Rule classes of a theorem.
(classes thm wrld) → classes
See classes+ for an enhanced variant of this utility.
Function:
(defun classes (thm wrld) (declare (xargs :guard (and (symbolp thm) (plist-worldp wrld)))) (let ((__function__ 'classes)) (declare (ignorable __function__)) (getpropc thm 'classes nil wrld)))