/** * Gets Json String of Object BillingInfo * @return string */ public static function getJson() { return '{"email":"TestSample","first_name":"TestSample","last_name":"TestSample","business_name":"TestSample","address":' . InvoiceAddressTest::getJson() . ',"language":"TestSample","additional_info":"TestSample","notification_channel":"TestSample","phone":' . PhoneTest::getJson() . '}'; }