Polyline with gradient across width in iOS Google Maps SDK

Question

I have iOS app with the Google Maps SDK integrated. My route has default style and I'm able to change the color to be gradient in length via spans.

Is it possible to update polyline color and define gradient in width instead (like original Google Maps app has)?:

UPDATE: I have added limited version by using two identical polylines with different styles but I'm definitely looking for a better solution:

I followed the official documentation and didn't find any references of that.

Answer 1

I do this:

GMSPath *path = [GMSPath pathFromEncodedPath:overview_route];
GMSPolyline *polyline = [GMSPolyline polylineWithPath:path];
polyline.strokeWidth = 5;

GMSStrokeStyle *greenToRed = [GMSStrokeStyle gradientFromColor:[UIColor greenColor] toColor:[UIColor redColor]];
polyline.spans = @[[GMSStyleSpan spanWithStyle:greenToRed]];
polyline.map = self.mapView;