code: def test_to_make_ensure_runtime_env_api(start_cluster):
      # make sure RuntimeEnv can be used in an be used interchangeably with
      # an unstructured dictionary in the relevant API calls.
      ENV_KEY = "TEST_RUNTIME_ENV"
  
      @ray.remote(runtime_env=RuntimeEnv(env_vars={ENV_KEY: "f1"}))
      def f1():
          assert os.environ.get(ENV_KEY) == "f1"
  
      ray.get(f1.remote())
  
      @ray.remote
      def f2():
          assert os.environ.get(ENV_KEY) == "f2"
  
      ray.get(
          f2.options(
              runtime_env=RuntimeEnv(env_vars={ENV_KEY: "f2"})
          ).remote()
      )
  
      @ray.remote(runtime_env=RuntimeEnv(env_vars={ENV_KEY: "a1"}))
      class A1:
          def f(self):
              assert os.environ.get(ENV_KEY) == "a1"
  
      a1 = A1.remote()
      ray.get(a1.f.remote())
  
      @ray.remote
      class A2:
          def f(self):
              assert os.environ.get(ENV_KEY) == "a2"
  
      a2 = A2.options(
          runtime_env=RuntimeEnv(env_vars={ENV_KEY: "a2"})
      ).remote()
      ray.get(a2.f.remote())
  
imports: from dataclasses import dataclass
  import dataclasses
  import json
  import logging
  import os
  import subprocess
  import sys
  import tempfile
  import time
  from pathlib import Path
  from typing import Any, Dict, List
  from unittest import mock
  import pytest
  from ray.runtime_env.runtime_env import RuntimeEnvConfig, _merge_runtime_env
  import requests
  import ray
  from ray._private.runtime_env.context import RuntimeEnvContext
  from ray._private.runtime_env.plugin import RuntimeEnvPlugin
  from ray._private.runtime_env.uri_cache import URICache
  from ray._private.runtime_env.utils import SubprocessCalledProcessError, check_output_cmd
  from ray._private.test_utils import chdir, get_error_message, get_log_sources, wait_for_condition
  from ray._private.utils import get_master_wheel_url, get_release_wheel_url, get_wheel_filename
  from ray.exceptions import RuntimeEnvSetupError
  from ray.runtime_env import RuntimeEnv
  import ray._private.ray_constants
label_desc: Use image node_id 19 for calling a global function with example usage: test_to_make_ensure_runtime_env_api(start_cluster) without return types