Map<String, dynamic> data = {
  "name":"길동",
  "age":10
};

void main() {
  print(data["name"]);
  print(data["age"]);
}

class Person {
  String name;
  int age;
  
  Person({required this.name, required this.age});
  
  Person.fromMap(Map<String, dynamic> data) :
    name = data["name"],
    age = data["age"];
  
  Map<String, dynamic> toMap() => {
    "name" : name,
    "age" : age
  };
  
}

void main() {
  Person p = Person(name: "길동", age: 10);
  
  var t1 = p.toMap();
  print(t1);
 
  var t2 = Person.fromMap(t1);
  print(t2.name);
  print(t2.age);
}