jQuery.extend default action with only one input
<p>Given:</p>

<pre><code>jQuery.extend({
  fooBar: function(){ return 'baz'; }
});
</code></pre>

<p>does it modify the base jQuery object?
so afterwards you can call <code>jQuery.fooBar(); // 'baz'</code></p>

<p>There's nothing in the documentation, but that's what the source does as far as I can tell.</p>
