public static function getJson()
{
return '{"sku":"TestSample","name":"TestSample","description":"TestSample","quantity":"12.34","price":"12.34","currency":"TestSample","tax":"12.34","url":"http://www.google.com","category":"TestSample","weight":' . MeasurementTest::getJson() . ',"length":' . MeasurementTest::getJson() . ',"height":' . MeasurementTest::getJson() . ',"width":' . MeasurementTest::getJson() . ',"supplementary_data":' . NameValuePairTest::getJson() . ',"postback_data":' . NameValuePairTest::getJson() . '}';
}