code: def __iter__(self):
      self.iter = super(DataLoaderX, self).__iter__()
      self.iter = BackgroundGenerator(self.iter, self.local_rank)
      self.preload()
      return self
  
imports: import os
  import os.path
  import queue
  import mxnet
  import pickle
  import threading
  import logging
  import numpy
  import insightface
  from insightface.utils import face_align
  import torch
  from torch.utils.data import DataLoader, Dataset
  from torchvision import transforms
  import cv2
  import albumentations
  from albumentations.pytorch import ToTensorV2
  from .augs import RectangleBorderAugmentation
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