Observable<T> class

Base class for observable object

You can get stream of object changes and also update object data

Example:

void example() {
  final username = Observable<String>.initial("Ted");

  final subscription = username.stream.listen((name) {
    // do something with name
  });

  username.update('John');

  print('current username=${username.current}');

  subscription.cancel();
  username.dispose();
}