@Override
    public void toData(DataOutput out,
        SerializationContext context) throws IOException {
      super.toData(out, context);
      out.writeInt(localMaxMemory);
      DataSerializer.writeObject(fixedPAttrs, out);
      out.writeInt(shutDownAllStatus);
    }
for internal use, required for DataSerializer.readObject
geode-core/src/main/java/org/apache/geode/internal/cache/partitioned/RegionAdvisor.java