@Override
 public IObjectWrapper toScreenLocation(LatLng latLng) throws RemoteException {
   Point point = new Point();
   viewport.toScreenPoint(GmsMapsTypeHelper.fromLatLng(latLng), point);
   return ObjectWrapper.wrap(GmsMapsTypeHelper.toPoint(point));
 }
 @Override
 public IObjectWrapper createSignInButton(IObjectWrapper contextWrapper, int size, int color) {
   Context context = (Context) ObjectWrapper.unwrap(contextWrapper);
   // TODO: real view :)
   return ObjectWrapper.wrap(new View(context));
 }
 @Override
 public LatLng fromScreenLocation(IObjectWrapper obj) throws RemoteException {
   Point point = GmsMapsTypeHelper.fromPoint((android.graphics.Point) ObjectWrapper.unwrap(obj));
   return GmsMapsTypeHelper.toLatLng(viewport.fromScreenPoint((float) point.x, (float) point.y));
 }