starlight_country_picker: 
    git:
      url: https://github.com/YeMyoAung/starlight_country_picker.git

import 'package:starlight_country_picker/country_picker.dart';

import 'package:flutter/material.dart';
import 'package:starlight_country_picker/country_picker.dart';

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return  ElevatedButton(
        onPressed: () async {
          final Country? _country = await countryPicker(
                        context,///required
                        selectedColor: Colors.green,///optional
                        unSelectedColor: Colors.black,///optional
                        supportedCountry: [],///optional
                        addNewSupportedCountry: [],///optional
                        width: 100,///optional
                        height: 100,///optional
                        backgroundColor: Colors.white,///optional
                        hintStyle: TextStyle(),///optional
                        barrierDismissible: true,///optional
                        barrierColor: Colors.black54,///optional
                    );
          print(_country.toString());
        },
        child: const Text(
          "Country Picker",
          style: TextStyle(
            fontSize: 18,
            fontWeight: FontWeight.bold,
          ),
        ),
    );
  }
}

const Country country =  Country(dialCode: '+95',name: 'Myanmar',flag: '🇲🇲');