Function bip_util::send::split_sender

pub fn split_sender<S, T>(
    send: S, 
    cap_one: usize, 
    cap_two: usize
) -> (SplitSender<S>, SplitSender<S>) where
    S: TrySender<T> + Clone,
    T: Send, 

Create two SplitSenders over a single Sender with corresponding capacities.