code: def __next__(self):
      if not self.is_initialized:
          self.initialize()
          self.is_initialized = True
      try:
          while self._queue.empty():
              sleep(self.wait_time)
          item = self._queue.get(timeout=self.timeout)
      except KeyboardInterrupt:
          print(
              "MultiThreadedGenerator: caught exception: {}".format(
                  sys.exc_info()
              )
          )
          self._finish()
      except Exception as e:
          print("Exception: {}".format(e))
          self._finish()
      return item
  
file_path: PaddleSeg/contrib/MedicalSeg/nnunet/transforms/multi_threaded_augmenter.py
imports: import sys
  import paddle
  import traceback
  from multiprocessing import Event, Queue, Process
  from time import sleep
  from threadpoolctl import threadpool_limits
label_desc: Use image node_id 4 for calling the MultiThreadedAugmenter obj's underlying member method code with example usage: obj.__next__() and returns: item