custom-theme-p - eiel-emacs

custom-theme-p

#emacs28.2 #custom

https://github.com/emacs-mirror/emacs/blob/emacs-28.2/lisp/custom.el#L871-L873

code: custom.el

(defsubst custom-theme-p (theme)

"Non-nil when THEME has been defined."

(memq theme custom-known-themes))

custom-known-themes