@Override
    public void onFinishedSplits(Map<String, Offset> splitFinishedOffsets) {
        // do nothing
    }
Assigner for stream split.
Copy from com.ververica:flink-cdc-base:2.3.0.
inlong-sort/sort-flink/cdc-base/src/main/java/org/apache/inlong/sort/cdc/base/source/assigner/StreamSplitAssigner.java