getCheckPostalCodePattern example

if ($country->getPostalCodeRequired()) {
            if ($value === null || $value === '') {
                $this->context->buildViolation($constraint->getMessageRequired())
                    ->setCode(NotBlank::IS_BLANK_ERROR)
                    ->addViolation();

                return;
            }
        }

        if (!$country->getCheckPostalCodePattern() && !$country->getCheckAdvancedPostalCodePattern()) {
            return;
        }

        $pattern = $country->getDefaultPostalCodePattern();

        if ($country->getCheckAdvancedPostalCodePattern()) {
            $pattern = $country->getAdvancedPostalCodePattern();
        }

        if ($pattern === null) {
            return;
        }