code: def test_send_ipc_message():
      with IPCServer.run_in_background(lambda x: x) as server:
          assert send_ipc_message(current_process, 6) == 6
      with pytest.raises(IOError):
          send_ipc_message(current_process, 7)
  
imports: import contextlib
  import pickle
  import random
  import socket
  import sys
  import threading
  import time
  import psutil
  import pytest
  import retrying
  from fiftyone.service.ipc import IPCServer, send_request
  from fiftyone.service.util import find_processes_by_args, get_listening_tcp_ports, normalize_wrapper_process, send_ipc_message
label_desc: Use image node_id 14 for calling a global function with example usage: test_send_ipc_message() without return types