New candidate JEP: 481: Scoped Values (Third Preview)

[Mark Reinhold]

https://openjdk.org/jeps/481

  Summary: Introduce scoped values, which enable a method to share
  immutable data both with its callees within a thread, and with child
  threads. Scoped values are easier to reason about than thread-local
  variables. They also have lower space and time costs, especially
  when used together with virtual threads (JEPÂ 444) and structured
  concurrency (JEPÂ 480). This is a preview API.

- Mark