SuperPenguin

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(

SuperPenguin

import 'dart:async';

import 'package:flutter/material.dart';

Future<T> showLoading<T>({
  required BuildContext context,
  required Future<T> future,
  String? message,
}) {
  final completer = Completer<T>();

SuperPenguin

import 'dart:async';

import 'package:flutter/foundation.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();

  runApp(const App());

SuperPenguin

import 'package:flutter/material.dart';
import 'dart:math' as math;

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();

  runApp(const App());
}

class App extends StatelessWidget {