.isTrue();
    if (!spec.suppressGetSubtype()) {
      assertThat(getSubtype(returnType, TypeToken.of(paramType).getRawType())).isEqualTo(paramType);
    }
    if (!spec.suppressGetSupertype()) {
      assertThat(getSupertype(paramType, TypeToken.of(returnType).getRawType()))
          .isEqualTo(returnType);
    }
    return sub;
  }

  /**

    boolean isParameterizedClass();

    /**
     * Returns the raw class.
     *
     * @param <T>
     *            the type of the raw class
     * @return the raw class
     * @see ParameterizedType#getRawType()
     */
    <T> Class<T> getRawClass();

    /**
     * Returns an array of {@link ParameterizedClassDesc} representing the type arguments.
     * <p>

    }

    // Since type variables aren't serializable, reduce the type down to raw type before
    // serialization.
        private Object writeReplace() {
      return new DummyHandler(TypeToken.of(interfaceType.getRawType()));
    }
  }

    }

    // Since type variables aren't serializable, reduce the type down to raw type before
    // serialization.
        private Object writeReplace() {
      return new DummyHandler(TypeToken.of(interfaceType.getRawType()));
    }
  }

      }
      Optional<Class<?>> supersWithPackagePrivateWriteReplace =
          FluentIterable.from(TypeToken.of(clazz).getTypes())
              .transform(TypeToken::getRawType)
              .transformAndConcat(c -> asList(c.getDeclaredMethods()))
              .firstMatch(
                  m ->
                      m.getName().equals("writeReplace")