public void billingNotSupported(string Message)
        {
            IAB_IsInited = true;
            IABInitResult initResult = new IABInitResult();

            initResult.Message = Message;
            initResult.Status  = CoreInitStatus.Failed;
            RemoveCallback("billingSupported");
            ExecuteCallBack("billingNotSupported", initResult);
        }
        public void billingSupported()
        {
            IAB_IsInited = true;
            IABInitResult initResult = new IABInitResult();

            initResult.Status  = CoreInitStatus.Success;
            initResult.Message = "Success";
            RemoveCallback("billingNotSupported");
            ExecuteCallBack("billingSupported", initResult);
        }