* Client-Side Metrics Include
* Wiki: https://tiny.amazon.com/cpso0wg6
* Needs to be included at the top of pages because it tracks latency--
* ue_t0 needs to be as close to body load as possible.
* - ue.tag maps to URLType dimension of OnlineQueryLog in PMET. Because we cannot add
* custome data to other dimensions in PMET through CSM, we are replicating it thrice to
* cover each store, page type, and the intersections of the two.
* - Whitelists are listed in the usage guide:
The story of Billy Butcher, the Boys' mysterious leader, is told at last. From the backstreets of London's East End to the carnage of the Falklands War, from the heights of love to the depths of tragedy, the most violent man in comics reveals the terrible nature of the forces that drive him. And when he's done, he'll be ready... to finish things once and for all. MATURE THEMES