It would be helpful when debugging issues relating to HTTP state if developers could easily determine whether or not a given origin fell into a registrable domain that's considered "prevalent", on the one hand, and which bucket of interaction age it falls into, on the other. Likewise, it would be great if there was a mechanism for developers to control this status to set up test cases locally. It would be much simpler to run through test cases if we could directly edit an origin's state via the inspector, rather than trying to trick the system into considering a test origin as "prevalent" and then setting the system clock forward to trick the system into bucketing its interaction age accordingly. :) Thanks!
<rdar://problem/33136345>
Exposing this information to developers makes a lot of sense. I'm just now learning how complicated this is. Partitioned storage is currently subtlety different across Storages and Cookies, and dynamic for some but not others.