Function deserialize_dedup 

pub fn deserialize_dedup<'de, T, R, State, D>(
    state: &State,
    deserializer: D,
    build: impl FnOnce(R) -> T,
) -> Result<T, D::Error>
where
    T: Dedup,
    R: DeserializeState<'de, State>,
    State: DedupSerializerState,
    D: Deserializer<'de>,

Deserialize a value that may have been deduplicated. build reconstructs the value from its serialized form.