CapillarySoftware/Presentable — pull request #4 by garyb (2014-07-26 17:00:18+00:00)
Title: Add subscribeEventedEffOn

So there's probably a slightly more elegant way of defining this so you don't have to duplicate the entire of `subscribeEventedOnPrime` for `subscribeEventedEffOnPrime`, but as you can see the changes are fairly minor.