public void testGetSupertype_withTypeVariable() {
    ParameterizedType expectedType =
        Types.newParameterizedType(
            Iterable.class,
            Types.newParameterizedType(List.class, ListIterable.class.getTypeParameters()[0]));
    assertEquals(
        expectedType, TypeToken.of(ListIterable.class).getSupertype(Iterable.class).getType());
  }

      .addInterceptor(new GzipRequestInterceptor())
      .build();
  private final Moshi moshi = new Moshi.Builder().build();
  private final JsonAdapter<Map<String, String>> mapJsonAdapter = moshi.adapter(
      Types.newParameterizedType(Map.class, String.class, String.class));

  public void run() throws Exception {
    Map<String, String> requestBody = new LinkedHashMap<>();

   * {@code ownerType}.
   */
  static ParameterizedType newParameterizedTypeWithOwner(
      @Nullable Type ownerType, Class<?> rawType, Type... arguments) {
    if (ownerType == null) {
      return newParameterizedType(rawType, arguments);
    }
    // ParameterizedTypeImpl constructor already checks, but we want to throw NPE before IAE
    checkNotNull(arguments);

   * {@code ownerType}.
   */
  static ParameterizedType newParameterizedTypeWithOwner(
      @Nullable Type ownerType, Class<?> rawType, Type... arguments) {
    if (ownerType == null) {
      return newParameterizedType(rawType, arguments);
    }
    // ParameterizedTypeImpl constructor already checks, but we want to throw NPE before IAE
    checkNotNull(arguments);

    Type getGenericReturnType() {
      Class<?> declaringClass = getDeclaringClass();
      TypeVariable<?>[] typeParams = declaringClass.getTypeParameters();
      if (typeParams.length > 0) {
        return Types.newParameterizedType(declaringClass, typeParams);
      } else {
        return declaringClass;
      }
    }

    @Override
    Type[] getGenericParameterTypes() {