Function parse_with_config 

pub fn parse_with_config<T>(
    input: &str,
    config: &ParserConfig,
) -> Result<Vec<T>>
where
    T: DeserializeOwned + Send + 'static,

Deserialise every document with a caller-supplied parser policy. Document-count and per-document limits are enforced before and during parallel work. Streams with fewer than four documents stay sequential to avoid Rayon scheduling overhead.

Errors

Returns the first document or budget error in source order.