deserialize

# File actionpack/lib/action_dispatch/middleware/cookies.rb, line 530
        def deserialize(name)
          rotate = false
          value  = yield -> { rotate = true }

          if value
            case
            when needs_migration?(value)
              Marshal.load(value).tap do |v|
                self[name] = { value: v }
              end
            when rotate
              serializer.load(value).tap do |v|
                self[name] = { value: v }
              end
            else
              serializer.load(value)
            end
          end
        end