What happened to the jQuery "contains" traversal method?
<p>A follow-up to the comment I just posted <a href="http://stackoverflow.com/questions/971477/jquery-error-a-function-is-not-a-function/971522#971522">here</a>... I ran this in Firebug:</p>

<pre><code>var l = []; for(f in $('div')){l.push(f);}; l.sort(); alert(l.join("\n"));
</code></pre>

<p>just to make sure I wasn't going crazy, and "contains" is not, in fact, a method of the jQuery wrapped set.  But the <a href="http://docs.jquery.com/Traversing/contains" rel="nofollow">jquery docs page</a> says it is.  What gives?  Was there a "contains" method that got deprecated?  Is it new, and the version I'm testing with (1.2.1) doesn't have it yet?  Is there a better way to find this information than asking on SO?</p>
