getZoom
Future<void> getZoom ({required GetZoomCallback getZoomCallback})
Return the map's zoom level.
Implementation
Future<void> getZoom({required GetZoomCallback getZoomCallback}) async {
  try {
    final double result = await _channel.invokeMethod('getZoom');
    getZoomCallback(result);
    print("Result from native: $result");
  } on PlatformException catch (e) {
    print("Error from native: $e.message");
  }
}