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diff --git a/chart2/source/inc/ChartModelHelper.hxx b/chart2/source/inc/ChartModelHelper.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 .
+ */
+#pragma once
+
+#include <com/sun/star/awt/Size.hpp>
+#include "charttoolsdllapi.hxx"
+#include <rtl/ref.hxx>
+
+#include <vector>
+
+namespace chart { class ChartModel; }
+namespace com::sun::star::chart2 { class XChartDocument; }
+namespace com::sun::star::chart2 { class XChartType; }
+namespace com::sun::star::chart2 { class XCoordinateSystem; }
+namespace com::sun::star::chart2 { class XDataSeries; }
+namespace com::sun::star::chart2 { class XDiagram; }
+namespace com::sun::star::chart2::data { class XDataProvider; }
+namespace com::sun::star::chart2::data { class XRangeHighlighter; }
+namespace com::sun::star::frame { class XModel; }
+namespace com::sun::star::view { class XSelectionSupplier; }
+
+namespace chart
+{
+class BaseCoordinateSystem;
+class ChartType;
+class DataSeries;
+class Diagram;
+class InternalDataProvider;
+
+class OOO_DLLPUBLIC_CHARTTOOLS ChartModelHelper
+{
+public:
+    static rtl::Reference< InternalDataProvider > createInternalDataProvider(
+            const rtl::Reference<::chart::ChartModel>& xChartDoc, bool bConnectToModel );
+
+    static rtl::Reference< ::chart::BaseCoordinateSystem >
+        getFirstCoordinateSystem( const rtl::Reference<::chart::ChartModel>& xModel );
+
+    static std::vector< rtl::Reference< ::chart::DataSeries > >
+            getDataSeries( const rtl::Reference< ::chart::ChartModel > & xModel );
+
+    static rtl::Reference< ChartType >
+        getChartTypeOfSeries(
+            const rtl::Reference<::chart::ChartModel>& xModel
+            , const rtl::Reference< ::chart::DataSeries >& xGivenDataSeries );
+
+    static css::awt::Size getDefaultPageSize();
+
+    static css::awt::Size getPageSize( const rtl::Reference<::chart::ChartModel>& xModel );
+
+    static void triggerRangeHighlighting( const rtl::Reference<::chart::ChartModel>& xModel );
+
+    static bool isIncludeHiddenCells( const rtl::Reference<::chart::ChartModel>& xChartModel );
+
+    static bool setIncludeHiddenCells( bool bIncludeHiddenCells, ChartModel& rModel);
+
+};
+
+} //namespace chart
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */