Function deterministic::spawn::spawn_with_random_prio

pub fn spawn_with_random_prio<F, T>(f: F) -> JoinHandle<T>where
    F: FnOnce() -> T,
    F: Send + 'static,
    T: Send + 'static,

Spawn a thread with a thread priority determined by a (possibly pre-seeded) rand::Rng.