using multiple Summary buffer formats

[alfred@GlobeSet.com (Alfred J Correira)]

I've been poking around in the documentation on the Summary buffer for a way to
do the following, but I just don't see how to do it simply.  Namely, I would
like to have one Summary buffer format for all my groups, except my outgoing
group (the GCC: group); I would like that one to use a format that displayed,
say, the first To: address rather than the usual From: (they're all from me,
after all :-).  It looks like perhaps I could make up my own function to bind
to the gnus-extract-address-components variable, one that checks for my GCC
group and does something different than the usual predefined functions when I'm
in that group, but that feels wrong to me somehow.  Am I missing some obvious
existing mechanism that supports what I want to do?

(This would for pgnus v0.69 ...)

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