setWishlist example

    public function load(Request $request, SalesChannelContext $context, CustomerEntity $customer): WishlistPage
    {
        $criteria = $this->createCriteria($request);
        $this->eventDispatcher->dispatch(new WishListPageProductCriteriaEvent($criteria, $context, $request));

        $page = $this->genericLoader->load($request, $context);
        $page = WishlistPage::createFrom($page);

        try {
            $page->setWishlist($this->wishlistLoadRoute->load($request, $context, $criteria, $customer));
        } catch (CustomerWishlistNotFoundException) {
            $page->setWishlist(
                new LoadWishlistRouteResponse(
                    new CustomerWishlistEntity(),
                    new EntitySearchResult(
                        'wishlist',
                        0,
                        new ProductCollection(),
                        null,
                        $criteria,
                        $context->getContext()
                    )