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diff --git a/sources/pyside6/PySide6/QtUiTools/glue/plugins.h b/sources/pyside6/PySide6/QtUiTools/glue/plugins.h
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+++ b/sources/pyside6/PySide6/QtUiTools/glue/plugins.h
@@ -0,0 +1,67 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt for Python.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 _PLUGIN_H_
+#define _PLUGIN_H_
+
+#include "customwidgets.h"
+
+#include <QtCore/qpluginloader.h>
+
+static inline PyCustomWidgets *findPlugin()
+{
+    const auto &instances = QPluginLoader::staticInstances();
+    for (QObject *o : instances) {
+        if (auto plugin = qobject_cast<PyCustomWidgets *>(o))
+            return plugin;
+    }
+    return nullptr;
+}
+
+static void registerCustomWidget(PyObject *obj)
+{
+    static PyCustomWidgets *const plugin = findPlugin();
+
+    if (plugin)
+        plugin->registerWidgetType(obj);
+    else
+        qWarning("Qt for Python: Failed to find the static QUiLoader plugin.");
+}
+
+#endif