*
 * @author Ben Yu
 */
@GwtIncompatible
@J2ktIncompatible
@NullMarked
abstract class DummyProxy {

  /**
   * Returns a new proxy for {@code interfaceType}. Proxies of the same interface are equal to each
   * other if the {@link DummyProxy} instance that created the proxies are equal.
   */
  final <T> T newProxy(TypeToken<T> interfaceType) {

 *
 * @author Ben Yu
 */
@GwtIncompatible
@J2ktIncompatible
@NullMarked
abstract class DummyProxy {

  /**
   * Returns a new proxy for {@code interfaceType}. Proxies of the same interface are equal to each
   * other if the {@link DummyProxy} instance that created the proxies are equal.
   */
  final <T> T newProxy(TypeToken<T> interfaceType) {

      super(factory + " returns null and cannot be used to test instance methods.");
    }
  }

  private static final class SerializableDummyProxy extends DummyProxy implements Serializable {

    private final transient ClassSanityTester tester;

    SerializableDummyProxy(ClassSanityTester tester) {
      this.tester = tester;
    }

    @Override

    } else {
      return TypeToken.of(Object.class);
    }
  }

  private <T> T newDefaultReturningProxy(TypeToken<T> type) {
    return new DummyProxy() {
      @Override
      <R> @Nullable R dummyReturnValue(TypeToken<R> returnType) {
        return getDefaultValue(returnType);
      }
    }.newProxy(type);
  }

      super(factory + " returns null and cannot be used to test instance methods.");
    }
  }

  private static final class SerializableDummyProxy extends DummyProxy implements Serializable {

    private final transient ClassSanityTester tester;

    SerializableDummyProxy(ClassSanityTester tester) {
      this.tester = tester;
    }

    @Override