private void handleLatestFinishedSplitSizeRequest(int subTask) {
        if (splitAssigner instanceof MySqlHybridSplitAssigner) {
            context.sendEventToSourceReader(
                    subTask,
                    new LatestFinishedSplitsSizeEvent(
                            splitAssigner.getFinishedSplitInfos().size()));
        }
    }
A MySQL CDC source enumerator that enumerates receive the split request and assign the split to
source readers.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/cdc/mysql/source/enumerator/MySqlSourceEnumerator.java