if (rawType.equals(Predicate.class)) {
      return (Predicate<Object>) v -> (boolean) getDefaultValue(TypeToken.of(boolean.class));
    } else if (rawType.equals(IntFunction.class)) {
      try {
        Method method = IntFunction.class.getMethod("apply", int.class);
        return (IntFunction<Object>) v -> getDefaultValue(type.method(method).getReturnType());
      } catch (NoSuchMethodException e) {

    @Nullable Object[] args = new Object[params.size()];

    for (int i = 0; i < args.length; i++) {
      Parameter param = params.get(i);
      if (i != indexOfParamToSetToNull) {
        args[i] = getDefaultValue(param.getType());
        Assert.assertTrue(
            "Can't find or create a sample instance for type '"
                + param.getType()

    @Nullable Object[] args = new Object[params.size()];

    for (int i = 0; i < args.length; i++) {
      Parameter param = params.get(i);
      if (i != indexOfParamToSetToNull) {
        args[i] = getDefaultValue(param.getType());
        Assert.assertTrue(
            "Can't find or create a sample instance for type '"
                + param.getType()

                    listPromptBuilder
                            .newItem()
                            .name(
                                    option.getDefaultValue().isPresent()
                                            ? option.getDefaultValue().get()
                                            : option.getKey())
                            .text(option.getDescription())
                            .add();

                .filter(p -> p.getDefaultValue() != null || p.getExpression() != null)
                .map(p -> XmlNode.newInstance(
                        p.getName(),
                        p.getExpression(),
                        p.getDefaultValue() != null
                                ? Collections.singletonMap("default-value", p.getDefaultValue())
                                : null,

            return defaultValue != null ? defaultValue.toString() : StringUtil.EMPTY;
        } catch (final Exception e) {
            return StringUtil.EMPTY;
        }
    }

    private String getDefaultMaxKey() {
        try {
            final Method method = CustomSize.class.getMethod("maxKey");
            final Object defaultValue = method.getDefaultValue();

        try {
            final Method method = UriType.class.getMethod("protocolType");
            assertNotNull(method, "protocolType method should exist");
            assertNull(method.getDefaultValue(), "protocolType should not have default value");
        } catch (final NoSuchMethodException e) {
            fail("protocolType method should exist");
        }
    }