Technically, you're not allowed to do that, according to
http://www.lispworks.com/documentation/HyperSpec/Body/11_abab.htm
19. Defining a method for a standardized generic function which is applicable when all of the arguments are direct instances of standardized classes.
Technically, you're not allowed to do that, according to
http:// www.lispworks. com/documentati on/HyperSpec/ Body/11_ abab.htm
19. Defining a method for a standardized generic function which is applicable when all of the arguments are direct instances of standardized classes.