code: def set_epoch(self, epoch: int):
      # TODO : Currently sets the same seed every epoch, set this from MultiDataLoader
      logger.info(f"set epoch to {epoch} in airstore dataset")
      self.epoch = epoch
  
file_path: mmf/mmf/datasets/builders/airstore/dataset.py
imports: import logging
  from io import BytesIO
  from typing import Any, Iterable
  import torch
  from iopath.common.file_io import PathManager
  from mmf.common.sample import Sample
  from mmf.datasets.base_dataset import BaseDataset
  from mmf.utils.general import get_batch_size
  from PIL import Image, ImageFile
label_desc: Use image node_id 2 for calling the AirstoreDataset obj's underlying member method code with example usage: obj.set_epoch(epoch) without return types