content: import 'package:flutter/material.dart';
  
  Future<void> paymentNotSupportedDialog(context) async {
    return showDialog<void>(
      context: context,
      builder: (BuildContext dialogContext) {
        return AlertDialog(
          title: const Text('Transaction not supported'),
          content: SingleChildScrollView(
            child: ListBody(
              children: <Widget>[
                Column(
                  children: const [
                    Padding(
                      padding: EdgeInsets.all(15),
                      child: Icon(
                        Icons.error_outline_outlined,
                        color: Colors.red,
                        size: 35,
                      ),
                    ),
                    Text("Unfortunately, token payments are not supported yet."),
                  ],
                ),
              ],
            ),
          ),
          actions: <Widget>[
            TextButton(
              child: const Text('Dismiss'),
              onPressed: () async {
                // Close the dialog
                Navigator.of(dialogContext).pop();
              },
            ),
          ],
        );
      },
    );
  }
  