# File lib/aws/glacier/vault.rb, line 110
      def notification_configuration= cfg
        if cfg
          opts = {}
          opts.merge!(resource_options)
          opts[:vault_notification_config] = {}
          opts[:vault_notification_config][:sns_topic] = cfg.sns_topic.arn
          opts[:vault_notification_config][:events] = cfg.events
          client.set_vault_notifications(opts)
        else
          client.delete_vault_notifications(resource_options)
        end
      end