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import 'package:flutter/material.dart';
import 'package:chess_vectors_flutter/chess_vectors_flutter.dart';

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {

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class _DiamondBorder extends ShapeBorder {
  const _DiamondBorder();

  @override
  EdgeInsetsGeometry get dimensions {
    return const EdgeInsets.only();
  }

  @override
  Path getInnerPath(Rect rect, { TextDirection textDirection }) {

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library chess_board;

import 'dart:async';

import 'package:chess_vectors_flutter/chess_vectors_flutter.dart';
import 'package:flutter/material.dart';
import 'package:chess/chess.dart' as chess;

typedef Null MoveCallback(String moveNotation);
typedef Null CheckMateCallback(String winColor);

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import 'package:flutter/material.dart';
import 'package:medium_app_ui/NewsArticle.dart';
import 'package:medium_app_ui/NewsHelper.dart';

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

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

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import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Home',
      theme: new ThemeData(

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import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(

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main() {
  
 var number = 5;
  
 var demoString = "The number is $number";
  
}

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main() {
 
  Box box1 = new Box();
  
  box1?.destroy();
  
}

//This is equivalent to

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class Point {
  num x, y;

  Point(this.x, this.y);

  // Named constructor
  Point.origin() {
    x = 0;
    y = 0;

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class Box {

  int _length, _width, _height;
  
  Box(this._length, this._width, this._height);

}