import 'package:custom_dropdown/custom_dropdown.dart';

class Person extends CustomDropdownData{  
  final int id;  
  final String name;  
  
  Person({  
    this.id,  
    this.name,  
  });  
  
  @override  
  CustomDropdownModel toDropdownDataModel() {  
    return CustomDropdownModel(name: this.name, value: this.id);  
  }  
}

List<Person> people = [  
  Person(id: 1, name: "Boris"),  
  Person(id: 2, name: "Didier"),  
  Person(id: 3, name: "Innocent"),  
  Person(id: 4, name: "Jean-François"),  
  Person(id: 5, name: "Jean-Jacques"),  
];

...

CustomDropDown(  
  onChanged: (int id){  
    print("selected id = $id");  
  },  
  items: people,  
)