Set<Feature<?>> features = newHashSet(FOO);
    assertThat(addImpliedFeatures(features)).isSameInstanceAs(features);
  }

  public void testAddImpliedFeatures_addsImpliedFeatures() {
    assertThat(addImpliedFeatures(newHashSet(FOO))).containsExactly(FOO);

    assertThat(addImpliedFeatures(newHashSet(IMPLIES_IMPLIES_FOO)))
        .containsExactly(IMPLIES_IMPLIES_FOO, IMPLIES_FOO, FOO);

  public void testSimpleTypeToken() {
    Foo<String, Integer> foo = new Foo<String, Integer>() {};
    assertEquals(String.class, foo.getClassA());
    assertEquals(Integer.class, foo.getClassB());
    assertEquals(String[].class, foo.getArrayClassA());
    assertEquals(Integer[].class, foo.getArrayClassB());
  }

  public void testCompositeTypeToken() {
    Foo<String[], List<int[]>> foo = new Foo<String[], List<int[]>>() {};

  public void testSimpleTypeToken() {
    Foo<String, Integer> foo = new Foo<String, Integer>() {};
    assertEquals(String.class, foo.getClassA());
    assertEquals(Integer.class, foo.getClassB());
    assertEquals(String[].class, foo.getArrayClassA());
    assertEquals(Integer[].class, foo.getArrayClassB());
  }

  public void testCompositeTypeToken() {
    Foo<String[], List<int[]>> foo = new Foo<String[], List<int[]>>() {};

    map.put("foo", 1);
    map.put("bar", 2);
    map.put("quux", 3);

    map.remove("foo");
    assertThat(map.entrySet())
        .containsExactly(immutableEntry("bar", 2), immutableEntry("quux", 3))
        .inOrder();
  }

  public void testInsertionOrderAfterRemoveMiddle() {
    BiMap<String, Integer> map = HashBiMap.create();
    map.put("foo", 1);
    map.put("bar", 2);

    multimap.put("foo", 1);
    multimap.put("bar", 2);
    multimap.put("foo", 3);
    assertEquals(ImmutableSet.of(1, 3), multimap.get("foo"));
    assertEquals(2, multimap.expectedValuesPerKey);
  }

  public void testCreateFromMultimap() {
    HashMultimap<String, Integer> multimap = HashMultimap.create();
    multimap.put("foo", 1);
    multimap.put("bar", 2);
    multimap.put("foo", 3);

    multimap.put("foo", 1);
    multimap.put("bar", 2);
    multimap.put("foo", 3);
    assertEquals(ImmutableSet.of(1, 3), multimap.get("foo"));
    assertEquals(2, multimap.expectedValuesPerKey);
  }

  public void testCreateFromMultimap() {
    HashMultimap<String, Integer> multimap = HashMultimap.create();
    multimap.put("foo", 1);
    multimap.put("bar", 2);
    multimap.put("foo", 3);

    assertThat(LOWER_HYPHEN.to(LOWER_HYPHEN, "foo")).isEqualTo("foo");
    assertThat(LOWER_HYPHEN.to(LOWER_HYPHEN, "foo-bar")).isEqualTo("foo-bar");
  }

  public void testLowerHyphenToLowerUnderscore() {
    assertThat(LOWER_HYPHEN.to(LOWER_UNDERSCORE, "foo")).isEqualTo("foo");
    assertThat(LOWER_HYPHEN.to(LOWER_UNDERSCORE, "foo-bar")).isEqualTo("foo_bar");
  }

  public void testLowerHyphenToLowerCamel() {

    multiset.add("foo", 2);
    multiset.add("bar");
    assertEquals(3, multiset.size());
    assertEquals(2, multiset.count("foo"));
  }

  public void testCreateWithSize() {
    Multiset<String> multiset = HashMultiset.create(50);
    multiset.add("foo", 2);
    multiset.add("bar");
    assertEquals(3, multiset.size());
    assertEquals(2, multiset.count("foo"));
  }

                    public String @Nullable [] foo() { return new String[] {"some", null}; }
                }
            """
        ) {
            assertHasErrors(
                "Field nonFinalField: Nullability breaking change.",
                "Field finalField: From non-nullable to nullable breaking change.",
                "Method com.example.Source.foo(): From non-null returning to null returning breaking change."

      assertEquals((Character) 'c', table.get("foo", 3));
    }
  }

  public void testRowClearAndPut() {
    if (supportsRemove()) {
      table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
      Map<Integer, C> row = table.row("foo");
      assertEquals(ImmutableMap.of(1, 'a', 3, 'c'), row);
      table.remove("foo", 3);