@Override
    public Set<ConfigOption<?>> requiredOptions() {
        Set<ConfigOption<?>> options = new HashSet<>();
        options.add(INNER_FORMAT);
        return options;
    }
factory class for inLong msg format
inlong-sort/sort-formats/format-row/format-inlongmsg-base/src/main/java/org/apache/inlong/sort/formats/inlongmsg/row/InLongMsgFormatFactory.java