In Visual Studio 2012 RC, how does one debug javascript IntelliSense extensions?

Question

The MSDN documentation describes ways in which to extend the JavaScript IntelliSense for Visual Studio 2012 RC. Is there a way to debug, or at least log to some output, any custom extension work?

Answer 1

Ha just found output logging at least by exploration.

if(intellisense) {
    intellisense.logMessage("hi!");
}

This will write output to "JavaScript Language Service" in output window.

Now about debugging? :)