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From: "Lennart Borgman (gmail)" <lennart.borgman@gmail.com>
Newsgroups: gmane.emacs.devel
Subject: Retrieve front-advance from make-overlay
Date: Sun, 14 Jan 2007 22:04:44 +0100
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Xref: news.gmane.org gmane.emacs.devel:65198
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Is it possible to retrieve from an overlay the parameters front-advance 
and rear-advance that was given to make-overlay?

Without that it is not possible to make a new copy of an overlay AFAICS.