code: def test_wait_multi_thread(self) -> None:
      def slow_set_future(fut, value):
          time.sleep(0.5)
          fut.set_result(value)
  
      f = Future[torch.Tensor]()
  
      t = threading.Thread(
          target=slow_set_future, args=(f, torch.ones(2, 2))
      )
      t.start()
  
      self.assertEqual(f.wait(), torch.ones(2, 2))
      t.join()
  
imports: import threading
  import time
  import torch
  import unittest
  from torch.futures import Future
  from torch.testing._internal.common_utils import IS_WINDOWS, TestCase, TemporaryFileName, run_tests
  from typing import TypeVar
label_desc: Use image node_id 6 for calling the TestFuture obj's underlying member method code with example usage: obj.test_wait_multi_thread() without return types