Webiny\Component\Validation\Validators\EuCountry::validate PHP Method

    public function validate($value, $params = [], $throw = false)
    {
        $message = 'Given value is not an EU country.';
        $euCountries = ['AT', 'BE', 'BG', 'HR', 'CY', 'CZ', 'DK', 'EE', 'FI', 'FR', 'DE', 'GR', 'HU', 'IE', 'IT', 'LV', 'LT', 'LU', 'MT', 'NL', 'PL', 'PT', 'RO', 'SK', 'SI', 'ES', 'SE', 'GB'];
        if (in_array($value, $euCountries)) {
            return true;
        }
        if ($throw) {
            throw new ValidationException($message);
        }
        return $message;
    }