$ javac src/Timeouts.java && java Timeouts     (28-beta+21-ea)
-- inside the deadline
  [fast, fast]
-- deadline 200 ms, one subtask needs 5 s
  ExecutionException, cause = java.util.concurrent.StructuredTaskScope$CancelledByTimeoutException
  returned within well under a second (not 5 s): the slow subtask was interrupted
-- the same deadline with a joiner whose timeout() returns a partial result
  join() = [fast]
-- a thread factory decides the subtask thread's name
  [order-0, order-1]

$ javac src/CollectingJoiner.java && java CollectingJoiner     (28-beta+21-ea)
collected (sorted): [1, 3]
-- with a 100 ms timeout and a 5 s subtask
  CompletionException, cause = java.util.concurrent.StructuredTaskScope$CancelledByTimeoutException