code: def __exit__(self, *_):
      # Terminating the child threads
      for _ in range(self.num_workers):
          self.queries.put(None)
  
file_path: ffcv/ffcv/memory_managers/process_cache/schedule.py
imports: from collections import defaultdict
  from dataclasses import dataclass
  from typing import Mapping
  from queue import Queue
  import numpy
  from .page_reader import PageReader
label_desc: Use image node_id 3 for calling the ScheduleExecutor obj's underlying member method code with example usage: obj.__exit__() without return types