Variable: gnus-group-change-level-function
gnus-group-change-level-function is a customizable variable defined in
gnus.el.gz.
Value
nil
Documentation
Function run when a group level is changed.
It is called with three parameters -- GROUP, LEVEL and OLDLEVEL.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/gnus.el.gz
(defcustom gnus-group-change-level-function nil
"Function run when a group level is changed.
It is called with three parameters -- GROUP, LEVEL and OLDLEVEL."
:group 'gnus-group-levels
:type '(choice (const nil)
function))