@Override
  public void toData(DataOutput out,
      SerializationContext context) throws IOException {
    toDataPre_GEODE_1_9_0_0(out, context);
    DataSerializer.writeObject(eventID, out);
  }
@param recipients set of members who have the PartitionedRegion defined.
@param r the PartitionedRegion to destroy on each member
@return the response on which to wait for the confirmation
geode-core/src/main/java/org/apache/geode/internal/cache/DestroyPartitionedRegionMessage.java