gboolean gdk_toplevel_layout_get_fullscreen ( GdkToplevelLayout* layout, gboolean* fullscreen )
If the layout specifies whether to the toplevel should go fullscreen,
the value pointed to by
fullscreen is set to
TRUE if it should go
FALSE, if it should go unfullscreen.
Location to store whether the toplevel should be fullscreen.
The argument will be set by the function.