maps sample - onAddMarkerButtonPressed

main.dart

void _onAddMarkerButtonPressed() {
 mapController.addMarker(
   MarkerOptions(
     position: LatLng(
       mapController.cameraPosition.target.latitude,
       mapController.cameraPosition.target.longitude,
     ),
     infoWindowText: InfoWindowText('Random Place', '5 Star Rating'),
     icon: BitmapDescriptor.defaultMarker,
   ),
 );
}