code: def modify_context(
      self,
      uris: List[str],
      plugin_config_dict: dict,
      ctx: RuntimeEnvContext,
      logger: logging.Logger,
  ) -> None:
      global my_plugin_setup_times
      ctx.env_vars[MyPluginForHang.env_key] = str(my_plugin_setup_times)
  
imports: import asyncio
  import logging
  import os
  from pathlib import Path
  import time
  from unittest import mock
  import tempfile
  import json
  from typing import List
  import pytest
  import ray
  from ray._private.runtime_env.context import RuntimeEnvContext
  from ray._private.runtime_env.plugin import RuntimeEnvPlugin
  from ray._private.test_utils import enable_external_redis, wait_for_condition
  from ray.exceptions import RuntimeEnvSetupError
  from ray.runtime_env.runtime_env import RuntimeEnv
label_desc: Use image node_id 2 for calling the MyPluginForHang obj's underlying member method code with example usage: obj.modify_context(uris, plugin_config_dict, ctx, logger) without return types