Rendering Surface Bounds determination

Good day, simple question. In TextKit2, there seems to be a Rendering Surface Bounds property.

We currently have a text.boundingRect(with...) function call to determine some bounding properties, and this is the accepted proposal for most bounding retrieval, but I am not sure the operation is actually the Rendering Surface Bounds of a provided text, as described in the video.

So ... let say I have such a text, and I want to get that fully enclosing bounds, what would be my best bet (cross-platform)

Rendering Surface Bounds determination
 
 
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