@Override
  public void fromData(DataInput in,
      DeserializationContext context) throws IOException, ClassNotFoundException {
    super.fromData(in, context);
    this.reason = DataSerializer.readInteger(in);
    this.regionToDuplicateEventsMap = DataSerializer.readHashMap(in);
  }
Sets events in the remote secondary queues to possible duplicate

@since Geode 1.15
geode-core/src/main/java/org/apache/geode/internal/cache/wan/parallel/ParallelQueueSetPossibleDuplicateMessage.java