extraBindings = super.valueForBinding("extraBindings"); return (NSDictionary)extraBindings;
extraBindings = (NSDictionary)super.valueForBinding("extraBindings"); return extraBindings;
    public NSDictionary extraBindings() {        if (extraBindings == null && !synchronizesVariablesWithBindings())            extraBindings = super.valueForBinding("extraBindings");        return (NSDictionary)extraBindings;    }