Function from_str 

pub fn from_str<'de, D: Deserializer<'de>, T: FromStr>(
    deserializer: D,
) -> Result<T, D::Error>
where
    <T as FromStr>::Err: Debug,

Deserializes a type using its FromStr implementation.

Errors

1. If a string cannot be parsed from the deserializer.
2. If the type cannot be parsed from the string.