(;; Define the STRUCTURE-OBJECT class as a subclass of
;; INSTANCE. This has to be handled early because the design of the
;; DEFSTRUCT system, dating back to pre-1999 CMU CL, requires that
(;; Define the STRUCTURE-OBJECT class as a subclass of
;; INSTANCE. This has to be handled early because the design of the
;; DEFSTRUCT system, dating back to pre-1999 CMU CL, requires that