Function deserialize_empty_ustr_as_none 

pub fn deserialize_empty_ustr_as_none<'de, D>(
    deserializer: D,
) -> Result<Option<Ustr>, D::Error>
where
    D: Deserializer<'de>,

Deserializes an empty [Ustr] into None.

Errors

Returns an error if the JSON value cannot be deserialised into a string.