Function: custom-theme-p
custom-theme-p is a byte-compiled function defined in custom.el.gz.
Signature
(custom-theme-p THEME)
Documentation
Non-nil when THEME has been defined.
Source Code
;; Defined in /usr/src/emacs/lisp/custom.el.gz
(defsubst custom-theme-p (theme)
"Non-nil when THEME has been defined."
(memq theme custom-known-themes))