[Vala] How to call base constructors

[Adi Roiban <adi roiban ro>]

I'm trying to extend the Gtk.CheckMenuItem and unfortunately there are
no set_label or set_mnemonic methods.

I was thinking to call the base constructor, but instead of 
gtk_check_menu_item_new_with_label, vala generates
gtk_check_menu_item_construct_with_label

Do you know how can I call a base constructor?

Many thanks!

Here is my example:

public class ProjectMenuItem : Gtk.CheckMenuItem {
        public int id {set; get;}

        public ProjectMenuItem.with_label(string name) {
                base.with_label(name);
        }

        public ProjectMenuItem.with_mnemonic(string name) {
                base.with_mnemonic(name);
        }

}


-- 
Adi Roiban