AX2012 - - SysTest::hasMethod

public void initFromListPage()
{
    Object          caller;
    SysSetupFormRun callerForm;
    Object          pageCaller;
    Args            _args;
    ;
    _args = element.args();

    if (_args)
    {
        caller = _args.caller();

        if (caller)
        {
            callerForm = caller;

            if (callerForm.name() == formStr(GAR_ActualShipmentplanHeaderListPage))
            {
                pageCaller = callerForm.pageInteraction();
                if(SysTest::hasMethod(pageCaller, identifierStr(shipmentType)))
                {
                    shipmentType = pageCaller.shipmentType();
                }
            }
        }
    }
}