code: def _fork_callback_before():
      if not PatchOsFork._current_task:
          return
      from ..task import Task
  
      # ensure deferred is done, but never try to generate a Task object
      # noinspection PyProtectedMember
      task = Task._Task__main_task
      # this will force the deferred init call to finish
      # noinspection PyProtectedMember
      Task._wait_for_deferred(task)
  
imports: import os
  from functools import partial
  from time import sleep
  from multiprocessing import pool
  import six
  from ..config import TASK_LOG_ENVIRONMENT, running_remotely, config
  from ..utilities.process.mp import BackgroundMonitor
label_desc: Use image node_id 4 for calling the PatchOsFork obj's underlying member method code with example usage: obj._fork_callback_before() without return types