[]=

# File actionpack/lib/action_dispatch/middleware/cookies.rb, line 295
      def []=(key, options)
        if options.is_a?(Hash)
          options.symbolize_keys!
          options[:value] = @verifier.generate(options[:value])
        else
          options = { :value => @verifier.generate(options) }
        end

        raise CookieOverflow if options[:value].size > MAX_COOKIE_SIZE
        @parent_jar[key] = options
      end