fn wake_io(&mut self) {
        if let Some(waker) = self.io_task.take() {
            waker.wake();
        }
    }
/// Wake up future feeding data to Payload.
Wake up future feeding data to Payload.
Wake up future feeding data to Payload .
fn wake_io(&mut self) {
        if let Some(waker) = self.io_task.take() {
            waker.wake();
        }
    }
fn wake_io ( & mut self ) { if let Some ( waker ) = self . io_task . take ( ) { waker . wake ( ) ; } }
Wake up future feeding data to Payload.
Wake up future feeding data to Payload .
&mut self
&mut self