:metaclasses-to-keep-effective-slots

Keyword

Default value:

(when (member (delivery-value :keep-clos) 

              '(t :full-dynamic-definition)) 

  :all)

If the value is a list, the elements are metaclasses whose classes retain their effective-slot-definitions. Value :all means all metaclasses.

LispWorks Delivery User Guide - 10 Aug 2017