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diff --git a/src/curveeditor/detail/treeitem.h b/src/curveeditor/detail/treeitem.h
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+
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt Design Tooling
+**
+** 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.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "animationcurve.h"
+
+#include <QString>
+
+#include <vector>
+
+class QIcon;
+class QVariant;
+
+namespace DesignTools {
+
+class NodeTreeItem;
+class PropertyTreeItem;
+
+class TreeItem
+{
+public:
+    TreeItem(const QString &name);
+
+    virtual ~TreeItem();
+
+    virtual QIcon icon() const;
+
+    virtual NodeTreeItem *asNodeItem();
+
+    virtual PropertyTreeItem *asPropertyItem();
+
+    unsigned int id() const;
+
+    bool locked() const;
+
+    bool pinned() const;
+
+    int row() const;
+
+    int column() const;
+
+    int rowCount() const;
+
+    int columnCount() const;
+
+    TreeItem *parent() const;
+
+    TreeItem *child(int row) const;
+
+    TreeItem *find(unsigned int row) const;
+
+    QVariant data(int column) const;
+
+    QVariant headerData(int column) const;
+
+    void setId(unsigned int &id);
+
+    void addChild(TreeItem *child);
+
+    void setLocked(bool locked);
+
+    void setPinned(bool pinned);
+
+protected:
+    QString m_name;
+
+    unsigned int m_id;
+
+    bool m_locked;
+
+    bool m_pinned;
+
+    TreeItem *m_parent;
+
+    std::vector<TreeItem *> m_children;
+};
+
+} // End namespace DesignTools.