fn manually_deserialize_dyn() {

    let ron = r#"SerializeDyn(

        type: "engine_utils::types::registry::tests::Player",

    )"#;

    let mut de = ron::Deserializer::from_bytes(ron.as_bytes()).unwrap();

    let result = de

        .deserialize_struct("SerializeDyn", &["type"], SerializeDynVisitor)

        .unwrap();

    assert_eq!(

        *result.downcast::<Option<(String, String)>>().unwrap(),

        Some((

            String::from("type"),

            String::from("engine_utils::types::registry::tests::Player")

        ))

    );

}

    fn visit_map<A: MapAccess<'de>>(self, mut map: A) -> Result<Self::Value, A::Error> {

        let entry = map.next_entry::<&str, String>()?;

        Ok(Box::new(entry.map(|(k, v)| (String::from(k), v))))

    }