Testing Read service in X++

static void TestingService(Args _args)
{
    PurchPurchReqService     customerService;            // Customer Service class
    CustCustomer            customer;                   // Customer Document object
    PurchPurchReq            customerRead;               // Customer Document object
    CustCustomer_CustTable  custTable;                  // CustTable data object
    CustCustomer_CustTable  custTableRead;              // CustTable data object
    AifEntityKeyList        entityKeyList;              // Entity key list
    AifEntityKeyList        entityKeyListFind;          // Entity key list
    AifQueryCriteria        queryCriteria;
    AifCriteriaElement      criteriaElement;
    AccountNum              accountNum;




    // Create the service instance
    customerService =  PurchPurchReqService::construct();


    queryCriteria = new AifQueryCriteria();
    criteriaElement = AifCriteriaElement::newCriteriaElement('VendPurchOrderJour', 'PurchId', AifCriteriaOperator::Equal, 'US1PO0000440');
    queryCriteria.addCriteriaElement(criteriaElement);
    entityKeyListFind = customerService.findKeys(queryCriteria);


    // Read Customer using returned entity key
    customerRead = customerService.read(entityKeyListFind);
    info(customerRead.serialize());
    //custTableRead = customerRead.parmCustTable().get_Item(0);
    //info(strfmt("Read customer: Account Number: %1, Name: %2.", custTableRead.parmAccountNum(), custTableRead.parmName()));





}