@Override
    public void addSplits(Collection<SourceSplitBase> splits) {
        // we don't store the split, but will re-create stream split later
        isStreamSplitAssigned = false;
    }
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