Function spawn_fifo_and_convert

pub async fn spawn_fifo_and_convert<E: 'static + Error + Into<BoxError> + Sync + Send, F: 'static + FnOnce() -> Result<(), E> + Send>(
    f: F,
) -> Result<(), BoxError>

Fires off a task into the Rayon threadpool, awaits the result through a oneshot channel, then converts the error to a BoxError.