unwrap

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if segue.identifier == "pushDetail" {
            
            let cell = sender as! UITableViewCell
            let indexPath = tableView.indexPathForCell(cell)!
            
            let timerModel: TimerModel = {
                if indexPath.section == 0 {
                    return self.coffeeTimers[indexPath.row]
                } else {
                    return self.teaTimers[indexPath.row]
                }
            }()
            
            let detailViewController = segue.destinationViewController as? TimerDetailViewController
            
            detailViewController?.timerModel = timerModel
            
        }
    }