code: def __exit__(self, *_: Any) -> None:
      self.kill_master()
      return
  
imports: import os
  import subprocess
  import time
  from shlex import split
  from typing import Any, Iterator
  import pytest
  from tests import config
  from .abstract_cluster import Cluster
  from .utils import now_ts
label_desc: Use image node_id 3 for calling the ManagedSlurmCluster obj's underlying member method code with example usage: obj.__exit__() without return types