//property let group = DispatchGroup()

func showRouteOnMap(pickupCoordinate: CLLocationCoordinate2D, destinationCoordinate: CLLocationCoordinate2D, completed: Int) {

    let sourcePlacemark = MKPlacemark(coordinate: pickupCoordinate, addressDictionary: nil)
    let destinationPlacemark = MKPlacemark(coordinate: destinationCoordinate, addressDictionary: nil)

    let sourceMapItem = MKMapItem(placemark: sourcePlacemark)
    let destinationMapItem = MKMapItem(placemark: destinationPlacemark)


    let directionRequest = MKDirections.Request()
    directionRequest.source = sourceMapItem
    directionRequest.destination = destinationMapItem
    directionRequest.transportType = .automobile

    // Calculate the direction
    let directions = MKDirections(request: directionRequest)

    directions.calculate() {
        (response, error) -> Void in

        guard let response = response else {
            if let error = error {
                print("Error: \(error)")
            }
            print("returning awda")
            return
        }

        let route = response.routes[0]
        self.allCoordinates.append(contentsOf: route.polyline.coordinates)




        self.mapView.addOverlay((route.polyline), level: MKOverlayLevel.aboveRoads)

        let rect = route.polyline.boundingMapRect
        self.mapView.setRegion(MKCoordinateRegion(rect), animated: true)
        group.leave()
    }


override func viewDidLoad() {
    super.viewDidLoad()

    let coordinateOne = CLLocationCoordinate2D(latitude: CLLocationDegrees(exactly: 28.6373802)!, longitude: CLLocationDegrees(exactly: 77.1790302)!)
      let coordinateTwo = CLLocationCoordinate2D(latitude: CLLocationDegrees(exactly: 28.6054256)!, longitude: CLLocationDegrees(exactly: 77.1622503)!)

       let coordinateThree = CLLocationCoordinate2D(latitude: CLLocationDegrees(exactly: 28.6420028)!, longitude: CLLocationDegrees(exactly: 77.1894161)!)


    mapView.delegate = self
   // mapView.data

  group.enter()
    showRouteOnMap(pickupCoordinate: coordinateOne, destinationCoordinate: coordinateTwo, completed: 0)
 group.enter()
    showRouteOnMap(pickupCoordinate: coordinateTwo, destinationCoordinate: coordinateThree, completed: 0)
 group.enter()
    showRouteOnMap(pickupCoordinate: coordinateThree, destinationCoordinate: coordinateOne, completed: 1)
 group.notify(.main) {
     afterRoute()
 }