pub fn pop(&mut self) -> Option<T> {
        match self.timers.front() {
            None => return None,
            Some(timer) if timer.time != self.tick => return None,
            _ => {}
        };
        self.timers.pop_front().map(|t| t.data)
    }
/// Pop an expired timer after `tick`.
///
/// This must be called after calling `tick`,
/// and should be called multiple times until return `None`.
Pop an expired timer after `tick`.
This must be called after calling `tick`,
and should be called multiple times until return `None`.
Pop an expired timer after ` tick ` . This must be called after calling ` tick ` and should be called multiple times until return ` None ` .
pub fn pop(&mut self) -> Option<T> {
        match self.timers.front() {
            None => return None,
            Some(timer) if timer.time != self.tick => return None,
            _ => {}
        };
        self.timers.pop_front().map(|t| t.data)
    }
pub fn pop ( & mut self ) -> Option < T > { match self . timers . front ( ) { None => return None , Some ( timer ) if timer . time != self . tick => return None , _ => { } } ; self . timers . pop_front ( ) . map ( | t | t . data ) }
Pop an expired timer after `tick`.
Pop an expired timer after ` tick ` .
&mut self
&mut self