granite:class and granite:data for select?

[#1]

Hello,

I just finished watching this presentation: https://seminars.adobeconnect.com/p43ucnv6655/?proto=true

I am trying to add a granite:class property to my granite/ui/components/foundation/form/select widget.

I was able to add this to a textfield, but it doesn't appear to be working for the select field.

Can someone please advise on how to go about adding this property?

Thanks, Matt

[#2]

An example (with Granite UI - RadioGroup - granite:class and granite:data):

This is the markup in .content.xml:

This is the rendered DOM:

Good Luck...