rayjadore

 String _town; 
  _townField() {
    return FormField<String>(
      validator: (value) {
        if (value == null) {
          return "Select your area";
        }
      },
      onSaved: (value) {
        formData['town'] = value;

HansMuller

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

class Destination {
  const Destination(this.index, this.title, this.icon, this.color);
  final int index;
  final String title;
  final IconData icon;
  final MaterialColor color;
}