86     pub fn spawn<Fut>(self, future: Fut) -> io::Result<JoinHandle<Fut::Output>>  in spawn()
88         Fut: Future + Send + 'static,  in spawn()
89         Fut::Output: Send + 'static,  in spawn()
102     pub fn spawn_on<Fut>(self, future: Fut, handle: &Handle) -> io::Result<JoinHandle<Fut::Output>>  in spawn_on()  argument
104         Fut: Future + Send + 'static,  in spawn_on()
105         Fut::Output: Send + 'static,  in spawn_on()
125     pub fn spawn_local<Fut>(self, future: Fut) -> io::Result<JoinHandle<Fut::Output>>  in spawn_local()
127         Fut: Future + 'static,  in spawn_local()
128         Fut::Output: 'static,  in spawn_local()
141     pub fn spawn_local_on<Fut>(  in spawn_local_on()
143         future: Fut,  in spawn_local_on()  argument
145     ) -> io::Result<JoinHandle<Fut::Output>>  in spawn_local_on()
147         Fut: Future + 'static,  in spawn_local_on()
148         Fut::Output: 'static,  in spawn_local_on()