* 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:
Red Robin, Wonder Girl, Raven, Bunker, and Beast Boy step out of the shadows of the adult heroes of the DC Universe and into the limelight in this series taking the teenaged heroes of DC Comics—The New 52 in an all-new, very different direction.