WildcardType wildcard = (WildcardType) componentType;
      Type[] lowerBounds = wildcard.getLowerBounds();
      checkArgument(lowerBounds.length <= 1, "Wildcard cannot have more than one lower bounds.");
      if (lowerBounds.length == 1) {
        return supertypeOf(newArrayType(lowerBounds[0]));
      } else {
        Type[] upperBounds = wildcard.getUpperBounds();

  public void testNewArrayType_upperBoundedWildcard() {
    Type wildcard = Types.subtypeOf(Number.class);
    assertEquals(Types.subtypeOf(Number[].class), Types.newArrayType(wildcard));
  }

  public void testNewArrayType_lowerBoundedWildcard() {
    Type wildcard = Types.supertypeOf(Number.class);
    assertEquals(Types.supertypeOf(Number[].class), Types.newArrayType(wildcard));
  }

  public void testNewArrayType_serializable() {

  public void testNewArrayType_upperBoundedWildcard() {
    Type wildcard = Types.subtypeOf(Number.class);
    assertEquals(Types.subtypeOf(Number[].class), Types.newArrayType(wildcard));
  }

  public void testNewArrayType_lowerBoundedWildcard() {
    Type wildcard = Types.supertypeOf(Number.class);
    assertEquals(Types.supertypeOf(Number[].class), Types.newArrayType(wildcard));
  }

  public void testNewArrayType_serializable() {

   *       class. For example: {@code List<Integer>[] => List[]}.
   *   <li>If {@code T} is a type variable or a wildcard type, the raw type of the first upper bound
   *       is returned. For example: {@code <X extends Foo> => Foo}.
   * </ul>
   */
  public final Class<? super T> getRawType() {
    // For wildcard or type variable, the first bound determines the runtime type.
    Class<?> rawType = getRawTypes().iterator().next();

    }
  }

  // This is needed when resolving types against a context with wildcards
  // For example:
  // class Holder<T> {
  //   void set(T data) {...}
  // }
  // Holder<List<?>> should *not* resolve the set() method to set(List<?> data).
  // Instead, it should create a capture of the wildcard so that set() rejects any List<T>.
  private static class WildcardCapturer {

  }

  public void testGetGenericSuperclass_wildcard_boundIsClass() {
    assertEquals(
        TypeToken.of(Object.class),
        TypeToken.of(Types.subtypeOf(Object.class)).getGenericSuperclass());
    assertEquals(
        new TypeToken<Object[]>() {},
        TypeToken.of(Types.subtypeOf(Object[].class)).getGenericSuperclass());
  }

  public void testGetGenericSuperclass_wildcard_boundIsInterface() {

  public static final MediaType ANY_TYPE = createConstant(WILDCARD, WILDCARD);
  public static final MediaType ANY_TEXT_TYPE = createConstant(TEXT_TYPE, WILDCARD);
  public static final MediaType ANY_IMAGE_TYPE = createConstant(IMAGE_TYPE, WILDCARD);
  public static final MediaType ANY_AUDIO_TYPE = createConstant(AUDIO_TYPE, WILDCARD);
  public static final MediaType ANY_VIDEO_TYPE = createConstant(VIDEO_TYPE, WILDCARD);

    assertThat(Thread.interrupted()).isFalse();
    futureResult.cancel(true);
    assertThat(Thread.interrupted()).isFalse();
  }

  @J2ktIncompatible // Wildcard generics
  public void testWhenAllComplete_wildcard() throws Exception {
    ListenableFuture<?> futureA = immediateFuture("a");
    ListenableFuture<?> futureB = immediateFuture("b");
    ListenableFuture<?>[] futures = new ListenableFuture<?>[0];

    assertThat(Thread.interrupted()).isFalse();
    futureResult.cancel(true);
    assertThat(Thread.interrupted()).isFalse();
  }

  @J2ktIncompatible // Wildcard generics
  public void testWhenAllComplete_wildcard() throws Exception {
    ListenableFuture<?> futureA = immediateFuture("a");
    ListenableFuture<?> futureB = immediateFuture("b");
    ListenableFuture<?>[] futures = new ListenableFuture<?>[0];

 *     throw new IllegalArgumentException("Cannot contain type variable.");
 *   }
 *   protected void visitWildcardType(WildcardType t) {
 *     throw new IllegalArgumentException("Cannot contain wildcard type.");
 *   }
 * }.visit(type);
 * }</pre>
 *
 * <p>One {@code Type} is visited at most once. The second time the same type is visited, it's