old_contents: """
  Pseudo-package for all of the core symbols from the image object and its reference
  system.  Use this module for importing core names into your namespace. For example:
   from neuorimaging.core.api import Image
  """
  
  # Note: The order of imports is important here.
  from neuroimaging.core.image.base_image import BaseImage
  from neuroimaging.core.reference.grid import SamplingGrid
  
  
  
  from neuroimaging.core.image.iterators import SliceIterator, \
       SliceParcelIterator, ParcelIterator, fMRIParcelIterator, \
       fMRISliceParcelIterator, ImageSequenceIterator
  from neuroimaging.core.reference.mapping import Mapping, Affine
  from neuroimaging.core.reference.coordinate_system import CoordinateSystem, \
       DiagonalCoordinateSystem
  from neuroimaging.core.reference.axis import VoxelAxis, space, spacetime
  
  from neuroimaging.core.image.image import Image
  
new_contents: """
  Pseudo-package for all of the core symbols from the image object and its reference
  system.  Use this module for importing core names into your namespace. For example:
   from neuorimaging.core.api import Image
  """
  
  # Note: The order of imports is important here.
  from neuroimaging.core.image.base_image import BaseImage
  from neuroimaging.core.reference.grid import SamplingGrid
  
  
  
  from neuroimaging.core.image.iterators import SliceIterator, \
       SliceParcelIterator, ParcelIterator, fMRIParcelIterator, \
       fMRISliceParcelIterator, ImageSequenceIterator
  from neuroimaging.core.reference.mapping import Mapping, Affine
  from neuroimaging.core.reference.coordinate_system import CoordinateSystem, \
       DiagonalCoordinateSystem
  from neuroimaging.core.reference.axis import VoxelAxis, space, spacetime
  
  from neuroimaging.core.image.image import Image, merge_images
  
subject: add merge_images to core.api