@Override
  public void toData(DataOutput out,
      SerializationContext context) throws IOException {
    super.toData(out, context);
    DataSerializer.writeObject(proxyID, out);
  }
Distribution message for dropping client from denylist.

@since GemFire 6.0
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/RemoveClientFromDenylistMessage.java