public String getSplitId() {
        return splitId;
    }
The serialized metadata of stream split, it's serialized/deserialized by {@link
FinishedSnapshotSplitInfo#serialize()} and {@link
FinishedSnapshotSplitInfo#deserialize(byte[])}.
inlong-sort/sort-flink/cdc-base/src/main/java/org/apache/inlong/sort/cdc/base/source/meta/events/StreamSplitMetaEvent.java