title: Can QOpenGLWidget be integrated with third party OpenGL library?
body: <p>Legacy <code>QGLWidget</code> could be integrated with rendering libraries (like SFML) by passing <code>winId()</code> result to the rendering library. But I can't make <code>QOpenGLWidget</code> work that way. After making it <code>MainWindow</code>'s central widget I get series of warnings like <code>QOpenGLWidget cannot be used as a native child widget. Consider setting Qt::AA_DontCreateNativeWidgetAncestors and Siblings.</code>. Furthermore, the documentation says "QGLWidget on the other hand uses a native window and surface. (...) QOpenGLWidget avoids this by not creating a separate native window.". Can <code>QOpenGLWidget</code> be integrated with third party OpenGL software at all, or is it unsupported now?</p>