Function: gnus-article-sort-extract-extra
gnus-article-sort-extract-extra is a byte-compiled function defined in
gnus-sum.el.gz.
Signature
(gnus-article-sort-extract-extra NAME HEADER)
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/gnus-sum.el.gz
(defsubst gnus-article-sort-extract-extra (name header)
(let ((extract
(funcall gnus-extract-address-components
(or (cdr (assq name (mail-header-extra header)))
""))))
(or (car extract) (cadr extract))))