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diff --git a/offapi/com/sun/star/form/validation/XValidityConstraintListener.idl b/offapi/com/sun/star/form/validation/XValidityConstraintListener.idl
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+++ b/offapi/com/sun/star/form/validation/XValidityConstraintListener.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_validation_XValidityConstraintListener_idl__
+#define __com_sun_star_form_validation_XValidityConstraintListener_idl__
+
+#include <com/sun/star/lang/XEventListener.idl>
+
+
+module com {  module sun {  module star {  module form { module validation {
+
+
+/** specifies an interface for listening for changes in the validity constraints
+    represented by an XValidator.
+*/
+interface XValidityConstraintListener : com::sun::star::lang::XEventListener
+{
+    /** called when the validity constraint represented by an XValidator,
+        at which the listener is registered, changed.
+
+    @param Source
+        The event source. The member com::sun::star::lang::EventObject::Source
+        represents the validator component whose validity constraint changed.
+    */
+    void    validityConstraintChanged( [in] com::sun::star::lang::EventObject Source );
+};
+
+
+}; }; }; }; };
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */