De-Morgan

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

void main() {
  runApp(ProviderScope(child: DarkModeExample()));
}

class DarkModeExample extends ConsumerWidget {
  // This widget is the root of your application.

De-Morgan

import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
    debugShowCheckedModeBanner: false,
    home: FormValidationExample(),
  ));
}

class FormValidationExample extends StatelessWidget with InputValidationMixin {

De-Morgan

main() {
  Widget _loadLoginPage() => MaterialApp(
        home: Scaffold(
          body: LoginPage(),
        ),
      );

  testWidgets("Find one Image in Login Screen",
      (WidgetTester widgetTester) async {
    await widgetTester.pumpWidget(_loadLoginPage());

De-Morgan

import 'package:email_validator/email_validator.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:fluttertoast/fluttertoast.dart';

void main() => runApp(MyApp());



class MyApp extends StatelessWidget {

De-Morgan

<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/navigation"
    app:startDestination="@id/postsOverviewFragment">

    <fragment
        android:id="@+id/postsOverviewFragment"
        android:name="posts_overview.PostsOverviewFragment"
        android:label="PostsOverviewFragment"

De-Morgan

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <fragment
        android:id="@+id/myNavHostFragment"

De-Morgan

class PostsOverviewFragment : Fragment() {

    lateinit var binding: PostsOverviewFragmentBinding

    private val postViewModel: PostsOverviewViewModel by lazy{
        ViewModelProviders.of(this).get(PostsOverviewViewModel::class.java)
    }

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,

De-Morgan

class PostsOverviewViewModel : ViewModel() {

    private val _posts = MutableLiveData<List<Post>>()
    val post: LiveData<List<Post>>
        get() = _posts

    init {
       getPosts()
    }

De-Morgan

class PostListAdapter: RecyclerView.Adapter<PostListAdapter.ViewHolder>(){
    var  data = listOf<Post>()
    set(value) {
       field = value
        notifyDataSetChanged()
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        return  ViewHolder.from(parent)

De-Morgan

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <data>
        <variable
            name="viewModel"
            type="posts_overview.PostsOverviewViewModel" />
    </data>