code: def __len__(self):
      return len(self.dset)
  
file_path: generative-models/sgm/data/cifar10.py
imports: import pytorch_lightning
  import torchvision
  from torch.utils.data import DataLoader, Dataset
  from torchvision import transforms
label_desc: Use image node_id 3 for calling the CIFAR10DataDictWrapper obj's underlying member method code with example usage: obj.__len__() and returns: len