You did understand it perfectly. I was naive to think this would be something new or local to java agents, and didn't think better to look for it in the apm repo or in the other agents.
There's even an issue for the java one specifically: https://github.com/elastic/apm-agent-java/issues/507
I'll make sure to follow them closely, and I'm looking forward to them being available!
Thanks for your time, @axw.