# File lib/aws/auto_scaling/notification_configuration.rb, line 48
      def notification_types= *notification_types

        client_opts = {}
        client_opts[:topic_arn] = topic_arn
        client_opts[:notification_types] = notification_types.flatten
        client_opts[:auto_scaling_group_name] = group.name

        group.client.put_notification_configuration(client_opts)

        @notification_types = notification_types.flatten

        nil

      end