pub fn spawn_scoped<'scope, 'env, D, F, T>( nid: &NodeId, label: D, scope: &'scope Scope<'scope, 'env>, f: F, ) -> ScopedJoinHandle<'scope, T>where D: Display, F: FnOnce() -> T + Send + 'scope, T: Send + 'scope,
Spawn a scoped OS thread.