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diff --git a/reportdesign/source/ui/inc/IReportControllerObserver.hxx b/reportdesign/source/ui/inc/IReportControllerObserver.hxx
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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 INCLUDED_REPORTDESIGN_SOURCE_UI_INC_IREPORTCONTROLLEROBSERVER_HXX
+#define INCLUDED_REPORTDESIGN_SOURCE_UI_INC_IREPORTCONTROLLEROBSERVER_HXX
+
+#include <com/sun/star/beans/PropertyChangeEvent.hpp>
+
+namespace rptui
+{
+    /* abstract */ class IReportControllerObserver
+    {
+    protected:
+        // IReportControllerObserver(){}
+        virtual ~IReportControllerObserver() {}
+
+    public:
+
+        virtual void notifyPropertyChange( const css::beans::PropertyChangeEvent& _rEvent ) = 0;
+        virtual void notifyElementInserted( const css::uno::Reference< css::uno::XInterface >& _rxElement ) = 0;
+        virtual void handle( const css::uno::Reference< css::uno::XInterface >& _rxElement ) = 0;
+    };
+
+} // namespace rptui
+
+#endif
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */