@Override
  public void apply(final ChangeListWorker worker) {
    myOldComment = worker.editComment(myName, myNewComment);

    if (myOldComment != null && !Objects.equals(myOldComment, myNewComment)) {
      myListCopy = worker.getChangeListByName(myName);
    }
    else {
      myListCopy = null; // nothing changed, no notify
    }
  }
@Override
  public void apply(final ChangeListWorker worker)