namespace System.Web.UI.Design
{
    [Obsolete("The recommended alternative is System.Web.UI.Design.WebFormsRootDesigner. The WebFormsRootDesigner contains additional functionality and allows for more extensibility. To get the WebFormsRootDesigner use the RootDesigner property from your ControlDesigner. http://go.microsoft.com/fwlink/?linkid=14202")]
    public interface IWebFormsDocumentService
    {
        void DiscardUndoUnit(object discardableUndoUnit);
    }
}