code: def __getitem__(self, idx):
      return self.samples[idx]
  
imports: import argparse
  import os
  import unittest
  from copy import deepcopy
  import torch
  from mmf.common.registry import registry
  from mmf.models.base_model import BaseModel
  from mmf.trainers.callbacks.lr_scheduler import LRSchedulerCallback
  from mmf.utils.configuration import load_yaml
  from omegaconf import OmegaConf
label_desc: Use image node_id 2 for calling the NumbersDataset obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: self