Include example of use of presentation types.
user
```common lisp
(in-package :common-lisp-user)

(defpackage :app
  (:use :clim :clim-lisp)
  (:export #:app-main))

(in-package :app)

(define-application-frame superapp ()
  ()
  (:pointer-documentation t)
  (:panes
    (app :application :display-time t :height 300 :width 600)
    (int :interactor :height 200 :width 600))
  (:layouts
    (default (vertically () app int))))

(defun app-main ()
  (run-frame-top-level (make-application-frame 'superapp)))

(define-superapp-command (com-quit :name t) ()
  (frame-exit *application-frame*))

(define-presentation-type name-of-month ()
  :inherit-from 'string)

(define-presentation-type day-of-month ()
  :inherit-from 'integer)

(define-superapp-command (com-out :name t) ()
  (with-output-as-presentation (t "The third month" 'name-of-month)
    (format t "March~%"))
  (with-output-as-presentation (t 15 'day-of-month)
    (format t "fifteen~%")))

(define-superapp-command (com-get-date :name t)
    ((name 'name-of-month) (date 'day-of-month))
  (format (frame-standard-input *application-frame*)
	  "the ~a of ~a~%" date name))
```
assistant