Contact data interface

contact_data.dart

import 'dart:async';

class Contact {
  final String fullName;
  final String email;

  const Contact({this.fullName, this.email});
}


abstract class ContactRepository {
  Future<List<Contact>> fetch();
}

class FetchDataException implements Exception {
  String _message;

  FetchDataException(this._message);

  String toString() {
    return "Exception: $_message";
  }
}