code: def slow_blocking_gen():
      """Slow synchronous client generator"""
      for i in range(INPUT_LEN):
          yield get_document(i, name="slow_blocking_gen")
          time.sleep(INPUT_GEN_SLEEP_TIME)
  
imports: import asyncio
  import os
  import time
  from datetime import datetime
  from functools import partial
  from multiprocessing import Process, current_process
  from typing import List
  import pytest
  from jina import Client, Document, DocumentArray, Executor, Flow, requests
label_desc: Use image node_id 4 for calling a global function with example usage: slow_blocking_gen() without return types