anchor.diff:          :cps-wrappers             (copy-hash-table cps-wrappers)
           :native-cps-functions     (copy-hash-table native-cps-functions)
           :postprocessor            postprocessor
  +        :configurations           (copy-alist configurations)
           :make-text?               make-text?
           :encapsulate-strings?     encapsulate-strings?
           :dump-passes?             dump-passes?
  
positive.code: (defun transpiler-add-used-function (tr x)
    (= (href (transpiler-used-functions tr) x) t)
    x)
  
negative.code:   (predefined-symbols       nil)
  
    (postprocessor            #'concat-stringtree)
  
    (configurations           nil)
  
    ;;;
    ;;; You mustn't init these.
  