Autocomplete: how to pass an extra parameter to the response callback
===

I was looking the following example [scottgonzalez / jquery-ui-extensions](https://github.com/scottgonzalez/jquery-ui-extensions/blob/master/autocomplete/jquery.ui.autocomplete.html.js)

I need to customise the `source callback`, which expects two argumnets `request` and `response` for the autocomplete.

My question is the following:
how can I pass an extra parameter to the source callback in order to filter the data according a variable defined in autocomplete?
Example: 

currentUser = false -> I need to exclude the currentUser from the source.

Here is my code (1) (2).    
Please see the comment to understand better what I am asking.    
Thanks.

---

(1)

    // autocomplte.js
    define([
       'jquery',
       'matcher'
    ], function ($, matcher) {
        "use strict";
        var autoComplete = function (element, options) {
            console.log(options);  // {isCurrentUser: true}
            element.autocomplete({
                minLength: 3,
                autoFocus: true,
                source: matcher // this is a callback defined 
                                // in matcher.js
            });
            // other codes;
         }
    });

---

(2)

    // matcher.js
    define([
        'jquery',
        'users',
        'jqueryUi'
    ], function ($, UserCollection) {
        "use strict";
    
        var userCollection,
            matcher;
    
        matcher = function (request, response, options) { // how can I pass 
                                                          // an extra parameter 
                                                          // to this callback?
            console.log(options); // undefined it should be {isCurrentUser: true}
            userCollection = new UserCollection();
            var regExp = new RegExp($.ui.autocomplete.escapeRegex(request.term), 'i');
            response(userCollection.filter(function (data) {
                return regExp.test(data.get('first_name'));
            }));
        };
    
        return matcher;
    });


