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diff --git a/src/libs/installer/componentsortfilterproxymodel.h b/src/libs/installer/componentsortfilterproxymodel.h
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+++ b/src/libs/installer/componentsortfilterproxymodel.h
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+/**************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt Installer Framework.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** 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 COMPONENTSORTFILTERPROXYMODEL_H
+#define COMPONENTSORTFILTERPROXYMODEL_H
+
+#include "installer_global.h"
+
+#include <QSortFilterProxyModel>
+
+namespace QInstaller {
+
+class INSTALLER_EXPORT ComponentSortFilterProxyModel : public QSortFilterProxyModel
+{
+    Q_OBJECT
+
+public:
+    enum AcceptType {
+        Direct,
+        Descendant,
+        Rejected
+    };
+
+    explicit ComponentSortFilterProxyModel(QObject *parent = nullptr);
+
+    QVector<QModelIndex> directlyAcceptedIndexes() const;
+
+protected:
+    bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const Q_DECL_OVERRIDE;
+
+private:
+    bool acceptsRow(int sourceRow, const QModelIndex &sourceParent, AcceptType *type = nullptr) const;
+    bool findDirectlyAcceptedIndexes(const QModelIndex &in, QVector<QModelIndex> &indexes) const;
+};
+
+} // namespace QInstaller
+
+#endif // COMPONENTSORTFILTERPROXYMODEL_H