Variable: hi-lock--unused-faces
hi-lock--unused-faces is a buffer-local variable defined in
hi-lock.el.gz.
Documentation
List of faces that is not used and is available for highlighting new text.
Face names from this list come from hi-lock-face-defaults.
Source Code
;; Defined in /usr/src/emacs/lisp/hi-lock.el.gz
(defvar-local hi-lock--unused-faces nil
"List of faces that is not used and is available for highlighting new text.
Face names from this list come from `hi-lock-face-defaults'.")