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+;;;; definition-macros.lisp
+
+(in-package :vampire)
+
+(defmacro defclass/bknr (name supers slotdefs &rest options)
+  "Defines a class using defclass/std syntax. Ensures that the class
+   is a sublcas of STORE-OBJECT with metaclass PERSISTENT-CLASS."
+  (let* ((include-store-object-p
+           (notany (lambda (c) (closer-mop:subclassp c 'store-object))
+                   supers))
+         (supers
+           (if include-store-object-p
+               `(store-object ,@supers)
+               supers)))
+    `(eval-when (:compile-toplevel)
+       (defclass/std ,name ,supers
+         ,slotdefs
+         (:metaclass persistent-class)
+         ,@options))))