@Override
    public void open(int parallelInstanceId, int parallelInstances) {
        super.open(parallelInstanceId, parallelInstances);
    }
the value field getters used to extract rowdata
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/kafka/src/main/java/org/apache/inlong/sort/kafka/partitioner/SingleTableCustomFieldsPartitioner.java