fn pyo3_get_value_into_pyobject_ref<ClassT, FieldT, Offset>(
py: Python<'_>,
obj: *mut PyObject,
) -> PyResult<*mut PyObject>where
ClassT: PyClass,
for<'a, 'py> &'a FieldT: IntoPyObject<'py>,
Offset: OffsetCalculator<ClassT, FieldT>,