Function deser_stringified_format 

pub fn deser_stringified_format<'de, D, T, F, E>(
    deserializer: D,
    parser: F,
) -> Result<T, D::Error>
where
    D: Deserializer<'de>,
    T: DeserializeOwned,
    F: Fn(&str) -> Result<T, E>,
    E: Display,

deserialize a stringified field embedded in other data using a custom parser, allowing you to parse JSON, YAML, or any other serde-compatible format.