setSuccess example

    protected function subscribe(RequestDataBag $dataBag, CustomerEntity $customer, SalesChannelContext $context, NewsletterAccountPagelet $newsletterAccountPagelet): NewsletterAccountPagelet
    {
        try {
            $this->newsletterSubscribeRoute->subscribe(
                $this->hydrateFromCustomer($dataBag, $customer),
                $context,
                false
            );

            $newsletterAccountPagelet->setSuccess(true);
            if ($newsletterAccountPagelet->isNewsletterDoi()) {
                $text = $this->translator->trans('newsletter.subscriptionPersistedSuccess');
            } else {
                $text = $this->translator->trans('newsletter.subscriptionConfirmationSuccess');
            }
            $newsletterAccountPagelet->setMessages(
                [
                    [
                        'type' => 'success',
                        'text' => $text,
                    ],
                ]

$this->hook(new AddressBookWidgetLoadedHook($page, $context));
            $viewData->setPage($page);

            $this->handleChangeableAddresses($viewData, $dataBag, $context, $customer);
            $this->handleAddressCreation($viewData, $dataBag, $context, $customer);
            $this->handleAddressSelection($viewData, $dataBag, $context, $customer);
            $this->handleCustomerVatIds($dataBag, $context, $customer);
        } catch (ConstraintViolationException $formViolations) {
            $params['formViolations'] = $formViolations;
            $params['postedData'] = $dataBag->get('address');
        } catch (\Exception) {
            $viewData->setSuccess(false);
            $viewData->setMessages([
                'type' => self::DANGER,
                'text' => $this->trans('error.message-default'),
            ]);
        }

        if ($request->get('redirectTo') || $request->get('forwardTo')) {
            return $this->createActionResponse($request);
        }
        $params = array_merge($params, $viewData->getVars());