@Override
  public void fromData(DataInput in,
      DeserializationContext context) throws IOException, ClassNotFoundException {
    super.fromData(in, context);
    regionToDispatchedKeysMap = DataSerializer.readHashMap(in);
  }
Removes a batch of events from the remote secondary queues

@since GemFire 8.0
geode-core/src/main/java/org/apache/geode/internal/cache/wan/parallel/ParallelQueueRemovalMessage.java