# File lib/whois/record/parser.rb, line 217
      def unchanged?(other)
        unless other.is_a?(self.class)
          raise(ArgumentError, "Can't compare `#{self.class}' with `#{other.class}'")
        end

        equal?(other) ||
        parsers.size == other.parsers.size && all_in_parallel?(parsers, other.parsers) { |one, two| one.unchanged?(two) }
      end