Pass data to StatelessWidget

item.dart

import 'package:flutter/material.dart';

class Item extends StatelessWidget {
  Item({Key key, this.param}) : super(key: key);
  
  final Map param;
  
  @override
  Widget build(BuildContext context) {
    return Container(
      child: new Column(
        children: [
          new Text(param['name']),
          new Text(param['email']),
        ],
      ),
    );
  }
}

main.dart

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

class MyApp extends StatelessWidget {
  List data = [];
  
  @override
  initState() {
    super.initState();
    
    http.get('https://api.androidhive.info/contacts/').then((response) {
      setState(() {
        data = json.decode(response.body);
      });
    });
  }
  
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      theme: new ThemeData(
        primarySwatch: Colors.blueGrey,
      ),
      home: new Scaffold(
        body: new Column(
          children: [
            new Item(param: data[0]),
            new Item(param: data[1]),
            new Item(param: data[2]),
          ],
        ),
      ),
    );
  }
}