in later/unittest/backport/mock.py [0:0]
def _set_return_value(mock, method, name):
fixed = _return_values.get(name, DEFAULT)
if fixed is not DEFAULT:
method.return_value = fixed
return
return_calculator = _calculate_return_value.get(name)
if return_calculator is not None:
return_value = return_calculator(mock)
method.return_value = return_value
return
side_effector = _side_effect_methods.get(name)
if side_effector is not None:
method.side_effect = side_effector(mock)