const have been added in object parameter of two legacy APIs to fit
Eolian generated files.
Since these functions retrieve information from object, it is logic that
the object would be const.
You can add in the .eo file the eo_prefix:... and data:... in case
you want to override respectively the Eo prefix and the data type.
If "data: null" is used, no data type will be added.
Daniel Kolesa
Yossi Kantor
Daniel Zaoui