anchor.diff:    clearSelection([bool preventSelection = false]) {
       selectedNote = null;
       if (preventSelection) {
  -      ignoreSelection = true;
  +      _ignoreSelection = true;
       }
     }
   
     _addNote(String title, String content) {
  -    noteStore.add(noteFactory.create(title, content));
  +    noteStore.add(_noteFactory.create(title, content));
     }
   
     deleteMe(Note note) {
  
positive.code:   }
  
    selectNote(Note note) {
      if (ignoreSelection) {
        ignoreSelection = false;
        return;
      }
      this.selectedNote = note;
  
negative.code: class AppComponent {
    Store noteStore;
    Note selectedNote = null;
    NoteFactory _noteFactory;
  
    String newTitle;
    String newContent;
  
    bool showAll = false;
  
    bool _ignoreSelection = false;
  
    AppComponent(this.noteStore, this._noteFactory);
  
    enterNote() {
      _addNote(newTitle, newContent);
  