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diff --git a/chart2/source/inc/CloneHelper.hxx b/chart2/source/inc/CloneHelper.hxx
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+++ b/chart2/source/inc/CloneHelper.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/util/XCloneable.hpp>
+#include <rtl/ref.hxx>
+#include <algorithm>
+#include <iterator>
+#include <vector>
+
+namespace chart::CloneHelper
+{
+
+/// functor that clones a UNO-Reference
+template< class Interface >
+    struct CreateRefClone
+{
+    css::uno::Reference<Interface> operator() ( const css::uno::Reference<Interface> & xOther )
+    {
+        css::uno::Reference<Interface> xResult;
+        css::uno::Reference< css::util::XCloneable >
+              xCloneable( xOther, css::uno::UNO_QUERY );
+        if( xCloneable.is())
+            xResult.set( xCloneable->createClone(), css::uno::UNO_QUERY );
+
+        return xResult;
+    }
+};
+
+/// clones a vector of UNO-References
+template< class Interface >
+    void CloneRefVector(
+        const std::vector< css::uno::Reference< Interface > > & rSource,
+        std::vector< css::uno::Reference< Interface > > & rDestination )
+{
+    std::transform( rSource.begin(), rSource.end(),
+                      std::back_inserter( rDestination ),
+                      CreateRefClone< Interface >());
+}
+
+template< class T >
+    void CloneRefVector(
+        const std::vector< rtl::Reference< T > > & rSource,
+        std::vector< rtl::Reference< T > > & rDestination )
+{
+    for (const auto & rSourceItem : rSource)
+        rDestination.push_back(static_cast<T*>(rSourceItem->createClone().get()));
+}
+
+/// clones a UNO-sequence of UNO-References
+template< class Interface >
+    void CloneRefSequence(
+        const css::uno::Sequence< css::uno::Reference<Interface> > & rSource,
+        css::uno::Sequence< css::uno::Reference<Interface> > & rDestination )
+{
+    rDestination.realloc( rSource.getLength());
+    std::transform( rSource.begin(), rSource.end(),
+                      rDestination.getArray(),
+                      CreateRefClone< Interface >());
+}
+
+} //  namespace chart::CloneHelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */