# File lib/guard/notifier.rb, line 33
      def turn_on
        ENV["GUARD_NOTIFY"] = 'true'
        case RbConfig::CONFIG['target_os']
        when /darwin/i
          require_growl
        when /linux/i
          require_libnotify
        when /mswin|mingw/i
          require_rbnotifu
        end
      end