docs: def not_called_with(self, *args, **kwargs):
          """Return True if spy was not called with the specified args/kwargs.
  
          Otherwise raise VerificationError.
  
          """
          call = Call(*args, **kwargs)
          if call in calls(self.spy):
              raise VerificationError(
                  'expected %s to not be called with %s, but it was' % (
                      self.spy, call.formatted_args))
          return True