[PEAK] Trellis shared cells

[Jeffrey Harris]

Hi Phillip,

> Yes, I'd been thinking of doing just that (as Sergey said).
> 
> But I would caution that use cases that seem to call for modifying a
> cell in this fashion may have other, cleaner ways to be handled anyway. 
> Perhaps you could elaborate on the use case?

Agreed, I got distracted by wanting to see how shared cells would work
in this case, but really, I didn't need shared cells, it's cleaner
without them.

Sincerely,
Jeffrey