public static ascx_Simple_Script_Editor script_Cassini(this API_Cassini api_Cassini, bool startHidden = false)
        {
            api_Cassini.url().assert_Not_Null()
            .uri().GET();

            var extraCode = @"
//using FluentSharp.CassiniDev
//O2Ref:FluentSharp.CassiniDev.dll
";

            return(api_Cassini.script_Me("cassini", startHidden)
                   .code_Append(extraCode));
        }