如何在Dart中合并模型？

import 'package:collection/collection.dart';

void main() {
  Map<String, dynamic> model1 = {
    'name': 'John',
    'age': 25,
  };

  Map<String, dynamic> model2 = {
    'address': '123 Main St',
    'phone': '555-1234',
  };

  // 使用spread操作符合并两个模型
  Map<String, dynamic> mergedModel = {
    ...model1,
    ...model2,
  };

  print(mergedModel);

  // 使用collection库中的merge函数合并两个模型
  Map<String, dynamic> mergedModel2 = merge(model1, model2);

  print(mergedModel2);
}

{name: John, age: 25, address: 123 Main St, phone: 555-1234}
{name: John, age: 25, address: 123 Main St, phone: 555-1234}