docs: protected void clearEditor() {
  
          removeEditOverlays();
          CmsUndoRedoHandler.getInstance().clear();
          m_validationHandler.clear();
          m_entity = null;
          m_entityId = null;
          m_tabInfos = null;
          m_rootHandler = null;
          m_formPanel = null;
          m_formTabs = null;
      }