# File lib/serverspec/type/service.rb, line 30
      def monitored_by?(monitor)
        check_method = "check_monitored_by_#{monitor}".to_sym
        unless monitor && commands.respond_to?(check_method)
          raise ArgumentError.new("`be_monitored_by` matcher doesn't support #{monitor}")
        end

        backend.send(check_method, @name)
      end