public override void ClearUI()
        {
            if (m_UssPreview == null)
            {
                return;
            }

            var selection = document.primaryViewportWindow?.selection;

            if (selection == null)
            {
                return;
            }

            selection.RemoveNotifier(m_UssPreview);

            m_UssPreview.RemoveFromHierarchy();
            m_UssPreview = null;
        }