# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2017-01-04 16:05:48 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/816677014576844800) In reply to: [@pilky](http://twitter.com/pilky/status/816676190689886209) @pilky @lukeredpath ... switching to a protocol ensure the class only sees the functionality it needs.