old_contents: from .lib import SinonBase, SinonSpy, SinonStub, SinonMock, SinonSandbox
  
  init = SinonBase.init
  test = SinonSandbox.sinontest
  stub = SinonStub.SinonStub
  spy = SinonSpy.SinonSpy
  mock = SinonMock.SinonMock
  
new_contents: from .lib import SinonBase, SinonSpy, SinonStub, SinonMock, SinonSandbox, SinonAssertion, SinonMatcher 
  
  init = SinonBase.init
  test = SinonSandbox.sinontest
  stub = SinonStub.SinonStub
  spy = SinonSpy.SinonSpy
  mock = SinonMock.SinonMock
  assertion = SinonAssertion.SinonAssertion
  match = SinonMatcher.SinonMatcher
  
subject: add missing lib