Function oneshot 

pub fn oneshot<T>() -> Option<(GenericOneshotSender<T>, GenericOneshotReceiver<T>)>
where
    T: for<'de> Deserialize<'de> + Serialize,

Creates a oneshot generic channel. This channel allows only a fixed capacity and might have other optimizations. The send and receive methods will consume the Sender/Receiver. We will automatically select ipc or crossbeam channels.