# File lib/aws/record/validator.rb, line 121
      def reject_unknown_options
        invalid_keys = options.keys - self.class::ACCEPTED_OPTIONS
        if invalid_keys.length == 1
          raise ArgumentError, "unknown option :#{invalid_keys.first}"
        elsif invalid_keys.length > 1
          bad = invalid_keys.collect{|k| ":#{k}" }.join(', ')
          raise ArgumentError, "unknown options #{bad}"
        end
      end