code: def transfer_batch_to_device(
      self, batch: Any, device: torch.device, dataloader_idx: int
  ) -> Any:
      return self.datamodule.transfer_batch_to_device(
          batch, device, dataloader_idx
      )
  
file_path: opacus/opacus/lightning.py
imports: from typing import Any, Optional
  import pytorch_lightning
  import torch
  from opacus.data_loader import DPDataLoader
label_desc: Use image node_id 8 for calling the DPLightningDataModule obj's underlying member method code with example usage: obj.transfer_batch_to_device(batch, device, dataloader_idx) and returns: self