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diff --git a/src/Authoring/Qt3DStudio/Controls/ControlGraph.h b/src/Authoring/Qt3DStudio/Controls/ControlGraph.h
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+/****************************************************************************
+**
+** Copyright (C) 2002 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#pragma once
+#ifndef CONTROLGRAPHH
+#define CONTROLGRAPHH
+#include "Multicaster.h"
+#include "ControlGraphIterators.h"
+
+class CControl;
+class CControlWindowListener;
+class CChildFocusListener;
+class CRenderer;
+
+namespace Q3DStudio {
+namespace Graph {
+
+    struct SGraphPosition; // GraphPosition.h"
+}
+
+namespace Control {
+    class ControlData;
+
+    namespace ControlGraph {
+        void AddNode(std::shared_ptr<CControlData> inData);
+        void RemoveNode(CControl &inData);
+        void AddChild(CControl &inParent, CControl &inChild, CControl *inNextSibling);
+        // inParent is supplied for error checking purposes.
+        void RemoveChild(CControl &inParent, CControl &inChild);
+        void RemoveAllChildren(CControl &inParent);
+        void MoveTo(CControl &inParent, CControl &inChild, const Graph::SGraphPosition &inPosition);
+        long GetNumChildren(CControl &inControl);
+        long GetChildIndex(CControl &inParent, CControl &inChild);
+        std::shared_ptr<CControlData> GetChild(CControl &inParent, long inIndex);
+        std::shared_ptr<CControlData> GetParent(CControl &inControl);
+
+        SReverseIterator GetRChildren(CControl &inControl);
+        SIterator GetChildren(CControl &inControl);
+    };
+}
+}
+
+#endif