code: def __aiter__(self):
      return self
  
file_path: ray/python/ray/serve/_private/proxy_response_generator.py
imports: import asyncio
  import logging
  import time
  from abc import ABC, abstractmethod
  from asyncio.tasks import FIRST_COMPLETED
  from typing import Any, Callable, Optional, Union
  from ray.serve._private.constants import SERVE_LOGGER_NAME
  from ray.serve._private.utils import calculate_remaining_timeout
  from ray.serve.handle import DeploymentResponse, DeploymentResponseGenerator
label_desc: Use image node_id 2 for calling the _ProxyResponseGeneratorBase obj's underlying member method code with example usage: obj.__aiter__() and returns: self