@Override
  public void toData(DataOutput out,
      SerializationContext context) throws IOException {
    super.toData(out);
    context.getSerializer().writeObject(lowerLimit, out);
    context.getSerializer().writeObject(upperLimit, out);
  }
This eval just applies to a single value or the 1st value in params
geode-core/src/main/java/org/apache/geode/internal/admin/statalerts/GaugeThresholdDecoratorImpl.java