Yep...one can imagine a naive implementation that yields the `Example` object to the inner-most around hook, and then wraps that and yields the wrapper to the outer-most around hook.  This spec is trying to show that the full example interface is available off the yielded arg for all around hooks.  `data_1` and `data_2` are just short hands for "data off of arg yielded to hook 1" and "data off arg yielded to hook 2".