Clientside extensions

I was hoping these PropertyProviders had made it in, per this post on the topic: Announcement: Bitbucket Server 7.0 Early Access Program (EAP) release - #16 by rlander

It doesn’t appear they have. Is there any suggestion on how to pull in data like this, without making tons of more requests or duplicating the activities request?

I can cache things, but then I need to hit the activities endpoint and page through it, or just produce them myself in an unpaged or paged endpoint. Before, I could simply get them from the client context.