* 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:
For years, Superman believed himself to be the sole survivor of the doom planet Krypton. He grew up on Earth convinced he was the last of his kind. He was wrong. Superman, Supergirl, and the half-Kryptonian, half-human clone Superboy must now face their biggest threat: H'El on Earth.