CheckoutRegisterPageLoadedEvent example

$page->setCountries($this->getCountries($salesChannelContext));
        $page->setCart($this->cartService->getCart($salesChannelContext->getToken(), $salesChannelContext));
        $page->setSalutations($this->getSalutations($salesChannelContext));

        $addressId = $request->attributes->get('addressId');
        if ($addressId) {
            $address = $this->getById((string) $addressId, $salesChannelContext);
            $page->setAddress($address);
        }

        $this->eventDispatcher->dispatch(
            new CheckoutRegisterPageLoadedEvent($page, $salesChannelContext, $request)
        );

        return $page;
    }

    private function getById(string $addressId, SalesChannelContext $context): CustomerAddressEntity
    {
        if (!Uuid::isValid($addressId)) {
            throw new InvalidUuidException($addressId);
        }