async.after can't trigger after ajax successed

[NoahZhang]

In your example async_base is this function

 function () {
      jQuery.get('http://example.com/comedians/jseinfeld.json', {}, function (data) {
        this.name = data.name;
        this.occupation = data.occupation;
      });
    }

Call this function use

async_base.apply(this, argv.concat(decorated_callback));

async_base can't receive parameter. Where is invoke decorated_callback?