Looping through children objects in process email templates?

Hello Sugar lovers!

In Sugar BPM email templates, can you loops though children objects? Eg. send an automated email after an opportunity is closed won that includes all revenue line itemps with label, quantity and price. 

That could apply to any child object. 

I can do that in a PDF template or in wDocs, but I don't see how to do that in process email templates other than pre-calculating the field via code (Sugar logic Lont loop either). Any other idea?