build method Null safety

  1. @override
dynamic build(
  1. dynamic context
)

Implementation

@override
Widget build(BuildContext context) {
  return AnimatedBuilder(
    animation: _animationController,
    builder: (BuildContext context, Widget? child) {
      return Center(
        child: CustomPaint(
          size: widget.boxSize,
          painter: _Painter(
            lineLength: widget.lineLength,
            lineOpacity: _animationController.value,
          ),
        ),
      );
    },
  );
}