@Override
    public void onBeforeContextMenu(CefBrowser browser, CefFrame frame, CefContextMenuParams params, CefMenuModel model) {
      if (isProperty(Properties.NO_CONTEXT_MENU)) {
        model.clear();
        return;
      }
      if (isOpenDevToolsItemEnabled) {
        model.addItem(DEBUG_COMMAND_ID, "Open DevTools");
      }
    }
@Override
    public void onBeforeContextMenu(CefBrowser browser, CefFrame frame, CefContextMenuParams params, CefMenuModel model)