code: def __init__(self):
      self.session = aiohttp.ClientSession()
  
file_path: ray/python/ray/serve/_private/benchmarks/microbenchmark.py
imports: import asyncio
  import logging
  from pprint import pprint
  from typing import Dict, Union
  import aiohttp
  from starlette.requests import Request
  import ray
  from ray import serve
  from ray.serve._private.benchmarks.common import run_throughput_benchmark
  from ray.serve.handle import RayServeHandle
label_desc: Use image node_id 1 to create a new Client object  with example: obj = Client()