class_docstr: POSIX Timeout version: To be used in a ``with`` block and timeout its content.
code: def __exit__(self, type_, value, traceback):
      try:
          signal.setitimer(signal.ITIMER_REAL, 0)
      except ValueError:
          self.log.warning(
              "timeout can't be used in the current context",
              exc_info=True,
          )
  
imports: from __future__ import annotations
  import os
  import signal
  from threading import Timer
  from typing import ContextManager
  from airflow.exceptions import AirflowTaskTimeout
  from airflow.utils.log.logging_mixin import LoggingMixin
  from airflow.utils.platform import IS_WINDOWS
label_desc: Use image node_id 4 for calling the TimeoutPosix obj's underlying member method code with example usage: obj.__exit__(type_, value, traceback) without return types