flutter dart Map 을 List 로 변환하기

List list = [];
list.add(Customer('Jack', 23));
list.add(Customer('Adam', 27));
list.add(Customer('Katherin', 25));
...

var map1 = Map.fromIterable(list, key: (e) => e.name, value: (e) => e.age);
print(map1);

{Jack: 23, Adam: 27, Katherin: 25}