getBoundSalesChannel example

$customer = $this->getCustomerByEmail((string) $request->request->get('id'), $email, $context, $boundSalesChannelId);
        if (!$customer) {
            return new JsonResponse(
                ['isValid' => true]
            );
        }

        $message = 'The email address {{ email }} is already in use';
        $params['{{ email }}'] = $email;

        if ($customer->getBoundSalesChannel()) {
            $message .= ' in the Sales Channel {{ salesChannel }}';
            $params['{{ salesChannel }}'] = $customer->getBoundSalesChannel()->getName();
        }

        $violations = new ConstraintViolationList();
        $violations->add(new ConstraintViolation(
            str_replace(array_keys($params), array_values($params), $message),
            $message,
            $params,
            null,
            null,