code: def __getitem__(self, index):
      dummy_im = torch.zeros(3, self.output_size, self.output_size)
      dummy_im = rearrange(dummy_im * 2.0 - 1.0, "c h w -> h w c")
      return {
          self.image_key: dummy_im,
          self.caption_key: self.captions[index],
      }
  
imports: import json
  from pathlib import Path
  from typing import Dict
  import torch
  from datasets import load_dataset
  from einops import rearrange
  from ldm.util import instantiate_from_config
  from omegaconf import DictConfig, ListConfig
  from PIL import Image
  from torch.utils.data import Dataset
  from torchvision import transforms
label_desc: Use image node_id 3 for calling the TextOnly obj's underlying member method code with example usage: obj.__getitem__(index) and returns: dict