* href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5045147">Sun bug 5045147</a> is fixed.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getCreateWithNullUnsupportedMethod() {
    return Helpers.getMethod(CollectionCreationTester.class, "testCreateWithNull_unsupported");
  }

        Class<?> optionalClass = Class.forName("java.util.Optional");
        /*
         * We don't *need* to use reflection to access Optional: It's available on all JDKs we
         * support, and Android code won't get this far, anyway, because ProcessHandle is
         * unavailable. But given how much other reflection we're using, we might as well use it
         * here, too, so that we don't need to also suppress an AndroidApiChecker error.

   * Returns {@link Method} instances for the read tests that assume multisets support duplicates so
   * that the test of {@code Multisets.forSet()} can suppress them.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static List<Method> getElementSetDuplicateInitializingMethods() {
    return Arrays.asList(
        Helpers.getMethod(

    assertEquals(Integer.MAX_VALUE, ms.tailMultiset("b", CLOSED).size());
    assertEquals(Integer.MAX_VALUE, ms.tailMultiset("a", CLOSED).size());
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  @AndroidIncompatible // Reflection bug, or actual binary compatibility problem?
  public void testElementSetBridgeMethods() {
    for (Method m : TreeMultiset.class.getMethods()) {

      return;
    }
    fail();
  }

  private static class BadEqualsFactory {
    /** oneConstantOnly matters now since it can be either null or the constant. */
    @SuppressWarnings("unused") // Called by reflection
    public static Object bad(String a, int b, @Nullable OneConstantEnum oneConstantOnly) {
      return new GoodEquals(a, b);
    }
  }

  public void testNullsOnReturnValues_good() throws Exception {

            .get());
    assertEquals(
        Integer.valueOf(5),
        reserialize(Suppliers.synchronizedSupplier(Suppliers.ofInstance(5))).get());
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  @SuppressWarnings("Java7ApiChecker") // includes test of Java 8+ API
  public void testSuppliersNullChecks() throws Exception {
    new ClassSanityTester()
        .setDefault(Duration.class, Duration.ofSeconds(1))

            .get());
    assertEquals(
        Integer.valueOf(5),
        reserialize(Suppliers.synchronizedSupplier(Suppliers.ofInstance(5))).get());
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  @SuppressWarnings("Java7ApiChecker") // includes test of Java 8+ API
  public void testSuppliersNullChecks() throws Exception {
    new ClassSanityTester()
        .setDefault(Duration.class, Duration.ofSeconds(1))

   * the other. Thus, we say the bug is in set(), which fails to support null.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getSetNullSupportedMethod() {
    return Helpers.getMethod(ListSetTester.class, "testSet_null");
  }

   * Description} annotation on the {@code GOLF} constant of enum {@code Sport}, use {@code
   * Enums.getField(Sport.GOLF).getAnnotation(Description.class)}.
   *
   * @since 12.0
   */
  @GwtIncompatible // reflection
  public static Field getField(Enum<?> enumValue) {
    Class<?>
        clazz = enumValue.getDeclaringClass();
    try {
      return clazz.getDeclaredField(enumValue.name());

   * can suppress it. See {@link CollectionAddTester#getAddNullSupportedMethod()} for details.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getAddNullSupportedMethod() {
    return Helpers.getMethod(ListAddAtIndexTester.class, "testAddAtIndex_nullSupported");
  }