Api\StructType\ApiAddressDelivery_Type::setPostalCode PHP Method

    public function setPostalCode($postalCode = null)
    {
        // validation for constraint: length
        if (is_scalar($postalCode) && strlen($postalCode) !== 4 || is_array($postalCode) && count($postalCode) !== 4) {
            throw new \InvalidArgumentException('Invalid length, please provide an array with 4 element(s) or a scalar of 4 character(s)', __LINE__);
        }
        // validation for constraint: string
        if (!is_null($postalCode) && !is_string($postalCode)) {
            throw new \InvalidArgumentException(sprintf('Invalid value, please provide a string, "%s" given', gettype($postalCode)), __LINE__);
        }
        $this->PostalCode = $postalCode;
        return $this;
    }