code: def __iter__(self):
      self.iter = super(DataLoaderX, self).__iter__()
      self.iter = BackgroundGenerator(self.iter, self.local_rank)
      self.preload()
      return self
  
imports: import numbers
  import os
  import queue
  import threading
  import mxnet
  import numpy
  import torch
  from torch.utils.data import DataLoader, Dataset
  from torchvision import transforms
  import cv2
  import albumentations
  from albumentations.pytorch import ToTensorV2
  from insightface.app import MaskAugmentation
label_desc: Use image node_id 2 for calling the DataLoaderX obj's underlying member method code with example usage: obj.__iter__() and returns: self