             return DateInterval(start: timerElapsesOnDate, end: currentDate).duration * -1.0
         } else {
             return DateInterval(start: currentDate, end: timerElapsesOnDate).duration
-        }
+        }*/
+        return 0.0
     }
 }
 

    }
    
    func sessionStarted() {
        
    }
    
    func sessionEnded() {
        
    }
    
    func countdownExpired() {
        
    }
}

    
    @IBAction func actionStart(_ sender: Any) {
        
        sessionControl.start()
    }
    
    fileprivate func updateCurrentState(_ currentState: CurrentState) {
        
        let newImage = currentState == .active ? UIImage(named: "pause_100")! : UIImage(named: "play-100")!
       
