@Override
  public void fromData(DataInput in) throws IOException, ClassNotFoundException {
    super.fromData(in);
    functorId = DataSerializer.readPrimitiveShort(in);
  }
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/FunctionDecoratorImpl.java