Gtk.Container.prototype.forall

function forall(callback:Gtk.Callback):void {
    // Gjs wrapper for gtk_container_forall()
}

Invokes callback on each child of container, including children that are considered "internal" (implementation details of the container). "Internal" children generally weren't added by the user of the container, but were added by the container implementation itself. Most applications should use Gtk.foreach, rather than Gtk.Container.prototype.forall.