anchor.diff:  (defclass feed ()
     ((author :initarg :author :initform nil :reader feed-author)
      (url :initarg :url :reader feed-url)
  -   (category :initarg :category :initform nil :reader feed-category)))
  +   (category :initarg :category :initform nil :accessor feed-category)))
   
   (defgeneric find-feed-entities (feed rawfeed))
   (defgeneric parse-feed-entry (feed rawentry))
  
positive.code: (defparameter *planet.reader.package*
    (defpackage :planet.reader
      (:use)
      (:import-from :planet :define-feed :define-planet)))
  
  (defun load-feeds-from-file (path)
    (let ((*feeds* nil)
  
negative.code:            :feed
             :feed-author
             :feed-url
             :feed-category
             :*feeds-ns-map*
             ))
  
  