increment method

@JSExport() void increment(dynamic lat, dynamic lon)

This a internal callback when user click on marker

param: lat - latitude on point lon - longitude of point

Implementation

@JSExport()
void increment(var lat, var lon) {
  try {
    LatLng point = LatLng(lat, lon);

    if (widget.controller!.markers.containsKey(point)) {
      widget.controller!.markers[point]!(point);
    } else {}
  } catch (_) {}
}