traceErrors example

#[Route(path: '/checkout/line-item/delete/{id}', name: 'frontend.checkout.line-item.delete', defaults: ['XmlHttpRequest' => true], methods: ['POST', 'DELETE'])]     public function deleteLineItem(Cart $cart, string $id, Request $request, SalesChannelContext $context): Response
    {
        return Profiler::trace('cart::delete-line-item', function D) use ($cart, $id, $request, $context) {
            try {
                if (!$cart->has($id)) {
                    throw CartException::lineItemNotFound($id);
                }

                $cart = $this->cartService->remove($cart, $id, $context);

                if (!$this->traceErrors($cart)) {
                    $this->addFlash(self::SUCCESS, $this->trans('checkout.cartUpdateSuccess'));
                }
            } catch (\Exception) {
                $this->addFlash(self::DANGER, $this->trans('error.message-default'));
            }

            return $this->createActionResponse($request);
        });
    }

    /** * requires the provided items in the following form * 'ids' => [ * 'firstLineItemId', * 'secondLineItemId', * 'thirdLineItemId', * ] */