I am trying to create a custom tooltip with the triangle shape on either side. I have created a bubble but how to add the triangle in there without using any library?

class SdToolTip extends StatelessWidget {
  final Widget child;
  final String message;

  const SdToolTip({
    required this.message,
    required this.child,
  });

  @override
  Widget build(BuildContext context) {
    return Center(
      child: Tooltip(
        child: child,
        message: message,
        padding: const EdgeInsets.all(8),
        decoration: BoxDecoration(
            color: Colors.blueAccent.withOpacity(0.6),
            borderRadius: BorderRadius.circular(22)),
        textStyle: const TextStyle(
            fontSize: 15, fontStyle: FontStyle.italic, color: Colors.white),
      ),
    );
  }
}