extension_example.dart

import 'package:flutter/material.dart';

typedef GetString<T> = String Function(T from);

class MyObject{
  String title;
  String name;
  MyObject(this.title, this.name);
}

extension StringExt on String {
  Widget toTextWidget() {
    return Text(this);
  }
}

extension ListExt on List {
  List<Widget> toListTile(GetString titleHolder) {
    return this.map((e) => ListTile(title: titleHolder(e).toTextWidget())).toList();
  }
}

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

class MyApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: Column(
            children:[
              MyObject("Title One", "one"),
              MyObject("Title Two", "one"),
              MyObject("Title three", "one"),
              MyObject("Title four", "one"),
            ].toListTile((e) => e.title),
          ),
        ),
      ),
    );
  }
}