[Seaside] Forcing a re-rendering of a portion of a page w/i a liveCallback..

[Rick Flower]

Hi all again..

I'm still working on my shopping cart code and have code that removes an 
item from the cart, but can't seem to find an easy way to redraw the 
cart contents via the liveCallback mechanism.. Currently the item to be 
deleted is removed from the cart but a reload of the page is necessary 
to see the updated cart contents.  I believe this is one of those things 
I'm not supposed to do in a callback -- if that's the case what are my 
options to achieve this sort of effect?