# File lib/net/dns/header.rb, line 383
      def qr=(val)
        case val
        when true
          @qr = 1
        when false
          @qr = 0
        when 0,1
          @qr = val
        else
          raise ArgumentError, ":qr must be true(or 1) or false(or 0)"
        end
      end