code: def stop(self, wait=False, timeout=0):
      self._cluster.stop(wait=wait, timeout=timeout)
  
imports: import logging
  import time
  import warnings
  import requests
  from ...session import new_session
  from .config import MarsSchedulerSpecConfig, MarsWorkerSpecConfig, MarsWebSpecConfig, MarsJobConfig
label_desc: Use image node_id 6 for calling the KubeDLClusterClient obj's underlying member method code with example usage: obj.stop(wait, timeout) without return types