GraphView Widget doesn't use paint parameter. Cannot specify all Edge's paint style at one time

[z2z63]

Hi, I am using GraphView to paint a directed graph and want to specify all Edge to be grey at one time, however I found I can only specify each edge paint style every time I add edge to graph.

  void addEdge(String a, String b) {
    a = Uri.decodeComponent(a);
    b = Uri.decodeComponent(b);
    if(a == b){
      return;
    }
    if((a.endsWith('/') || a.endsWith('.html')) && (b.endsWith('/')  || b.endsWith('.html'))){
      graph.addEdge(
        _nodes.putIfAbsent(a, () => Node.Id(a)),
        _nodes.putIfAbsent(b, () => Node.Id(b)),
        paint: Paint()
          ..color = Colors.grey
          ..strokeWidth = 0.2
          ..style = PaintingStyle.stroke
      );
      notifyListeners();
    }
  }

Then I read the source code and found that GrapView Widget doesn't use paint parameter at all !

here is my code

          return GraphView(
            graph: notifier.graph,
            algorithm: FruchtermanReingoldAlgorithm(
              attractionRate: 0.014,
              repulsionRate: 1,
              repulsionPercentage: 1,
              iterations: 1000,
            ),
            paint: Paint()
              ..color = Colors.grey
              ..strokeWidth = 0.2
              ..style = PaintingStyle.stroke,
            builder: (Node node) {
              // I can decide what widget should be shown here based on the id
              var a = node.key?.value as String;
              return rectangleWidget(a);
            },
          );

paint goes down to GraphView then _GraphViewState, _GraphViewAnimated, finally _GraphViewAnimatedState. _GraphViewAnimatedState doesn't use paint that I specified. Instead, In _GraphViewAnimatedState’s build method, I found this

CustomPaint(
          size: MediaQuery.of(context).size,
          painter: EdgeRender(algorithm, graph, Offset(20, 20)),
        ),

In EdgeRender's paint method, it just constructs a new paint with some configuration

  @override
  void paint(Canvas canvas, Size size) {
    var edgePaint = (Paint()
      ..color = Colors.black
      ..strokeWidth = 3)
      ..style = PaintingStyle.stroke
      ..strokeCap = StrokeCap.butt;

    canvas.save();
    canvas.translate(offset.dx, offset.dy);

    algorithm.renderer!.render(canvas, graph, edgePaint);
    canvas.restore();
  }

So I think the paint parameter of GraphView widget has no meaning, could you please fix it?