startNavigation method
Implementation
@override
Future<void> startNavigation(double startLat, double startLng,
double endLat, double endLng) async {
await methodChannel
.invokeMethod<String>('startNavigation', <String, dynamic>{
"startLat": startLat,
"startLng": startLng,
"endLat": endLat,
"endLng": endLng
});
}