How to use with tokio

[D1plo1d]

I see in the example that you mention state_machine_future should work with Tokio but I'm not sure how (I am new to rust). Would it be possible to add a complete tokio example to the docs? What am I doing wrong here?

use tokio::timer::Delay;
use std::time::{Duration, Instant};

impl PollMyStateMachine for MyStateMachine {
    fn poll_start<'a>(
        start: &'a mut RentToOwn<'a, Start>
    ) -> Poll<AfterStart, std::io::Error> {
        println!("STARTING");
        let when = Instant::now() + Duration::from_millis(100);
        let mut task = Delay::new(when)
            .map_err(|e| panic!("delay errored; err={:?}", e))
            .and_then(|_| {
                println!("Hello world!");
                Ok(ShutDown(()))
            })
            .map_err(|e| std::io::Error::new(ErrorKind::Other, "oh no!"));
        let next_state = try_ready!(task.poll());

        transition!(next_state)
    }
}

[bkchr]

Tokio executes Futures and the state machine is a Future.