Function cbor_det_map_get

pub fn cbor_det_map_get<'a>(
    x: CborDetMap<'a>,
    k: CborDet<'a>,
) -> Option<CborDet<'a>>

Looks up a map x for an entry associated to the key k. If such an entry exists, returns Some(object) where object is the value associated to that key. Otherwise, returns None.