Function deserialize_optional_string_to_u64 

pub fn deserialize_optional_string_to_u64<'de, D>(
    deserializer: D,
) -> Result<Option<u64>, D::Error>
where
    D: Deserializer<'de>,

Deserializes an optional numeric string into Option<u64>.

Errors

Returns an error under the same cases as deserialize_string_to_u64.