Variable: gnus-summary-thread-gathering-function
gnus-summary-thread-gathering-function is a customizable variable
defined in gnus-sum.el.gz.
Value
gnus-gather-threads-by-subject
Documentation
Function used for gathering loose threads.
There are two pre-defined functions: gnus-gather-threads-by-subject,
which only takes Subjects into consideration; and
gnus-gather-threads-by-references, which compared the References
headers of the articles to find matches.
Probably introduced at or before Emacs version 19.32.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/gnus-sum.el.gz
(defcustom gnus-summary-thread-gathering-function
#'gnus-gather-threads-by-subject
"Function used for gathering loose threads.
There are two pre-defined functions: `gnus-gather-threads-by-subject',
which only takes Subjects into consideration; and
`gnus-gather-threads-by-references', which compared the References
headers of the articles to find matches."
:group 'gnus-thread
:type '(radio (function-item gnus-gather-threads-by-subject)
(function-item gnus-gather-threads-by-references)
(function :tag "other")))