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diff --git a/src/corelib/itemmodels/qtransposeproxymodel.h b/src/corelib/itemmodels/qtransposeproxymodel.h
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+/****************************************************************************
+**
+** Copyright (C) 2018 Luca Beldi <v.ronin@yahoo.it>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** 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-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QTRANSPOSEPROXYMODEL_H
+#define QTRANSPOSEPROXYMODEL_H
+
+#include <QtCore/qabstractproxymodel.h>
+#include <QtCore/qscopedpointer.h>
+
+QT_BEGIN_NAMESPACE
+
+class QTransposeProxyModelPrivate;
+
+class Q_CORE_EXPORT QTransposeProxyModel : public QAbstractProxyModel
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(QTransposeProxyModel)
+    Q_DECLARE_PRIVATE(QTransposeProxyModel)
+public:
+    explicit QTransposeProxyModel(QObject* parent = nullptr);
+    ~QTransposeProxyModel();
+    void setSourceModel(QAbstractItemModel* newSourceModel) override;
+    int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+    int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
+    bool setHeaderData(int section, Qt::Orientation orientation, const QVariant &value, int role = Qt::EditRole) override;
+    bool setItemData(const QModelIndex &index, const QMap<int, QVariant> &roles) override;
+    QSize span(const QModelIndex &index) const override;
+    QMap<int, QVariant> itemData(const QModelIndex &index) const override;
+    QModelIndex mapFromSource(const QModelIndex &sourceIndex) const override;
+    QModelIndex mapToSource(const QModelIndex &proxyIndex) const override;
+    QModelIndex parent(const QModelIndex &index) const override;
+    QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
+    bool insertRows(int row, int count, const QModelIndex &parent = QModelIndex()) override;
+    bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex()) override;
+    bool moveRows(const QModelIndex &sourceParent, int sourceRow, int count, const QModelIndex &destinationParent, int destinationChild) override;
+    bool insertColumns(int column, int count, const QModelIndex &parent = QModelIndex()) override;
+    bool removeColumns(int column, int count, const QModelIndex &parent = QModelIndex()) override;
+    bool moveColumns(const QModelIndex &sourceParent, int sourceColumn, int count, const QModelIndex &destinationParent, int destinationChild) override;
+    void sort(int column, Qt::SortOrder order = Qt::AscendingOrder) override;
+protected:
+    QTransposeProxyModel(QTransposeProxyModelPrivate &, QObject *parent);
+};
+
+QT_END_NAMESPACE
+
+#endif // QTRANSPOSEPROXYMODEL_H