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diff --git a/src/Authoring/Qt3DStudio/Palettes/Inspector/VariantsTagModel.h b/src/Authoring/Qt3DStudio/Palettes/Inspector/VariantsTagModel.h
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+/****************************************************************************
+**
+** Copyright (C) 2019 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef VARIANTSTAGMODEL_H
+#define VARIANTSTAGMODEL_H
+
+#include <QtCore/qabstractitemmodel.h>
+
+class VariantsTagModel : public QAbstractListModel
+{
+    Q_OBJECT
+
+public:
+    explicit VariantsTagModel(const QVector<std::pair<QString, bool> > &data,
+                              QObject *parent = nullptr);
+
+    enum Roles {
+        TagRole = Qt::UserRole + 1,
+        SelectedRole,
+    };
+
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = TagRole) const override;
+
+    Qt::ItemFlags flags(const QModelIndex& index) const override;
+
+    void updateTagState(const QString &tag, bool selected);
+    QString serialize(const QString &groupName) const;
+
+protected:
+      QHash<int, QByteArray> roleNames() const override;
+
+private:
+      QVector<std::pair<QString, bool> > m_data; // [{tagName, selectedState}, ...]
+};
+
+#endif // VARIANTSTAGMODEL_H