YUI AC with function as requestTemplate

gistfile1.js

// Y.IC.AutoComplete source: https://github.com/Wiggins/interchange_mvc/blob/master/share/ic/js/autocomplete.js

return new Y.IC.AutoComplete (
    {   
        inputNode:         input_node,
        queryDelay:        300,
        minQueryLength:    6,  
        resultListLocator: "results",
        source:            "/manage/LogisticsZoneServiceMaps/ac?_format=json&service_kind=delivery&",
        requestTemplate:   function (query) {
            var my_result = 'code=' + query;
            return my_result;
        }   
    }   
);  


// resulting url: /manage/LogisticsZoneServiceMaps/ac?_format=json&service_kind=delivery&code=code=NW8%209AY