anchor.diff:    ((universal nil)
      (prompter:name "Slots")
      (prompter:constructor (lambda (source)
  -                           (package-slots
  +                           (apply #'package-slots
                               (when (universal source)
                                 (list-all-packages))))))
     (:export-accessor-names-p t)
  
positive.code:   ((universal nil)
     (prompter:name "Functions")
     (prompter:constructor (lambda (source)
                             (package-functions
                              (when (universal source)
                                (list-all-packages))))))
    (:export-accessor-names-p t)
  
negative.code:   ((universal nil)
     (prompter:name "Classes")
     (prompter:constructor (lambda (source)
                             (apply #'package-classes
                              (when (universal source)
                                (list-all-packages))))))
    (:export-accessor-names-p t)
  