Method get_msg

flow-rs/src/loader/python/envelope.rs:87–90

(&self, py: Python)

    #[getter(msg)]
    fn get_msg(&self, py: Python) -> PyObject {
        let envelope = self.imp.as_ref().expect(ERR_MSG);
        envelope.get_ref().clone_ref(py)
    }

    #[setter(msg)]
    fn set_msg(&mut self, msg: PyObject) {