Api\StructType\ApiItem::setItemType PHP Method

    public function setItemType($itemType = null)
    {
        // validation for constraint: enumeration
        if (!\Api\EnumType\ApiItemType::valueIsValid($itemType)) {
            throw new \InvalidArgumentException(sprintf('Value "%s" is invalid, please use one of: %s', $itemType, implode(', ', \Api\EnumType\ApiItemType::getValidValues())), __LINE__);
        }
        $this->itemType = $itemType;
        return $this;
    }