Does the hubble:icon Type Class work?

Update: I figured it out. This page had the instructions I was looking for: Documentation | Widgets > Apps and Files

This is my first time using Type Classes, and I’m testing the hubble:icon type class described here: Type classes. When I build an object table with a string column containing this sample image url (Color_icon_orange.png), the object table doesn’t show the custom icon. The object table does show a white square instead of the type’s default icon. Can someone please confirm if hubble:icon has not been deprecated, and if so, please advise on how to use it.