Widget build()

in packages/google_maps_flutter/google_maps_flutter/example/lib/place_polygon.dart [168:267]
100 lines of code
11 McCabe index (conditional complexity)

  Widget build(BuildContext context) {
    final PolygonId? selectedId = selectedPolygon;
    return Column(
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: <Widget>[
        Center(
          child: SizedBox(
            width: 350.0,
            height: 300.0,
            child: GoogleMap(
              initialCameraPosition: const CameraPosition(
                target: LatLng(52.4478, -3.5402),
                zoom: 7.0,
              ),
              polygons: Set<Polygon>.of(polygons.values),
              onMapCreated: _onMapCreated,
            ),
          ),
        ),
        Expanded(
          child: SingleChildScrollView(
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
              children: <Widget>[
                Row(
                  children: <Widget>[
                    Column(
                      children: <Widget>[
                        TextButton(
                          child: const Text('add'),
                          onPressed: _add,
                        ),
                        TextButton(
                          child: const Text('remove'),
                          onPressed: (selectedId == null)
                              ? null
                              : () => _remove(selectedId),
                        ),
                        TextButton(
                          child: const Text('toggle visible'),
                          onPressed: (selectedId == null)
                              ? null
                              : () => _toggleVisible(selectedId),
                        ),
                        TextButton(
                          child: const Text('toggle geodesic'),
                          onPressed: (selectedId == null)
                              ? null
                              : () => _toggleGeodesic(selectedId),
                        ),
                      ],
                    ),
                    Column(
                      children: <Widget>[
                        TextButton(
                          child: const Text('add holes'),
                          onPressed: (selectedId == null)
                              ? null
                              : ((polygons[selectedId]!.holes.isNotEmpty)
                                  ? null
                                  : () => _addHoles(selectedId)),
                        ),
                        TextButton(
                          child: const Text('remove holes'),
                          onPressed: (selectedId == null)
                              ? null
                              : ((polygons[selectedId]!.holes.isEmpty)
                                  ? null
                                  : () => _removeHoles(selectedId)),
                        ),
                        TextButton(
                          child: const Text('change stroke width'),
                          onPressed: (selectedId == null)
                              ? null
                              : () => _changeWidth(selectedId),
                        ),
                        TextButton(
                          child: const Text('change stroke color'),
                          onPressed: (selectedId == null)
                              ? null
                              : () => _changeStrokeColor(selectedId),
                        ),
                        TextButton(
                          child: const Text('change fill color'),
                          onPressed: (selectedId == null)
                              ? null
                              : () => _changeFillColor(selectedId),
                        ),
                      ],
                    )
                  ],
                )
              ],
            ),
          ),
        ),
      ],
    );
  }