pub unsafe extern "C" fn gdk_wayland_toplevel_export_handle(
toplevel: *mut GdkWaylandToplevel,
callback: GdkWaylandToplevelExported,
user_data: gpointer,
destroy_func: GDestroyNotify
) -> gboolean
pub unsafe extern "C" fn gdk_wayland_toplevel_export_handle(
toplevel: *mut GdkWaylandToplevel,
callback: GdkWaylandToplevelExported,
user_data: gpointer,
destroy_func: GDestroyNotify
) -> gboolean