How to convert Class object to data structure `Map` or a `List of Maps` in Dart?

Based on my experience, dart does not provide that kind of system yet. So, basically we create function like toMap() that manually convert the object to a key-value pair of map.

For example:

class Human {
  String name;
  int age;

  Map<String, dynamic> toMap() {
    return {
      'name': name,
      'age': age,
    };
  }
}

So, later when you have a Human object, you just can call human.tomap().

I do this in most of my entity classes.