human
Solve the following python programming problem given the following code:
def test_create(self) : 
    req_obj = fake_request_spec.fake_spec_obj (remove_id = True) 
    def _test_create_args(self2, context, changes) : 
        self._check_update_primitive (req_obj, changes) 
        changes ['id'] = 42 
        return changes 
with mock.patch.object (request_spec.RequestSpec, '_create_in_db', <MASK>) : 
        req_obj.create () 
    
    Given the code above, what is a proper replacement for <MASK>? Choose among: req_obj, self
assistant
#Here is a proper replacement for <MASK>.
def _test_create_args(