.forEach(s -> messages.addErrorsPropertyTypeDate(s, s)));
            }
            if (!fessConfig.validateIndexIntegerFields(doc)) {
                throwError.accept(messages -> fessConfig.invalidIndexIntegerFields(doc).stream().map(s -> "doc." + s)
                        .forEach(s -> messages.addErrorsPropertyTypeInteger(s, s)));

            propMap.put(INDEX_ADMIN_INTEGER_FIELD_SET, fieldSet);
        }
        return fieldSet;
    }

    default boolean validateIndexIntegerFields(final Map<String, Object> source) {
        return invalidIndexIntegerFields(source).isEmpty();
    }

    default List<String> invalidIndexIntegerFields(final Map<String, Object> source) {