how to create singleton in dart

singleton.dart

/**
 * author: malinkaphann@gmail.com
 * how to create singleton class
 */

// singleton class
class MySingleton {

  MySingleton._privateConstructor();

  static final MySingleton instance = MySingleton._privateConstructor();
  
}

// how to call it
void main() {
  
  //MySingleton one = MySingleton();
  
  MySingleton one = MySingleton.instance;
  MySingleton two = MySingleton.instance;
  
  // validate if the two objects about is really the same
  print(one == two);
  
}