Function try_blocking 

pub fn try_blocking<T, E>(
    f: impl FnOnce(Sender<T>) -> Result<(), E> + Send + 'static,
) -> Task<Result<T, E>>
where
    T: Send + 'static,
    E: Send + 'static,

Creates a new Task that will run the given closure that can fail in a new thread.

Any data sent by the closure through the mpsc::Sender will be produced by the Task.