/**
* Gets Json String of Object InvoiceItem
* @return string
*/
public static function getJson()
{
return '{"name":"TestSample","description":"TestSample","quantity":"12.34","unit_price":' . CurrencyTest::getJson() . ',"tax":' . TaxTest::getJson() . ',"date":"TestSample","discount":' . CostTest::getJson() . '}';
}