Factory constructor in Dart

main.dart

class Universe{
  
  String name;
  
  static Universe u = Universe.init(); 
  
  factory Universe(){
    return u;
  }
  
  Universe.init(){
    name = "A";
  }
}

  
void main() {
  Universe u1 = Universe(); 
  Universe u2 = Universe();
  
  u1.name = "B";
  
  print(u1.name);  // "B"
  print(u2.name);  // "B"
}