private static Object readProperty(GenericRowData row, int pos, StringData key) {
        final GenericMapData map = (GenericMapData) row.getMap(pos);
        if (map == null) {
            return null;
        }
        return map.get(key);
    }
List of metadata that can be read with this format.
inlong-sort/sort-formats/format-row/format-json-v1.15/src/main/java/org/apache/inlong/sort/formats/json/debezium/DebeziumJsonDecodingFormat.java