iTunes sync and offline playlist files

[rupertn]

How do I view my offline, saved, Spotfiy playlist files when my iPhone is connected to iTunes?

I've can see the bar graph at the bottom of the iTunes viewer that says I've got 3gig of "audio" and 1 gig of "other" but the spotify files are not visible in the music folder, that's in the drop down menu under "devices".

Thanks