(function($) {
    "use strict";


    $.widget("myWidget", {
        options: {
            editable: new Date(),
            url: null,
            test: {
                a: 1,
                b: function() {
                }

            }
        },
        _create: function()
        {

        },
        _setOption: function(key, value)
        {
            this.options[key] = value;
            this._change();
        },
        _change: function()
        {

        }
    });
})(jQuery);


myWidget._change(); myWidget.options.test.b();