code: def stop(self):
      self.stopped = True
  
file_path: ray/python/ray/experimental/job/example_job/demo_script.py
imports: import argparse
  import time
  import ray
  import ray.experimental.internal_kv
label_desc: Use image node_id 4 for calling the StepActor obj's underlying member method code with example usage: obj.stop() without return types