code: def test_is_stable() -> None:
      assert Test().is_stable()
      assert Test(stable=True).is_stable()
      assert not Test(stable=False).is_stable()
  
imports: import json
  import sys
  import os
  import platform
  from unittest import mock
  import boto3
  import pytest
  from unittest.mock import patch
  from ray_release.bazel import bazel_runfile
  from ray_release.configs.global_config import init_global_config, get_global_config
  from ray_release.test import Test, TestResult, TestState, _convert_env_list_to_dict, DATAPLANE_ECR_REPO, DATAPLANE_ECR_ML_REPO
label_desc: Use image node_id 8 for calling a global function with example usage: test_is_stable() without return types