code: def ping(self):
      # Exit process with some probability.
      exit_chance = np.random.rand()
      if exit_chance > self.death_probability:
          sys.exit(-1)
  
file_path: ray/release/nightly_tests/stress_tests/test_dead_actors.py
imports: import argparse
  import json
  import logging
  import numpy
  import os
  import sys
  import time
  import ray
label_desc: Use image node_id 2 for calling the Child obj's underlying member method code with example usage: obj.ping() without return types