code: def __len__(self):
      return self.fake_len
  
file_path: NeMo/nemo/collections/multimodal/data/controlnet/controlnet_dataset.py
imports: import torch
  from nemo.collections.multimodal.data.common.webdataset import WebDatasetCommon
  from nemo.collections.multimodal.data.stable_diffusion.augmentation.augmentations import construct_image_augmentations, identical_transform
  from nemo.core.classes import Dataset
label_desc: Use image node_id 3 for calling the ControlNetSyntheticDataset obj's underlying member method code with example usage: obj.__len__() and returns: self