anchor.diff:  			       align-x align-y
   			       toward-x toward-y transform-glyphs))
   
  +;;;; 29.2.2 Pane Properties
  +
  +(defgeneric pane-frame (pane))
  +(defgeneric pane-name (pane))
  +(defgeneric pane-foreground (pane))
  +(defgeneric pane-background (pane))
  +(defgeneric pane-text-style (pane))
  +
  +;;;; 29.3.3 Scroller Pane Classes
  +
  +(defgeneric pane-viewport (pane))
  +(defgeneric pane-viewport-region (pane)) 
  +(defgeneric pane-scroller (pane)) 
  +(defgeneric scroll-extent (pane x y)) 
  +
   ;;;
   
   (defgeneric medium-foreground (medium))
  
positive.code: 
  (defgeneric transform-region (transformation region))
  
  ;; 8.3.4.1 Grafting and Degrafting of Mediums
  
  (defgeneric allocate-medium (port sheet))
  (defgeneric deallocate-medium (port medium))
  
negative.code: ;;;    Author: Gilbert Baumann <unk6@rz.uni-karlsruhe.de>
  ;;;   License: LGPL (See file COPYING for details).
  ;;; ---------------------------------------------------------------------------
  ;;;  (c) copyright 2001,2002 by Gilbert Baumann
  
  ;;; This library is free software; you can redistribute it and/or
  ;;; modify it under the terms of the GNU Library General Public
  