latLngToXY method
Converts a point on the sphere surface (with a certain zoom) in a map point.
Implementation
@override
(double, double) latLngToXY(LatLng latlng, double scale) {
final (x, y) = projection.projectXY(latlng);
final transformation = _getTransformationByZoom(zoom(scale));
return transformation.transform(x, y, scale);
}