Hmmm...I wonder if we're limiting users by sticking to these Underscore collection methods. Models, for instance, use some [other methods entirely.](https://github.com/jashkenas/backbone/blob/master/backbone.js#L601) Do we think there would be use in making a more general mixin?

If we decided that was the case we could add a third argument to this method which is an array of the ones you want to pull out. This way all of the Underscore methods are available to you for mixing in.

Separately we could pull out this list of methods so that it's available for folks to pass in, or maybe use it as a default.

Just some thoughts :thought_balloon: