# File lib/feedzirra/feed.rb, line 58
    def self.add_common_feed_entry_element(element_tag, options = {})
      # need to think of a better way to do this. will break for people who want this behavior
      # across their added classes
      feed_classes.map{|k| eval("#{k}Entry") }.each do |klass|
        klass.send(:element, element_tag, options)
      end
    end