public override void Map(Routing.Route route, IContainer container)
        {
            route.ThrowIfNull("route");
            container.ThrowIfNull("container");

            if (_fieldComparer != null && _valueComparer != null)
            {
                route.RestrictByUrlQueryString(_field, GetComparer(_fieldComparer.Value), _value, GetComparer(_valueComparer.Value), _optional);
            }
            else
            {
                route.RestrictByUrlQueryString(_field, _value, _optional);
            }
        }