gistfile1.txt

fn from_value<'de, D, T>(deserializer: D) -> Result<T, D::Error>
where 
    D: Deserializer<'de>,
    T: serde::de::DeserializeOwned,
{
    #[derive(Debug, Deserialize)]
    struct Wrapper<T> {
        value: T,
    }
    let val = Wrapper::deserialize(deserializer)
        .map_err(de::Error::custom)?;
    Ok(val.value)
}