public List<String> getFinishedSplits() {
        return finishedSplits;
    }
The {@link SourceEvent} that {@link IncrementalSourceEnumerator} sends to {@link
IncrementalSourceReader} to notify the finished snapshot splits has been received, i.e.
acknowledge for {@link FinishedSnapshotSplitsReportEvent}.
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/meta/events/FinishedSnapshotSplitsAckEvent.java