def close!(controller)
      self.each_with_rescue(@@klasses) {|klass| klass.close!(controller)}
      self.each_with_rescue(Footnotes.after_hooks) {|hook| hook.call(controller, self)}
    end
def close!(controller)
      self.each_with_rescue(@@klasses) {|klass| klass.close!(controller)}
      self.each_with_rescue(Footnotes.after_hooks) {|hook| hook.call(controller, self)}
    end
Calls the class method close! in each note
 Sometimes notes need to finish their work even after being read
 This method allows this kind of work