I'm TualatriX!

timeline = new Clutter.Timeline({fps:60, num_frames:30});

widget.events = Gdk.EventMask.all_events_mask;
description = widget.create_pango_context();

var update_url = function (web_view, web_frame, url_entry)
{
    url_entry.text = web_frame.get_uri();
}

browser_view.signal.load_commited.connect(update_url, entry);

HelloLabel = new GType({
    parent: Gtk.Label,
    name: "HelloLabel",
    instance_init: function(klass)
    {
        this.text = "Hello" // Hello labels always say hello.
    },
    class_init: function(klass, prototype)
    {
        // Add a say goodbye function to all instances.
        prototype.say_goodbye = function(){this.text = "Goodbye"};
        klass.install_signal({name: "say-hello"});
    }
});
/* Later */
label1 = new HelloLabel();
label1.signal.say_hello.emit();

try
{
    var file = Gio.file_new_for_path("/tmp");
    var fstream = file.replace();
}
catch (e)
{
    // e.name is equal to GIoError.
    // e.message is equal to "Error opening file '/tmp/': Is a directory
    // Also has source file/line number, as line and sourceURL properties
}