alias_attribute_with_dirty (ActiveRecord::Dirty::ClassMethods)

    # File lib/active_record/dirty.rb, line 173
          def alias_attribute_with_dirty(new_name, old_name)
            alias_attribute_without_dirty(new_name, old_name)
            DIRTY_SUFFIXES.each do |suffix|
              module_eval "def \#{new_name}\#{suffix}; self.\#{old_name}\#{suffix}; end  # def subject_changed?; self.title_changed?; end\n", __FILE__, __LINE__+1
            end
          end