Idea: Dependent Optionset Control / be able to group filtered values

Hi Andrew,

Thanks for your controls, really appreciate them !

I have a suggestion : to be able to group filtered values if needed.
Someone has done it here : https://pcf.gallery/grouped-optionset/ but there is no release and I am not sure it is possible to filter values.
Do you think this is something that could be interesting ? 

Thanks in advance.

Sébastien.