private void clearIndividualRoute() {
        individualRoute.clearRoute(routeLayer);
        individualRoute.clearRoute((route) -> {
            routeLayer.updateIndividualRoute(route);
            updateRouteTrackButtonVisibility();
        });
        distanceView.showRouteDistance();
        showToast(res.getString(R.string.map_individual_route_cleared));
    }
initialization with an empty subscription to make static code analysis tools more happy
main/src/main/java/cgeo/geocaching/maps/mapsforge/v6/NewMap.java