Function spawn 

pub fn spawn<Fut>(fut: Fut) -> AnyExecutorTask<Fut::Output> 
where
    Fut: Future<Output: Send> + Send + 'static,

Available on crate feature std only.

Spawn a Send future on the global executor.

The global executor must be initialized with init_global_executor before calling this function.

Panics

Panics if the global executor has not been set.