How is intellisense resolving $.connection ?

Hello,

this is probably more a javascript/jquery question but I was wondering how is VS intellisense resolving "$.connection" to the following js function?

    signalR = function (url, qs, logging) {
        /// <summary>Creates a new SignalR connection for the given url</summary>
        /// <param name="url" type="String">The URL of the long polling endpoint</param>
        /// <param name="qs" type="Object">
        ///     [Optional] Custom querystring parameters to add to the connection URL.
        ///     If an object, every non-function member will be added to the querystring.
        ///     If a string, it's added to the QS as specified.
        /// </param>
        /// <param name="logging" type="Boolean">
        ///     [Optional] A flag indicating whether connection logging is enabled to the browser
        ///     console/log. Defaults to false.
        /// </param>

        return new signalR.fn.init(url, qs, logging);
    };

Thx
Steve