fn notify(&mut self) -> Option<Waker> {
        if self.wakers.len() == self.count {
            self.wakers.pop().map(|item| item.1)
        } else {
            None
        }
    }
/// Returns notification callback for a sleeping ticker.
///
/// If a ticker was notified already or there are no tickers, `None` will be returned.
Returns notification callback for a sleeping ticker.
If a ticker was notified already or there are no tickers, `None` will be returned.
Returns notification callback for a sleeping ticker . If a ticker was notified already or there are no tickers ` None ` will be returned .
fn notify(&mut self) -> Option<Waker> {
        if self.wakers.len() == self.count {
            self.wakers.pop().map(|item| item.1)
        } else {
            None
        }
    }
fn notify ( & mut self ) -> Option < Waker > { if self . wakers . len ( ) == self . count { self . wakers . pop ( ) . map ( | item | item . 1 ) } else { None } }
Returns notification callback for a sleeping ticker.
Returns notification callback for a sleeping ticker .
&mut self
&mut self