code: def test_local_gc_not_hang(shutdown_only, monkeypatch):
      """Verify the generator doesn't deadlock when a local GC is triggered."""
      with monkeypatch.context() as m:
          m.setenv("RAY_local_gc_interval_s", 1)
  
          ray.init()
  
          @ray.remote(_generator_backpressure_num_objects=1)
          def f():
              for _ in range(5):
                  yield 1
  
          gen = f.remote()
          time.sleep(5)
  
          # It should not hang.
          for ref in gen:
              ray.get(gen)
  
file_path: ray/python/ray/tests/test_streaming_generator_4.py
imports: import pytest
  import numpy
  import sys
  import time
  import gc
  import random
  import asyncio
  from typing import Optional
  from pydantic import BaseModel
  import ray
label_desc: Use image node_id 3 for calling a global function with example usage: test_local_gc_not_hang(shutdown_only, monkeypatch) without return types