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diff --git a/src/qdoc/utilities.cpp b/src/qdoc/utilities.cpp
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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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "utilities.h"
+#include "loggingcategory.h"
+
+/*!
+    \namespace Utilities
+    \internal
+    \brief This namespace holds QDoc-internal utility methods.
+ */
+namespace Utilities {
+    static inline void setDebugEnabled(bool value)
+    {
+        const_cast<QLoggingCategory &>(lcQdoc()).setEnabled(QtDebugMsg, value);
+    }
+
+    void startDebugging(const QString &message)
+    {
+        setDebugEnabled(true);
+        qCDebug(lcQdoc, "START DEBUGGING: %ls", qUtf16Printable(message));
+    }
+
+    void stopDebugging(const QString &message)
+    {
+        qCDebug(lcQdoc, "STOP DEBUGGING: %ls", qUtf16Printable(message));
+        setDebugEnabled(false);
+    }
+
+    bool debugging()
+    {
+        return lcQdoc().isEnabled(QtDebugMsg);
+    }
+}