How to add BS Spacing class?

I’m trying to add a Spacing class as described on Bootstrap page

I added “.pt-3” in PineGrow > Prop > Style + Add class
I was expecting PG to recognize the class from the list but no luck. Confused why this isn’t puling up as a bootstrap class.

Any ideas?

Figured it out… this class if for BS v4 :disappointed_relieved: