@Override
  public void toData(DataOutput out,
      SerializationContext context) throws IOException {
    toDataPre_GEODE_1_6_0_0(out, context);
    DataSerializer.writeEnum(state, out);
  }
This can be removed once all commands are using ResultModel.
geode-core/src/main/java/org/apache/geode/management/internal/functions/CliFunctionResult.java