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diff --git a/src/libs/installer/lib7z_create.h b/src/libs/installer/lib7z_create.h
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+++ b/src/libs/installer/lib7z_create.h
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+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: http://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 LIB7Z_CREATE_H
+#define LIB7Z_CREATE_H
+
+#include "installer_global.h"
+
+#include <Common/MyCom.h>
+#include <7zip/UI/Common/Update.h>
+
+QT_BEGIN_NAMESPACE
+class QFileDevice;
+class QStringList;
+QT_END_NAMESPACE
+
+namespace Lib7z
+{
+    enum struct QTmpFile {
+        No,
+        Yes
+    };
+
+    enum struct Compression {
+        Non = 0,
+        Fastest = 1,
+        Fast = 3,
+        Normal = 5,
+        Maximum = 7,
+        Ultra = 9
+    };
+
+    class INSTALLER_EXPORT UpdateCallback : public IUpdateCallbackUI2, public CMyUnknownImp
+    {
+        Q_DISABLE_COPY(UpdateCallback)
+
+    public:
+        UpdateCallback() = default;
+        virtual ~UpdateCallback() {}
+
+        MY_UNKNOWN_IMP
+        INTERFACE_IUpdateCallbackUI2(;)
+    };
+
+    void INSTALLER_EXPORT createArchive(QFileDevice *archive, const QStringList &sources,
+        Compression level = Compression::Normal, UpdateCallback *callback = 0);
+    void INSTALLER_EXPORT createArchive(const QString &archive, const QStringList &sources,
+        QTmpFile mode, Compression level = Compression::Normal, UpdateCallback *callback = 0);
+
+} // namespace Lib7z
+
+#endif // LIB7Z_CREATE_H