UnityEditor.PopupWindowWithoutFocus.OnDisable C# (CSharp) Method

        private void OnDisable()
        {
            s_LastClosedTime = EditorApplication.timeSinceStartup;
            if (this.m_WindowContent != null)
            {
                this.m_WindowContent.OnClose();
            }
            s_PopupWindowWithoutFocus = null;
        }