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diff --git a/offapi/com/sun/star/form/runtime/XFeatureInvalidation.idl b/offapi/com/sun/star/form/runtime/XFeatureInvalidation.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_form_runtime_XFeatureInvalidation_idl__
+#define __com_sun_star_form_runtime_XFeatureInvalidation_idl__
+
+#include <com/sun/star/uno/XInterface.idl>
+
+
+module com { module sun { module star { module form { module runtime {
+
+
+/** implements a callback for a XFormOperations instance, which is called
+    when the state of one or more FormFeatures might have changed.
+
+    @see XFormOperations
+
+    @since OOo 2.2
+*/
+interface XFeatureInvalidation
+{
+    /** invalidates the given FormFeatures
+
+        <p>Invalidation means that any user interface representation (such as toolbox buttons), or
+        any dispatches associated with the features in question are potentially out-of-date, and
+        need to be updated.</p>
+
+        @param Features
+            The set of features whose state might have changed.
+    */
+    void    invalidateFeatures( [in] sequence< short > Features );
+
+    /** invalidates all features
+
+        <p>This method is used of it cannot be exactly and reliably determined
+        which features might actually have changed their state. In this case, the callee
+        should assume all features it is interested in must be required.</p>
+    */
+    void    invalidateAllFeatures();
+};
+
+
+}; }; }; }; };
+
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */