anchor.diff:      print(req.responseText);
     });
     print(JSON.encode(quiz));
  -  req.send(quiz);
  +  req.send(JSON.encode(quiz));
   }
   
   Future handleQuizForm(
  
positive.code:       setupQuizzes(quizElem);
      });
    document.body.children..add(elem)..add(formElem)..add(quizElem);
    setupQuizForm(formElem);
  }
  
negative.code: 
  Future loadQuiz(int id, Element quizElement) async {
    Map quiz = await getQuiz(id);
    quizElement.children = [];
    if (quiz["maybequiz"] == null) {
      quizElement.text = "Could not load quiz with ID ${quiz['id']}";
    } else {
  