Actually, we did not find a way to find the ItemContainer object. It is not displayed in the OB and cannot be located from script. However, we succeeded to find the buttons in the container. We used the Text property to locate the buttons.
Please note that for our sample application, the child objects of the target ItemContainer control are displayed in the OB. If the behavior is different on your side, please send us a sample application demonstrating the issue. Also, please send us your project. You can get in touch with us via the Contact Support web form.