code: def cookie_jar
        return @cookie_jar if defined?(@cookie_jar) && @cookie_jar
  
        jar = @request.cookie_jar.dup
        headers.fetch(:set_cookie, []).each do |cookie|
          jar.parse(cookie, @request.uri)
        end
  
        @cookie_jar = jar
      end
docs: Cookie jar extracted from response headers.
  
   @return [HTTP::CookieJar]