Function spawn_at 

pub fn spawn_at<F>(
    future: F,
    meta: SpawnMeta,
) -> JoinHandle<<F as Future>::Output> 
where
    F: Future + 'static,

Available on crate feature runtime only.

Spawns a new asynchronous task, attributing it to meta instead of to the caller.

See Runtime::spawn_at for what meta is good for.

Panics

This method doesn’t create runtime. It tries to obtain the current runtime by Runtime::with_current.