public function _getWishlist()
    {
        $customerId = (int) $this->getRequest()->getParam('customer_id');
        if (!$customerId) {
            return [];
        }

        $customer = $this->customerFactory->create();
        $this->customerResource->load($customer, $customerId);
        if (! $customer->getId()) {
            return [];
        }

        return $this->wishlist->getWishlistsForCustomer($customerId);
    }