code: def test_deliver_released_slot():
      mailbox, handle, result = get_test_setup()
      result.control.mailbox_slot = handle.address
      mailbox.deliver(result)
      got_result = handle.wait(timeout=-1)
      assert got_result.run_result.run.run_id == "this_is_me"
  
      # mail slot has been released, lets redeliver to nowhere
      result2 = pb.Result()
      result2.CopyFrom(result)
      result2.run_result.run.run_id = "this_is_new"
      mailbox.deliver(result2)
  
      # our handler should timeout
      got_result = handle.wait(timeout=1)
      assert got_result is None
  
imports: import sys
  import threading
  import time
  from contextlib import contextmanager
  from unittest import TestCase
  from unittest.mock import Mock, patch
  from parameterized import parameterized
  from wandb.proto import wandb_internal_pb2
  from wandb.sdk.lib.mailbox import Mailbox, MailboxProbe, MailboxProgress
label_desc: Use image node_id 4 for calling a global function with example usage: test_deliver_released_slot() without return types