* 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:
"Emperor Joker" part 4, continued from ADVENTURES OF SUPERMAN #583. As one world ends, another begins as the Emperor Joker rules now with an Empress by his side! And how can Superman and friends save the day when they've all be transformed into Super-Pets? Continued in ACTION COMICS #770.