anchor.diff:    return li;
   }
   
  +DivElement taskContainer(String tasksummary) {
  +  DivElement div = new DivElement();
  +  div
  +    ..classes.add('taskcontainer')
  +    ..append(singleTaskElement(tasksummary))
  +    ..append(editTaskElement(tasksummary));
  +  return div;
  +}
  +
   // append for each task in tasks a singletask
   // element to div '#listtasks'.
   void displayTasks() {
  
positive.code:     div.append(singleTaskElement(i['summary']));
      div.append(editTaskElement(i['summary']));
    });
      
  }
  // insert Task into displayed tasklist at index 0;
  void insertTask(String tasksummary) {
    LIElement st = singleTaskElement(tasksummary);
    querySelector('#listtasks').children.insert(0,st);
  }
negative.code: import 'dart:html';
  import 'package:ddays/storageservice.dart' show loadFromStorage;
  
  LIElement singleTaskElement(String tasksummary) {
    LIElement li = new LIElement();
    ParagraphElement p = new ParagraphElement();
    p
      ..text = tasksummary
      ..classes.add('summarytext');
    li
      ..classes.add('singletask')
  