderPutAllMultimap() {
    Multimap<String, Integer> toPut = LinkedListMultimap.create();
    toPut.put("foo", 1);
    toPut.put("bar", 4);
    toPut.put("foo", 2);
    toPut.put("foo", 3);
    Multimap<String, Integer> moreToPut = LinkedListMultimap.create();
    moreToPut.put("foo", 6);
    moreToPut.put("bar", 5);
    moreToPut.put("foo", 7);

  }

  public void testBuilderPutAllMultimap() {
    Multimap<String, Integer> toPut = LinkedListMultimap.create();
    toPut.put("foo", 1);
    toPut.put("bar", 4);
    toPut.put("foo", 2);
    toPut.put("foo", 3);
    Multimap<String, Integer> moreToPut = LinkedListMultimap.create();
    moreToPut.put("foo", 6);
    moreToPut.put("bar", 5);
    moreToPut.put("foo", 7);

  }

  public void testBuilderPutAllMultimap() {
    Multimap<String, Integer> toPut = LinkedListMultimap.create();
    toPut.put("foo", 1);
    toPut.put("bar", 4);
    toPut.put("foo", 2);
    toPut.put("foo", 3);
    Multimap<String, Integer> moreToPut = LinkedListMultimap.create();
    moreToPut.put("foo", 6);
    moreToPut.put("bar", 5);
    moreToPut.put("foo", 7);

        return ArrayListMultimap.create(contents);
      }
    },
    LinkedListMultimapImpl {
      @Override
      <K, V> ListMultimap<K, V> create(Multimap<K, V> contents) {
        return LinkedListMultimap.create(contents);
      }
    },
    ImmutableListMultimapImpl {
      @Override
      <K, V> ListMultimap<K, V> create(Multimap<K, V> contents) {
        return ImmutableListMultimap.copyOf(contents);

      implements TestListMultimapGenerator<String, Integer> {

    @Override
    public ListMultimap<String, Integer> create(Object... elements) {
      ListMultimap<String, Integer> multimap = LinkedListMultimap.create();
      for (Object o : elements) {
        @SuppressWarnings("unchecked")
        Entry<String, Integer> entry = (Entry<String, Integer>) o;
        multimap.put(entry.getKey(), entry.getValue());
      }

 * <h3>Implementations</h3>
 *
 * <ul>
 *   <li>{@link ImmutableListMultimap}
 *   <li>{@link ImmutableSetMultimap}
 *   <li>Configure your own mutable multimap with {@link MultimapBuilder}
 *   <li>{@link LinkedListMultimap} (for one unusual kind of mutable {@code Multimap})
 * </ul>
 *
 * Guava contains a number of other multimap implementations, such as {@link ArrayListMultimap}. In