code: def _identity(x):
      return x
  
imports: from __future__ import annotations
  import warnings
  from collections.abc import Callable
  from copy import deepcopy
  from typing import TYPE_CHECKING, Any
  import numpy
  import torch
  from monai.config.type_definitions import NdarrayOrTensor
  from monai.data.dataloader import DataLoader
  from monai.data.dataset import Dataset
  from monai.data.utils import decollate_batch, pad_list_data_collate
  from monai.transforms.compose import Compose
  from monai.transforms.croppad.batch import PadListDataCollate
  from monai.transforms.inverse import InvertibleTransform
  from monai.transforms.post.dictionary import Invertd
  from monai.transforms.transform import Randomizable
  from monai.transforms.utils_pytorch_numpy_unification import mode, stack
  from monai.utils import CommonKeys, PostFix, optional_import
label_desc: Use image node_id 1 for calling a global function with example usage: _identity(x) and returns: x