anchor.diff:    (:export-accessor-names-p t)          ; TODO: Unexport?
     (:accessor-name-transformer (class*:make-name-transformer name)))
   
  -(defclass renderer-window (gtk-window)
  -  ()
  -  (:metaclass mixin-class))
  +(handler-bind ((warning #'muffle-warning))
  +  (defclass renderer-window (gtk-window)
  +    ()
  +    (:metaclass mixin-class)))
   
   (define-class gtk-buffer ()
     ((gtk-object)
  
positive.code:   (:export-accessor-names-p t)
    (:accessor-name-transformer (class*:make-name-transformer name)))
  
  (defclass renderer-buffer (gtk-buffer)
    ()
    (:metaclass mixin-class))
  
  (defclass webkit-web-context (webkit:webkit-web-context) ()
    (:metaclass gobject:gobject-class))
  
negative.code:   (:accessor-name-transformer (class*:make-name-transformer name))
    (:metaclass user-class))
  
  (handler-bind ((warning #'muffle-warning))
    (defclass renderer-browser (gtk-browser)
      ()
      (:metaclass mixin-class)))
  
  (alex:define-constant +internal+ "internal" :test 'equal)
  (alex:define-constant +default+ "default" :test 'equal)
  