OB.UTIL.HookManager.registerHook('OBPOS_PostAddProductToOrder', function(args, c) {
    var order = args.receipt;
    if(!order.get('lines').__proto__.comparator){
        order.get('lines').__proto__.comparator = function(line){
            return -line.get('product').get('originalStandardPrice');
      };
    }
    order.get('lines').sort();
    OB.UTIL.HookManager.callbackExecutor(args, c);
});