gtk_widget_set_double_buffered() is deprecated, so what can replace it?

[Lance Arsenault <lance arsenault gmail com>]

Hello GTK developer,

I've read the latest docs, looked at the latest (git) GTK+3 code, and 
searched the archives, and found not direct answer to this question:

1.  Is there a method, that is not deprecated, that can give the effect 
of gtk_widget_set_double_buffered() for GTK3?

There are a lot of apps that must use the underlying/native drawing APIs 
like libX11 and OpenGL to draw to a X11 window that is within a GTK+3.0 
app.  It is very clear that drawing to, or transferring content to, a 
Cairo surface is far too slow for apps that render real-time animations 
in an X11 window.   Many apps must use X11 and/or OpenGL, and GTK+3.0 
together, so what's the new hook that will stop GTK from using Cairo 
surface double buffering in a GTK+ drawing area.

cheers
lance