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diff --git a/slideshow/source/engine/animationnodes/sequentialtimecontainer.hxx b/slideshow/source/engine/animationnodes/sequentialtimecontainer.hxx
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+++ b/slideshow/source/engine/animationnodes/sequentialtimecontainer.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_SLIDESHOW_SOURCE_ENGINE_ANIMATIONNODES_SEQUENTIALTIMECONTAINER_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_ANIMATIONNODES_SEQUENTIALTIMECONTAINER_HXX
+
+#include <basecontainernode.hxx>
+
+namespace slideshow::internal {
+
+/** This class implements sequential node containers
+
+    All children of this node are played sequentially
+*/
+class SequentialTimeContainer : public BaseContainerNode
+{
+public:
+    SequentialTimeContainer(
+        css::uno::Reference<css::animations::XAnimationNode> const& xNode,
+        BaseContainerNodeSharedPtr const& pParent,
+        NodeContext const& rContext )
+        : BaseContainerNode( xNode, pParent, rContext ) {}
+
+#if defined(DBG_UTIL)
+    virtual const char* getDescription() const override
+        { return "SequentialTimeContainer"; }
+#endif
+
+protected:
+    virtual void dispose() override;
+
+private:
+    virtual void activate_st() override;
+    virtual void notifyDeactivating( AnimationNodeSharedPtr const& rNotifier ) override;
+
+    void skipEffect( AnimationNodeSharedPtr const& pChildNode );
+
+private:
+    bool resolveChild( AnimationNodeSharedPtr const& pChildNode );
+
+    EventSharedPtr mpCurrentSkipEvent;
+};
+
+} // namespace slideshow::internal
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_ANIMATIONNODES_SEQUENTIALTIMECONTAINER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */