* 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 EXTREMISTS" part two! Believing heroes to be threats to the survival of any world, Lord Havok and the Extremists have already murdered the mightiest heroes from their home dimension. To save our Earth they'd kill thousands more, starting with the newly formed JLA. But eye-to-eye, are Havok's and Batman's goals that different? Billions of lives depend on the answer.