Variable: outline--comment-regexp
outline--comment-regexp is a buffer-local variable defined in
outline.el.gz.
Documentation
Regexp whose group 1 gives the level of a comment-prefixed heading.
Set by outline--setup-from-comment-regexp and used by
outline--comment-level.
Source Code
;; Defined in /usr/src/emacs/lisp/outline.el.gz
(defvar-local outline--comment-regexp nil
"Regexp whose group 1 gives the level of a comment-prefixed heading.
Set by `outline--setup-from-comment-regexp' and used by
`outline--comment-level'.")