# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2017-01-04 00:23:04 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/816439769781575680) RT @NatashaTheRobot: Weak References and Type Erasure via @curtclifton #swiftlang #iosdev https://t.co/Nguiu78Lfm