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diff --git a/src/qdoc/qdocindexfiles.h b/src/qdoc/qdocindexfiles.h
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--- a/src/qdoc/qdocindexfiles.h
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-/****************************************************************************
-**
-** Copyright (C) 2019 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the tools applications of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:GPL-EXCEPT$
-** 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 QDOCINDEXFILES_H
-#define QDOCINDEXFILES_H
-
-#include "node.h"
-#include "tree.h"
-
-QT_BEGIN_NAMESPACE
-
-class Atom;
-class FunctionNode;
-class Generator;
-class QDocDatabase;
-class WebXMLGenerator;
-class QXmlStreamReader;
-class QXmlStreamWriter;
-class QXmlStreamAttributes;
-
-// A callback interface for extending index sections
-class IndexSectionWriter
-{
-public:
-    virtual ~IndexSectionWriter() {}
-    virtual void append(QXmlStreamWriter &writer, Node *node) = 0;
-};
-
-class QDocIndexFiles
-{
-    friend class QDocDatabase;
-    friend class WebXMLGenerator; // for using generateIndexSections()
-
-private:
-    static QDocIndexFiles *qdocIndexFiles();
-    static void destroyQDocIndexFiles();
-
-    QDocIndexFiles();
-    ~QDocIndexFiles();
-
-    void readIndexes(const QStringList &indexFiles);
-    void readIndexFile(const QString &path);
-    void readIndexSection(QXmlStreamReader &reader, Node *current, const QString &indexUrl);
-    void insertTarget(TargetRec::TargetType type, const QXmlStreamAttributes &attributes,
-                      Node *node);
-    void resolveIndex();
-
-    void generateIndex(const QString &fileName, const QString &url, const QString &title,
-                       Generator *g);
-    void generateFunctionSection(QXmlStreamWriter &writer, FunctionNode *fn);
-    void generateFunctionSections(QXmlStreamWriter &writer, Aggregate *aggregate);
-    bool generateIndexSection(QXmlStreamWriter &writer, Node *node,
-                              IndexSectionWriter *post = nullptr);
-    void generateIndexSections(QXmlStreamWriter &writer, Node *node,
-                               IndexSectionWriter *post = nullptr);
-
-private:
-    static QDocIndexFiles *qdocIndexFiles_;
-    QDocDatabase *qdb_;
-    Generator *gen_;
-    QString project_;
-    QList<QPair<ClassNode *, QString>> basesList_;
-    bool storeLocationInfo_;
-};
-
-QT_END_NAMESPACE
-
-#endif