What is `/var/metrics` used for?

As the title says. It doesn't seem to be part of FHS, and I could not find much in google. I'm wondering which applications write there, on which occasions, and for what purposes.

edit: In response to the comments: I am seeing it on a fresh install of Kubutnu 20.04, while inspecting it from another Linux. I haven't booted it yet. It is listed as drwxrwsrwt 2 root avahi-autoipd and is empty at the moment.

I'll run the diagnostics when I boot it, and will update.

Update:

• From inside the system, it's listed as drwxrwsrwt 2 root whoopsie.
• sudo dpkg -S /var/metrics doesn't find anything.
• sudo lsof +D /var/metrics returns empty.
• sudo find /var/metrics -print0 | xargs -0 --no-run-if-empty file returns /var/metrics: setgid, sticky, directory and nothing else. The folder is empty.

Doesn't look like it's being used yet on my system. It's just there.

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