code: def img1(affine_eye):
      data = np.ones((2, 2, 2, 2))
      return Nifti1Image(data, affine=affine_eye)
  
file_path: nilearn/nilearn/_utils/tests/test_niimg.py
imports: from pathlib import Path
  import joblib
  import nibabel
  import numpy
  import pytest
  from nibabel import Nifti1Header, Nifti1Image
  from nilearn._utils import load_niimg, niimg, testing
  from nilearn.image import get_data, new_img_like
label_desc: Use image node_id 1 for calling a global function with example usage: img1(affine_eye) and returns: Nifti1Image