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diff --git a/src/virtualkeyboard/qvirtualkeyboardextensionplugin.cpp b/src/virtualkeyboard/qvirtualkeyboardextensionplugin.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt Virtual Keyboard module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** 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 or (at your option) 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.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-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QVirtualKeyboardExtensionPlugin>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QVirtualKeyboardExtensionPlugin
+    \inmodule QtVirtualKeyboard
+    \brief Extension plugin for the Qt Virtual Keyboard.
+
+    Extension plugin allows customizing and extending the Qt Virtual Keyboard
+    functionality. Extension plugin can provide additional keyboard layouts and
+    input methods.
+
+    Virtual keyboard loads all the extension plugins at startup. It searches for
+    \c plugins/virtualkeyboard directory and matches the metadata found in the
+    plugin. If there are two or more extension plugins with the same \c Name, it
+    loads the one with the highest \c Version number.
+
+    \sa {Virtual Keyboard Extension Plugin}
+*/
+
+QVirtualKeyboardExtensionPlugin::~QVirtualKeyboardExtensionPlugin()
+{
+}
+
+/*!
+    If the plugin metadata contains \c InputMethod field defining an input method
+    name, Qt Virtual Keyboard will call registerTypes() for registering the input
+    method as QML type. The type must be registered with a \a uri if the input method
+    is used by the default keyboard layouts. If the input method type is only used in
+    private layouts (known only by the plugin), the uri can be omitted and chosen
+    freely.
+*/
+void QVirtualKeyboardExtensionPlugin::registerTypes(const char *uri) const
+{
+    Q_UNUSED(uri)
+}
+
+QT_END_NAMESPACE