@Override
  public void toData(DataOutput out,
      SerializationContext context) throws IOException {
    super.toData(out, context);
    DataSerializer.writeObjectArray(_alerts, out);
  }
Distribution message to be sent to alert aggregator {@link StatAlertsAggregator} It wraps alert
objects{@link StatAlert}

@since GemFire 5.7
geode-core/src/main/java/org/apache/geode/internal/admin/remote/AlertsNotificationMessage.java