code: def __len__(self) -> int:
      return len(self.files)
  
file_path: fairseq/examples/data2vec/data/path_dataset.py
imports: import glob
  import os
  from typing import List, Optional, Tuple
  import logging
  import numpy
  import torchvision.transforms.functional
  import PIL
  from PIL import Image
  from torchvision.datasets import VisionDataset
label_desc: Use image node_id 2 for calling the PathDataset obj's underlying member method code with example usage: obj.__len__() and returns: len