how to "toggle-signature" display in pager?

[mike polniak]

        Many of the signatures are getting larger than the informational
part of the message. I would like to remove this clutter from the pager
with something like "toggle-signature" which would be analogous to toggling
the display of quoted material in the message with toggle-quoted.
        Anyone have a ready solution for this new "toggle-signature"
function?
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