emberjs/ember.js — pull request #4752 by davidgovea (2014-04-22 01:37:05+00:00)
Title: [DOC] Add docs for ArrayProxy content observer methods

Came across these hooks while reading [this article on live collections](http://joefiorini.com/posts/user-friendly-live-collections-in-emberjs).

Seems like they're only there to be overridden, so lets document this magic!

Let me know if I'm mistaken, or if these are not recommended hooks to use.