Switch statement using runtimeType in Dart

main.dart

main(){
  var a = B();
  switch(a.runtimeType){
    case A:{
      print ("A");
      break;
    }
      case B:{
      print ("B");
      break;
    }
    default:
      {
        print ("No match. ${a.runtimeType}");
      }
  }
}
class A {}
class B  {}