old_contents: from .mockrequests import get, post, Request, save
  
  __all__ = ['get', 'post', 'Request', 'save']
  
new_contents: from .mockrequests import get, post, Request, save, Session
  
  __all__ = ['get', 'post', 'Request', 'save', 'Session']
  
subject: Update __init__.py