code: def __len__(self):
      return len(self.data_source)
  
imports: import torch
  import pandas
  from tqdm import tqdm
  import torch.nn.functional
  import torch.nn
  from autogluon.multimodal import MultiModalPredictor
  from datasets import list_datasets, load_dataset
  from setfit import sample_dataset
  from imagedatasets import build_dataset
  from torch.utils.data import Dataset
label_desc: Use image node_id 2 for calling the Wrapper obj's underlying member method code with example usage: obj.__len__() and returns: len