/** {@inheritDoc} */
 @Override
 public void clear() {
   super.clear();
   this.fileReference = null;
   resetEditableCard();
 }
 /**
  * Обработчик нового состояния.
  *
  * @param newWorkstate новое состояние
  */
 protected void onChangeWorkstate(WorkstateEnum newWorkstate) {
   if (EDIT.equals(newWorkstate)) {
     resetEditableCard();
   }
   super.onChangeWorkstate(newWorkstate);
 }