code: def clear_history(self):
      with self.lock:
          self.calls = []
  
imports: import re
  import threading
  from subprocess import CalledProcessError
  from typing import Callable, Dict, List, Optional
  from ray.autoscaler.node_provider import NodeProvider
label_desc: Use image node_id 6 for calling the MockProcessRunner obj's underlying member method code with example usage: obj.clear_history() without return types