addMarker
fun GoogleMap.addMarker(location: Location, @DrawableRes icon: Int? = null, title: String? = null, tag: String): Marker?
fun GoogleMap.addMarker(location: Location, icon: Bitmap, title: String? = null, tag: String): Marker?
fun GoogleMap.addMarker(latLng: LatLng, @DrawableRes icon: Int? = null, title: String? = null, tag: String): Marker?