Powerpoint - Getting the original Shape from inside a Placeholder (programatically)

Question

I'll give an example with a SmartArt Shape, but it could be asked about other shapes too.

When I go over Slide.Shapes, one of the Shapes has:

Shape.Type=msoPlaceholder and Shape.PlaceholderFormat.ContainedType=msoSmartArt

Is there a way to get to the actual SmartArt Shape contained in the placeholder?

Thanks, Arie