#11 defgeneric has a :method option.

[Pascal J. Bourguignon]

defgeneric has a :method option, to define methods, but albert doesn't know it (yet):

; Warning: Unknown method option (method (up-sender option-code) (declare (ignorable up-sender option-code)) nil)
; While executing: lisp2csf::%create-method, in process repl-thread(13).