write

# File actionpack/lib/action_dispatch/middleware/cookies.rb, line 231
      def write(headers)
        @set_cookies.each { |k, v| ::Rack::Utils.set_cookie_header!(headers, k, v) if write_cookie?(v) }
        @delete_cookies.each { |k, v| ::Rack::Utils.delete_cookie_header!(headers, k, v) }
      end