code: def _no_op(x):
      return x
  
imports: from __future__ import annotations
  import os
  import shutil
  import tempfile
  import unittest
  from glob import glob
  import nibabel
  import numpy
  import torch
  import monai
  import monai.transforms
  from monai.data import create_test_image_3d, decollate_batch
  from monai.transforms.utils import has_status_keys
  from monai.utils import TraceStatusKeys, set_determinism
  from tests.utils import HAS_CUPY, DistTestCase, SkipIfBeforePyTorchVersion, skip_if_quick
label_desc: Use image node_id 1 for calling a global function with example usage: _no_op(x) and returns: x