* 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:
Batman's son Robin must prove to his father-as well as his previous mantle-holders-that he's worthy of being the newest Boy Wonder.
Damian Wayne, a.k.a. Robin, must prove to Batman, as well as the previous Boy Wonders that he's every bit the hero that his father is in the wake of the cataclysmic events of the best-selling BATMAN & ROBIN VOLUME 1: BORN TO KILL. Collects Batman & Robin #0, 9-14