code: def test_secede_rejoin_quiet():
      with ThreadPoolExecutor(2) as e:
  
          def f():
              assert threading.current_thread() in e._threads
              secede()
              sleep(0.1)
              assert threading.current_thread() not in e._threads
              rejoin()
              assert len(e._threads) == 2
              assert threading.current_thread() in e._threads
              return threading.current_thread()
  
          future = e.submit(f)
          result = future.result()
  
file_path: distributed/distributed/tests/test_threadpoolexecutor.py
imports: from __future__ import annotations
  import threading
  from time import sleep
  from distributed.metrics import time
  from distributed.threadpoolexecutor import ThreadPoolExecutor, rejoin, secede
label_desc: Use image node_id 6 for calling a global function with example usage: test_secede_rejoin_quiet() and returns: threading