Is the dollar ($) object extensible?

Okay, after some time, here is how I ended up implementing new methods on the $ object.  I assign an immediately executed function to a new property on the $ object.  Then I can have a namespaced function methods I can call with $.

In a separate file, say "utils.jsx", from my main ExtendScript code, I've got something like this (just a basic form):

($.className = function () {
  this.defaults = { 
     prop1 : "apples",
     prop2 : "oranges",
     prop3 : "bananas"
  }
  this.firstMethod = function(words) {
     $.writeln("Now speaking: " + words);
  }
  return this;
}())

Then in my main ExtendScript code, I `#include` it, and begin to use the methods.  Something like this:

#include 'utils.jsx';
$.className.firstMethod("e pluribus unum"); //outputs to console: 'Now speaking: e pluribus unum'