.plus(String::class, "hello")
        .plus(Integer::class, 5 as Integer)
    assertThat(tags[String::class]).isEqualTo("hello")
    assertThat(tags[Integer::class]).isEqualTo(5)
  }

  /** The implementation retains no nodes from the original linked list. */
  @Test
  fun replaceFirstElement() {
    val tags =
      EmptyTags
        .plus(String::class, "a")
        .plus(Integer::class, 5 as Integer)

/**
 * Create integer sets for collection tests.
 *
 * @author Gregory Kick
 */
@GwtCompatible
@NullMarked
public abstract class TestIntegerSetGenerator implements TestSetGenerator<Integer> {
  @Override
  public SampleElements<Integer> samples() {
    return new Ints();
  }

  @Override
  public Set<Integer> create(Object... elements) {
    Integer[] array = new Integer[elements.length];

    @Override
    protected SortedSet<Integer> create(Integer[] elements) {
      return checkedCreate(nullCheckedTreeSet(elements));
    }
  }

  public static class ContiguousSetHeadsetGenerator extends AbstractContiguousSetGenerator {
    @Override
    protected SortedSet<Integer> create(Integer[] elements) {
      SortedSet<Integer> set = nullCheckedTreeSet(elements);

  }

  public void testOfEntriesNull() {
    Entry<@Nullable Integer, Integer> nullKey = entry(null, 23);
    assertThrows(
        NullPointerException.class,
        () -> ImmutableBiMap.ofEntries((Entry<Integer, Integer>) nullKey));
    Entry<Integer, @Nullable Integer> nullValue =
        ImmutableBiMapTest.<@Nullable Integer>entry(23, null);
    assertThrows(
        NullPointerException.class,

  public void testEmptyBuilder() {
    ImmutableSortedMap<String, Integer> map =
        ImmutableSortedMap.<String, Integer>naturalOrder().build();
    assertEquals(Collections.<String, Integer>emptyMap(), map);
  }

  public void testSingletonBuilder() {
    ImmutableSortedMap<String, Integer> map =
        ImmutableSortedMap.<String, Integer>naturalOrder().put("one", 1).build();
    assertMapEquals(map, "one", 1);
  }

      return makeArray(all).subArray(2, elements.length + 2).asList();
    }
  }

  @J2ktIncompatible
  @GwtIncompatible // used only from suite
  public static final class ImmutableIntArrayMiddleSubListAsListGenerator
      extends TestIntegerListGenerator {
    @Override
    protected List<Integer> create(Integer[] elements) {
      Integer[] prefix = {Integer.MIN_VALUE, Integer.MAX_VALUE};

        return this;
    }

    public void setDepth_Equal(Integer depth) {
        setDepth_Term(depth, null);
    }

    public void setDepth_Equal(Integer depth, ConditionOptionCall<TermQueryBuilder> opLambda) {
        setDepth_Term(depth, opLambda);
    }

    public void setDepth_Term(Integer depth) {
        setDepth_Term(depth, null);
    }

  }

  public void testMissingException() {
    List<Integer> emptyList = new ArrayList<>();

    IteratorTester<Integer> tester =
        new IteratorTester<Integer>(
            1, MODIFIABLE, emptyList, IteratorTester.KnownOrder.KNOWN_ORDER) {
          @Override
          protected Iterator<Integer> newTargetIterator() {
            return new Iterator<Integer>() {
              @Override

  public void testFilterUsingIteratorTester() {
    List<Integer> list = asList(1, 2, 3, 4, 5);
    Predicate<Integer> isEven =
        new Predicate<Integer>() {
          @Override
          public boolean apply(Integer integer) {
            return integer % 2 == 0;
          }
        };
    new IteratorTester<Integer>(
        5, UNMODIFIABLE, asList(2, 4), IteratorTester.KnownOrder.KNOWN_ORDER) {

  @J2ktIncompatible
  @GwtIncompatible // SerializableTester
  public void testForMapWithDefault_null_compareWithSerializable() {
    ImmutableMap<String, Integer> map = ImmutableMap.of("One", 1);
    Function<String, Integer> function = Functions.forMap(map, null);

    assertEquals((Integer) 1, function.apply("One"));
    assertThat(function.apply("Two")).isNull();

    // check basic sanity of equals and hashCode
    new EqualsTester()