code: def images(spatial_image: SpatialImage) -> Iterable[SpatialImage]:
      images = [spatial_image]
      image_data = spatial_image.get_fdata().copy()
      image_data[1, 1, 1, 0] = 2
      images.append(Nifti1Pair(image_data, np.eye(4)))
      return images
  
imports: from typing import Iterable, Sequence
  import numpy
  import pytest
  from nibabel.nifti1 import Nifti1Pair
  from nibabel.spatialimages import SpatialImage
  from brainiak.image import mask_image, mask_images, MaskedMultiSubjectData, multimask_images, SingleConditionSpec
label_desc: Use image node_id 6 for calling a global function with example usage: images(spatial_image) and returns: images