mapTemplate(_:waypoint:accepted:forSegment:)

Called when the user responds to a proposal to add a waypoint as a stop on their route. If the waypoint is accepted, perform a reroute to update the route accordingly for the specified segment to include this new destination.

optional func mapTemplate(_ mapTemplate: CPMapTemplate, waypoint: CPNavigationWaypoint, accepted: Bool, forSegment segment: CPRouteSegment?)