Preparation code

<div class="foobar">
  <div class="foobar1">
    <div class="foobar2">
      <div class="foobar3"></div>
      <div class="foobar4"></div>
      <div class="foobar5"></div>
      <div class="foobar6"></div>
      <div class="foobar7"></div>
    </div>
  </div>
</div>
<script src="http://yui.yahooapis.com/3.8.1/build/yui/yui-min.js">
</script>
<script>
  YUI().use("node", function(Y) {
    window.Y = Y;
  });
</script>

Preparation code output

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Y.one(".foobar7");
Y.one(".foobar7");
Y.one(".foobar7");
Y.one(".foobar7");
 

Y.one(".foobar3");
Y.one(".foobar4");
Y.one(".foobar5");
Y.one(".foobar6");
 

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