namespace Windows.UI.Text
{
    [ContractVersion(typeof(UniversalApiContract), 262144U)]
    [ProjectedRuntimeClass(typeof(ITextDocument))]
    [SupportedOSPlatform("Windows10.0.15063.0")]
    [WindowsRuntimeHelperType(typeof(RichEditTextDocument))]
    [WindowsRuntimeType("Windows.Foundation.UniversalApiContract")]
    public sealed class RichEditTextDocument : IEquatable<RichEditTextDocument>, ICustomQueryInterface, IDynamicInterfaceCastable, IUnmanagedVirtualMethodTableProvider, ITextDocument, IWinRTObject
    {
        public void BeginUndoGroup();
    }
}