code: def __call__(self, env: CallbackEnv):
      if env.iteration == self._iteration:
          rank = 0 if self.is_rank_0 else 1
          if rank in self._ranks:
              if not ray.get(self._state.has_failed.remote(self._id)):
                  success = ray.get(
                      self._state.set_failed.remote(self._id)
                  )
                  if not success:
                      # Another rank is already about to fail
                      return
  
                  pid = os.getpid()
                  print(f"Killing process: {pid} for actor rank {rank}")
                  time.sleep(1)
                  os.kill(pid, 9)
  
file_path: ray/release/lightgbm_tests/workloads/release_test_util.py
imports: import glob
  import os
  import time
  import ray
  from lightgbm_ray import train, RayDMatrix, RayFileType, RayParams, RayDeviceQuantileDMatrix
  from lightgbm_ray.tune import _TuneLGBMRank0Mixin
  from lightgbm.callback import CallbackEnv
label_desc: Use image node_id 2 for calling the FailureInjection obj's underlying member method code with example usage: obj.__call__(env) without return types