old_contents: from .imshows import cshow, rshow, nshow
  
  __all__ = ['cshow', 'rshow', 'nshow']
  
  
new_contents: from .imshows import cshow, rshow, nshow
  
  __all__ = ['cshow', 'rshow', 'nshow', 'sshow']
  
  
subject: Include import of sshow in __init__