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diff --git a/src/Authoring/Studio/Palettes/Inspector/VariantsGroupModel.h b/src/Authoring/Studio/Palettes/Inspector/VariantsGroupModel.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 VARIANTSGROUPMODEL_H
+#define VARIANTSGROUPMODEL_H
+
+#include <QtCore/qabstractitemmodel.h>
+
+class VariantsTagModel;
+
+class VariantsGroupModel : public QAbstractListModel
+{
+    Q_OBJECT
+
+public:
+    explicit VariantsGroupModel(QObject *parent = nullptr);
+
+    enum Roles {
+        GroupTitleRole = Qt::UserRole + 1,
+        GroupColorRole,
+        TagRole
+    };
+
+    struct TagGroupData
+    {
+        QString m_title;
+        QString m_color;
+        VariantsTagModel *m_tagsModel = nullptr;
+    };
+
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant data(const QModelIndex &index, int role = GroupTitleRole) const override;
+
+    Qt::ItemFlags flags(const QModelIndex& index) const override;
+
+    void refresh();
+
+    Q_INVOKABLE void setTagState(const QString &group, const QString &tag, bool selected);
+    Q_INVOKABLE void addNewTag(const QString &group);
+    Q_INVOKABLE void addNewGroup();
+
+
+protected:
+      QHash<int, QByteArray> roleNames() const override;
+
+private:
+      QVector<TagGroupData> m_data;
+      int m_instance = 0; // selected layer instance
+      int m_property = 0; // variant tags property handler
+};
+
+#endif // VARIANTSGROUPMODEL_H