Function: advice-member-p
advice-member-p is a byte-compiled function defined in nadvice.el.gz.
Signature
(advice-member-p ADVICE SYMBOL)
Documentation
Return non-nil if ADVICE has been added to SYMBOL.
Instead of ADVICE being the actual function, it can also be the name
of the piece of advice.
Source Code
;; Defined in /usr/src/emacs/lisp/emacs-lisp/nadvice.el.gz
;;;###autoload
(defun advice-member-p (advice symbol)
"Return non-nil if ADVICE has been added to SYMBOL.
Instead of ADVICE being the actual function, it can also be the `name'
of the piece of advice."
(advice-function-member-p advice (advice--symbol-function symbol)))