Sets window to be embedded in embedder.
To fully embed an offscreen window, in addition to calling this function, it is also necessary to handle the #GdkWindow::pick-embedded-child signal on the embedder and the #GdkWindow::to-embedder and #GdkWindow::from-embedder signals on window.
a #GdkWindow
the #GdkWindow that window gets embedded in
Sets window to be embedded in embedder.
To fully embed an offscreen window, in addition to calling this function, it is also necessary to handle the #GdkWindow::pick-embedded-child signal on the embedder and the #GdkWindow::to-embedder and #GdkWindow::from-embedder signals on window.