+ (dletf (((described-object description) object))
+ (contextl::funcall-with-special-initargs
+ (loop
+ :for (key val) :on args :by #'cddr
+ :collect (list (find key (description-attributes description)
+ :key #'attribute-keyword)
+ :value val))
+ (lambda ()
+ (contextl::funcall-with-special-initargs
+ (let ((attribute (find-attribute description 'active-attributes)))
+ (when attribute
+ (loop for spec in (attribute-value attribute)
+ if (listp spec)
+ collect (cons (or
+ (find-attribute description (car spec))
+ (error "No attribute matching ~A" (car spec)))
+ (cdr spec)))))
+ (lambda ()
+ (call-next-method))))))))
+