flutter mapbox_gl

import 'package:flutter/material.dart';
import 'package:mapbox_gl/mapbox_gl.dart';

class MapboxPage extends StatefulWidget {
  final LatLng coordenadas;
  MapboxPage({Key key, @required this.coordenadas}) : super(key: key);

  @override
  _MapboxPageState createState() => _MapboxPageState();
}

class _MapboxPageState extends State<MapboxPage> {
  MapboxMapController mapController;
  void _onMapCreated(MapboxMapController controller) async {
    mapController = controller;
  }

  @override
  void initState() {
    super.initState();
  }

  @override
  void dispose() {
    mapController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
        body: Container(
      child: MapboxMap(
        accessToken:
            "TOKEN_MAPBOX",
        onStyleLoadedCallback: () => addCircle(mapController),
        onCameraIdle: () {},
        compassEnabled: false,
        trackCameraPosition: true,
        rotateGesturesEnabled: true,
        onMapCreated: _onMapCreated,
        initialCameraPosition: CameraPosition(
          target: widget.coordenadas,
          zoom: 14,
        ),
      ),
    ));
  }

  void addCircle(MapboxMapController mapBoxController) {
    mapBoxController.addCircle(CircleOptions(
        geometry: widget.coordenadas,
        circleColor: '#3E81E7',
        circleRadius: 8));
  }
}