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diff --git a/udkapi/com/sun/star/lang/XUnoTunnel.idl b/udkapi/com/sun/star/lang/XUnoTunnel.idl
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+#ifndef __com_sun_star_lang_XUnoTunnel_idl__
+#define __com_sun_star_lang_XUnoTunnel_idl__
+
+#include <com/sun/star/uno/XInterface.idl>
+
+
+
+
+module com {  module sun {  module star {  module lang {
+
+
+/** An interface to tunnel UNO. This means providing access to data or
+    something else, which is not specified by UNO-IDL.
+
+    @attention
+    Restrictive usage.  Use only, if there is no better possibility left.
+    It is definitely a hack.
+
+    <p>
+    Common usage:
+    Getting a C++ object pointer in the same process, thus to use an
+    implementation directly, most often because of a design flaw.
+    </p>
+*/
+published interface XUnoTunnel: com::sun::star::uno::XInterface
+{
+    /** Call this method to get something which is not specified in UNO, e.g.
+        an address to some C++ object.
+
+        @attention
+        The identifier specifies how the return value is to be reinterpreted.
+        The identifier must be globally unique, because it is unknown where
+        the implementation resides.
+
+        @param aIdentifier
+               identifier
+        @return
+                something
+    */
+    hyper getSomething( [in] sequence< byte > aIdentifier );
+};
+
+
+}; }; }; };
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */