code: def passing(self, *args, **kwargs):
          
          self.args = args
          self.kwargs = kwargs
          return self
docs: Assign expected call args/kwargs to this call.
  
          Returns `self` for the common case of chaining a call to `Call.returns`
  
          >>> Call().passing('foo', bar='baz')
          <Call args=('foo',) kwargs={'bar': 'baz'}>