void ReverseDisableOthers(IPopUp enablingPopUp)
        {
            IPopUp parentPopUp = enablingPopUp.GetParentPopUp();

            if (parentPopUp != null)
            {
                parentPopUp.ReversePopUpDisableRecursively();
                RegisterPopUp(parentPopUp);
            }
            else
            {
                thisRootUIElement.ReversePopUpDisableRecursively();
                ClearActivePopUp();
            }
        }