public function toPKIRequestString()
{
return RequestStringBuilder::create()->append("id", $this->getId())->appendPrice("price", $this->getPrice())->append("name", $this->getName())->append("category1", $this->getCategory1())->append("category2", $this->getCategory2())->append("itemType", $this->getItemType())->append("subMerchantKey", $this->getSubMerchantKey())->appendPrice("subMerchantPrice", $this->getSubMerchantPrice())->getRequestString();
}