Function run 

pub async fn run<B, C, A, Sends, Br>(
    behavior: B,
    mailbox: Consumer<C, B::Msg>,
    from: A,
) -> Result<Transcript<A, Sends, Br::Child>, B::Error>
where
    A: Address,
    Sends: SendAlgebra,
    Br: BirthMode,
    B: Behavior<Addr = A, Ph = Never, Sends = Sends, Birth = Br>,

Drive user-lane messages through a complete behavior protocol.

Errors

Returns the first controlled behavior failure.