@GwtCompatible
@NullMarked
class LegacyComparable implements Comparable, Serializable {
  static final LegacyComparable X = new LegacyComparable("x");
  static final LegacyComparable Y = new LegacyComparable("y");
  static final LegacyComparable Z = new LegacyComparable("z");

  static final Iterable<LegacyComparable> VALUES_FORWARD = asList(X, Y, Z);
  static final Iterable<LegacyComparable> VALUES_BACKWARD = asList(Z, Y, X);

@GwtCompatible
@NullMarked
class LegacyComparable implements Comparable, Serializable {
  static final LegacyComparable X = new LegacyComparable("x");
  static final LegacyComparable Y = new LegacyComparable("y");
  static final LegacyComparable Z = new LegacyComparable("z");

  static final Iterable<LegacyComparable> VALUES_FORWARD = asList(X, Y, Z);
  static final Iterable<LegacyComparable> VALUES_BACKWARD = asList(Z, Y, X);

  public void testTreeMultimapNonGeneric() {
    TreeMultimap<LegacyComparable, LegacyComparable> multimap = TreeMultimap.create();
    assertEquals(ImmutableMultimap.of(), multimap);
    multimap.put(new LegacyComparable("foo"), new LegacyComparable("f"));
    multimap.put(new LegacyComparable("foo"), new LegacyComparable("o"));
    multimap.put(new LegacyComparable("foo"), new LegacyComparable("o"));

        ImmutableSortedSet.of(LegacyComparable.Z, LegacyComparable.Y);
    assertThat(set2).containsExactly(LegacyComparable.Y, LegacyComparable.Z);
  }

  public void testLegacyComparable_copyOf_collection() {
    ImmutableSortedSet<LegacyComparable> set =
        ImmutableSortedSet.copyOf(LegacyComparable.VALUES_BACKWARD);
    assertTrue(elementsEqual(LegacyComparable.VALUES_FORWARD, set));
  }

  public void testTreeMultimapNonGeneric() {
    TreeMultimap<LegacyComparable, LegacyComparable> multimap = TreeMultimap.create();
    assertEquals(ImmutableMultimap.of(), multimap);
    multimap.put(new LegacyComparable("foo"), new LegacyComparable("f"));
    multimap.put(new LegacyComparable("foo"), new LegacyComparable("o"));
    multimap.put(new LegacyComparable("foo"), new LegacyComparable("o"));

        ImmutableSortedSet.of(LegacyComparable.Z, LegacyComparable.Y);
    assertThat(set2).containsExactly(LegacyComparable.Y, LegacyComparable.Z);
  }

  public void testLegacyComparable_copyOf_collection() {
    ImmutableSortedSet<LegacyComparable> set =
        ImmutableSortedSet.copyOf(LegacyComparable.VALUES_BACKWARD);
    assertTrue(elementsEqual(LegacyComparable.VALUES_FORWARD, set));
  }

  }

  public void testTreeMapNonGeneric() {
    TreeMap<LegacyComparable, Integer> map = Maps.newTreeMap();
    assertEquals(emptyMap(), map);
    map.put(new LegacyComparable("foo"), 1);
    map.put(new LegacyComparable("bar"), 2);
    assertThat(map.keySet())
        .containsExactly(new LegacyComparable("bar"), new LegacyComparable("foo"))
        .inOrder();

  @J2ktIncompatible // TODO(b/148207871): Likewise, or once J2KT uses javac instead of Eclipse.
  public void testLegacyComparable() {
    Range<LegacyComparable> unused = Range.closed(LegacyComparable.X, LegacyComparable.Y);
  }

  private static final DiscreteDomain<Integer> UNBOUNDED_DOMAIN =
      new DiscreteDomain<Integer>() {
        @Override
        public Integer next(Integer value) {

  @J2ktIncompatible // TODO(b/148207871): Likewise, or once J2KT uses javac instead of Eclipse.
  public void testLegacyComparable() {
    Range<LegacyComparable> unused = Range.closed(LegacyComparable.X, LegacyComparable.Y);
  }

  private static final DiscreteDomain<Integer> UNBOUNDED_DOMAIN =
      new DiscreteDomain<Integer>() {
        @Override
        public Integer next(Integer value) {