+ ;; NIL for empty, STRING for a docstring, SIMPLE-VECTOR for XREFS, and (CONS
+ ;; STRING SIMPLE-VECTOR) for both.
+ (info :init :null
+ :ref-trans %simple-fun-info
+ :ref-known (flushable)
+ :set-trans (setf %simple-fun-info)
+ :set-known (unsafe))