resetMenus = () => {
  Object.keys(Menus).forEach(key => {
    delete Menus[key];
  });
  Menus[defaultMenuGroup] = {};
}
Menu configuration is a map
{
 defaultMenu: {
   item1: {
     ...
 }
 adminMenu: {
   some-item: {
     ...
   }
 }
 shortMenu: { ... }
 ...
}