private SourceSplitBase readSnapshotSplit(int splitVersion, DataInputDeserializer in)
            throws IOException {
        int splitBytesLen = in.readInt();
        byte[] splitBytes = new byte[splitBytesLen];
        in.read(splitBytes);
        return splitSerializer.deserialize(splitVersion, splitBytes);
    }
The {@link SimpleVersionedSerializer Serializer} for the {@link PendingSplitsState}.
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/state/PendingSplitsStateSerializer.java