The document QtWebengine is self-contradictory

Hi guys,

   The document of when to call function QtWebengine::initialize() is self-contradictory.

Here the demo code shows that , QtWebengine::initialize() should call after QApplication is created.

https://doc.qt.io/qt-5/qtwebengine-overview.html 

// code placeholder
int main(int argc, char **argv)
{
    QApplication app(argc, argv);

    QtWebEngine::initialize();

    QMainWindow window;
    window.show();

    return app.exec();
}

But here , the document says that , QtWebengine::initialize()  should call before QGuiApplication is created. 

https://doc.qt.io/qt-5/qtwebengine.html

"Sets up an OpenGL Context that can be shared between threads. This has to be done before QGuiApplication is created and before window's QPlatformOpenGLContext is created."