getAdditionalRegisterValidationDefinitions example

if ($data->getBoolean('createCustomerAccount')) {
                $data->set('guest', false);
            } else {
                $data->set('guest', true);
            }

            $this->registerRoute->register(
                $data->toRequestDataBag(),
                $context,
                false,
                $this->getAdditionalRegisterValidationDefinitions($data, $context)
            );
        } catch (ConstraintViolationException $formViolations) {
            if (!$request->request->has('errorRoute')) {
                throw RoutingException::missingRequestParameter('errorRoute');
            }

            if (empty($request->request->get('errorRoute'))) {
                $request->request->set('errorRoute', 'frontend.account.register.page');
            }

            $params = $this->decodeParam($request, 'errorParameters');