# File lib/paper_trail/has_paper_trail.rb, line 132
      def paper_trail_on_update
        before_save  :reset_timestamp_attrs_for_update_if_needed!,
                     :on => :update
        after_update :record_update,
                     :if => :save_version?
        after_update :clear_version_instance!

        return if paper_trail_options[:on].include?(:update)
        paper_trail_options[:on] << :update
      end