old_contents: from nighres.segmentation.conditional_shape import conditional_shape
  from nighres.segmentation.conditional_shape import conditional_shape_atlasing
  from nighres.segmentation.fuzzy_cmeans import fuzzy_cmeans
  
new_contents: from nighres.segmentation.conditional_shape import conditional_shape
  from nighres.segmentation.conditional_shape import conditional_shape_atlasing
  from nighres.segmentation.conditional_shape import conditional_shape_updating
  from nighres.segmentation.fuzzy_cmeans import fuzzy_cmeans
  
subject: add function