code: def img_4d_long_mni(rng, shape_4d_long, affine_mni):
      """Return a default random filled long 4D Nifti1Image."""
      return Nifti1Image(
          rng.uniform(size=shape_4d_long), affine=affine_mni
      )
  
imports: import warnings
  import nibabel
  import numpy
  import pytest
  from nibabel import Nifti1Image
  from nilearn import image
  from nilearn.datasets.tests._testing import request_mocker
  from nilearn.datasets.tests._testing import temp_nilearn_data_dir
  from nilearn.experimental.surface.tests.conftest import make_mini_img, mini_img, mini_mesh
label_desc: Use image node_id 34 for calling a global function with example usage: img_4d_long_mni(rng, shape_4d_long, affine_mni) and returns: Nifti1Image