anchor.diff:    (:import-from #:mcclim-render-internals
                   #:render-medium-mixin
                   #:make-path
  -                #:line-to
                   #:curve-to
                   #:%medium-fill-paths
  -                #:%medium-stroke-paths
  -                #:with-transformed-position)
  +                #:%medium-stroke-paths)
   
     (:import-from #:clim-postscript
                   #:postscript-medium
  
positive.code: 
  (defpackage :mcclim-bezier
    (:use #:clim #:clim-lisp)
  
    (:import-from #:clim-null
                  #:null-medium)
  
negative.code: 
             #:polygonalize
             #:polygon-points
  
             #:transformation
             #:areas
             #:positive-areas
  