adv_attr_accessor

# File actionmailer/lib/action_mailer/adv_attr_accessor.rb, line 3
    def adv_attr_accessor(*names)
      names.each do |name|
        ivar = "@#{name}"

        class_eval "def \#{name}=(value)\n\#{ivar} = value\nend\n\ndef \#{name}(*args)\nraise ArgumentError, \"expected 0 or 1 parameters\" unless args.length <= 1\nif args.empty?\n\#{ivar} if instance_variable_names.include?(\#{ivar.inspect})\nelse\n\#{ivar} = args.first\nend\nend\n", __FILE__, __LINE__ + 1

        self.protected_instance_variables << ivar if self.respond_to?(:protected_instance_variables)
      end
    end