xvrh

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:math' as math;
import 'dart:ui' show window;

import 'package:flutter/foundation.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/services.dart';

xvrh

void main() {
  var list = ['a', 'b', 'c'];

  String? d = list.firstWhere((e) => e == 'd', orElse: () => null);
}

xvrh

import 'dart:io';

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

void main() => runApp(MaterialApp(home: Home()));

class Home extends StatelessWidget {
  @override

xvrh

import 'dart:io';
import 'dart:developer' as dev;
import 'package:shelf/shelf_io.dart' as io;
import 'package:shelf/shelf.dart' as shelf;
import 'package:vm_service/utils.dart';
import 'package:vm_service/vm_service.dart';
import 'package:vm_service/vm_service_io.dart';
import 'package:watcher/watcher.dart';
import 'package:stream_transform/stream_transform.dart';