code: def _exit(self) -> None:
      # extracted for mocking
      self._logger.info("Exiting gracefully after preemption/timeout.")
      sys.exit(-1)
  
imports: import os
  import signal
  import socket
  import sys
  import time
  import types
  import typing
  from pathlib import Path
  from .None import logger, utils
  from .utils import DelayedSubmission, JobPaths
label_desc: Use image node_id 6 for calling the SignalHandler obj's underlying member method code with example usage: obj._exit() without return types