How to Change Map data to List Data in Flutter

 void main(){

 

 Map map = {'Jack': "23", 'Adam': "27", 'Katherin': "25"};

 var list = [];

  map.forEach((k,v){

    return list.add(Customer().valuecoming(k,v));

  });

    

  print(list);

}

class Customer {

  String name ;

  String age;

  String valuecoming (name,age){

    return '$name,$age';

  }

  

}

Note: we cannot direct return value through class we need to create method/function to return value.